Mr556 quad rail

Heckler & Koch MR556 Quad Rail Handguard (1) Currently Unavailable. ... Manta Defense Rails M27 AR Kit Currently Unavailable. Advanced Armament Corporation Complete Upper .300 Blackout 16 Inch Barrel 51-Tooth Blackout Flash Suppressor 5/8-24 TPI Threads 101716 Currently Unavailable.

H&K HK MR556/MR762/HK416 A5 Rail Cover Set - RAL 8K. Each rail measures:8 3/8" Long (X2), 1 X Short rail 6" Long1 3/8" WideBrand new Heckler & Koch HK 416A5 Style picatinny rail covers made of high impact HK polymer. Each rail is equipped with a quick release tab & marked with the HK logo. These are specifically made for HK MR762, MR556 & HK ...Deck railing spacing is an important consideration when it comes to the safety and aesthetics of your outdoor space. While it may seem like a simple task, many homeowners make comm...Taking an essentially standard MR762A1 (caliber 7.62 x 51 mm NATO) semi-automatic rifle, Heckler & Koch USA turns it into a more effective precision rifle by an astute addition of the right optics and accessories. A Vortex Viper PSTII 3-15×44 FFP MRAD, HK G28 adjustable cheekpiece buttstock, and LaRue Tactical BRM-S bipod are the primary add ...Omaha Outdoors has custom and factory in stock HK MR556 models for sale. ... HK MR556 Quad Rail. Price $379.00. 236204. Heckler and Koch (HK) ... HK MR556 9 Inch Rail ... H&K MR556 Quad Rail Handguard 236204. Be the first to review this product. H&K MR556 Quad Rail Handguard. Manufacturer: Heckler & Koch. SKU: 130453. Manufacturer part number: 236204. UPC: 642230247642. $379.00. the standard quad rail that comes on the MR and 416, is bulky/large diameter. I personally would never use that much rail space, so why pack it around. …Simply put, the MR556 is the civilian version of the HK 416. This is a pistol AR-15 that is chambered in 5.56 Nato. These are premium and overbuilt rifles that function extremely well. They are known for being reliable and also expensive. The biggest downside of these rifles is the weight. They are heavy and cumbersome.

The Super Modular Rail (SMR) MK4 M-LOK™ is Geissele’s ultra-rugged M-LOK option. These rails are purpose-built and feature integrated M1913 picatinny rail sections at the fore of the rail in the 3, 6 and 9 o’clock positions. Maximum venting for heat dissipation also dramatically reduces the rail's overall weight, while maintaining its ...• HK416/MR556 9" Quad Rail: $335 -- SOLD to ryandarr1979 . See less See more 4 Save Share. Like. Sort by Oldest first Oldest first Newest first Most reactions. R. ryandarr1979. 315 posts ...Shop UTG Pro M-LOK MR556 15in Super Slim Free Float Handguard | $10.00 Off Highly Rated on 3 Reviews for UTG Pro M-LOK MR556 15in Super Slim Free Float Handguard + Free Shipping over $49. ... TRYBE Defense AR-15 M-LOK Lightweight Quad Handguard w/ Full Rail, 15in, Black, HDG15QFR-BL (21) $164.99 $119.99 Save Up to $55.00. Coupon …If you’re in the market for a quad, buying a used one can be a smart choice. Not only can it save you money, but it also allows you to get a higher-end model or additional accessor...Traveling by train is a convenient and efficient way to get around, but the cost of national rail tickets can quickly add up. Luckily, there are several tips and tricks you can use...Sale! HK 416A5 Style Quad Rail Foregrip Handguard Tan/RAL8000 (Blem) $27900Original price was: $27900.$17900Current price is: $17900. SKU: HK416BCGNBLM-1Category: hide-from-searchTags: 416, 416A5, MR556, RAL8000Product ID: 7024. NOTE: Picture of blemish is only a representation, actual product may differ.I purchased this from a local seller. He said it is a genuine HK quad rail. But after I checked out the photos on the forum. It kinda looks like an airsoft clone to me. 1. There are no welding and screw retainer on the mounting part. 2. The screw and rail edge seems different.

When it comes to exploring Spain, there’s no better way to soak in the country’s rich culture and breathtaking landscapes than by rail. And when it comes to train travel in Spain, ...HK 416, MR556, & MR762 Quad Rail Picatinny Rail Cover - Black Brand new Heckler & Koch Picatinny rail covers made of high-impact HK polymer. Each rail is equipped with a quick-release tab and marked with the HK logo. Compatible... HKP-01743 $19.95. Add to Cart Compare Quick view. Qty in Cart: 0 ... Includes a New Factory HK-416 Short 9″ Inch Quad Rail Modified with the Adjustable Gas Block Access Cut-Out and Marked N-S. Test Fired by TDyer Gunsmith Only with and With-Out a Suppressor for Function Check. Factory Black. S/N 241-402231 File Pics. The HK MR556, civilian model to the HK416, is a fine weapon and built like a heavy tank. It is a bit heavy at 8 pounds empty and over 9 pounds loaded. ... I take it this rifle comes with the older modular rail system quad rail HG ( not what is pictured) but are the BUIS the HK diopter or the TROY flip up type sights? Thank you. Answered;

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Handguard (9.5") with Picatinny profile on 3, 6 and 9 o'clock, STANAG 4694 profile on 12 o'clock and integrated flip up front sight (33 mm sighting line).Description. The Geissele Super Modular HK 416 rail was designed to replace the standard rail on the HK 416 weapon platform. Constructed of precision machined, 6061-T6 aluminum allows the SMR HK to incorporate strength, rigidity and modularity while utilizing the stock HK barrel nut. Finished in Type 3 Hardcoat Anodize to meet military ...Picked up a 2021 MR556. Changed out the M-loc rail for the German made 11" quad rail and added a Tango Down VFG and some Knights Armament sights.Home. Rifle/SMG Parts. H&K HK 416/MR556 Quad Rail. H&K Heckler & Koch. H&K HK 416/MR556 Quad Rail. (No reviews yet) Write a Review. SKU: HKP-16858. UPC: …Extra shipping cost of $5.00. Bolt Catch Clamping Sleeve, New Factory Original MR556, MR762 HECKLER & KOCH. Firearm Mfgr: HECKLER & KOCH. Firearm Model: MR556, MR762. Product #: 1567250A. $7.62. Add to Cart. Bolt Catch, New Factory Original MR556 HECKLER & KOCH. Firearm Mfgr: HECKLER & KOCH.

HK MR556 & HK416 DMR Length 15" Quad Rail - Extended HKP-18018 Out Of Stock. Quick view. HKP HK MR556/416 DMR Extended 15" M-LOK Handguard - Black. HKP HK Parts ... HK416, MR556 Replacement Handguard Rail Screw - Hex- Stainless SteelHex head replacement handguard retension screw for your HK416, MR556 forearm. ...HK MR762, 417 Extended Free Floating Rail System - Black. New Heckler & Koch MR762, HK 417 & G28 Extended DMR (designated marksman rifle) Forearm With Flip Up Front Sight & Suppressor Window Cutout. Optimized design to mitigate the heat emissions for long range shooting and to prevent the mirage effect. Each hand guard includes cutout …HK MR556/416 Series. Our extensive collection boasts a wide array of HK MR556 and HK 416 parts, including precision HK MR556 Barrels and durable HK 416 Stocks. Elevate your rifle's functionality with HK 416 Handguards and HK MR556 Triggers, designed for the discerning shooter seeking top-tier performance. Sort By:The Super Modular Rail HK416 MK15 MLOK was designed to replace the standard rail on an HK416 or MR556 weapon platform. The rail system utilizes the stock HK barrel nut, but incorporates the strength, rigidity and modularity expected of a Geissele product. Made from 6061-T6 aluminum and finished in type 3 hardcoat anodize, the SMR HK416 MK15 ...Jun 14, 2021 · geissele handguard kinetic mr556 rail. Jump to Latest Follow. 34K views 71 replies 20 participants last post by FloridaMan 8d ago. FloridaMan Discussion starter. 87 posts · Joined 2021. #1 · Jun 13, 2021 (Edited) *UPDATE 07/2021: Geissele SMR M-LOK added. --------------------------------- Hey everybody, Includes a New Factory HK-416 Short 9″ Inch Quad Rail Modified with the Adjustable Gas Block Access Cut-Out and Marked N-S. Test Fired by TDyer Gunsmith Only with and With-Out a Suppressor for Function Check. Factory Black. S/N 241-402231 File Pics.HK 9" Quad Rail KAC 600M Rear / KAC M4 Front Trijicon TA31H-G with Trijicon RMR06 Type 2 LaRue LT799 Mount I also have the factory 9" HKey handguard. My MR556A1 is an "approximation" of the M27. My MR762A1 (CB date code ... lightweight barrel) Geissele SDMR Handguard (DDC) Troy Offset Front / Rear (FDE) Vortex Razor …MR556, Upper Receiver kit - includes bolt, buffer, buffer spring, rifle length M-LOK handguard and 16.5" medium contour barrel assembly ... MR556 9" quad rail ... HK designed & manufactures in Germany 11" HK416, MR556 extended quad rail. This drop in unit offers 2 full inches in extra length. Not the standard 9" rail that comes with the HK 416/MR556 but...

H&K HK MR556/416 Extended 11" Quad Rail - Black. HK designed & manufactures in Germany 11" HK416, MR556 extended quad rail. This drop in unit offers 2 full inches in …

Login. HK 416/M27 USMC Style Quad Rail Foregrip Handguard Black. $27900. SKU: M27QRFGHGCLNE-1Categories: 416 417 G28 M110, Services HK416 MR556Tags: 416, M27, MR556Product ID: 6167. HK 416/M27 USMC style quad rail foregrip/handguard. Fits HK MR556/416 and all in spec clones. Clone part ( not factory HK )Many people are used to dual core processors these days, but quad core processors are far better suited to high-spec gaming and video editing. Even as laptops with six or more proc...Get your questions about Heckler & Koch MR556 Quad Rail Handguard answered by Expert staff and verified buyers including aesthetics, compatibility, durability & more! OpticsPlanet. Toll-Free: +1-800-504-5897 Live Chat Help Center Check Order Status.HK MR556 Standard Factory Foregrip Rail Handguard MLOK $ 149 00. SKU: MR556SR-1 Categories: 416 417 G28 M110, ... HK 416C Style Short Quad Rail Foregrip Handguard Black HAO's HK style Quad Rail For HK416/MR556 Why buy a poor quality rail on your PTW HK416? HAO's HK Style Quad rail is 100% made every details as same as RS . *It's standard equipped on 416V2 Standard kit. Anodizing/surface treatment disclaimer : Anodizing is a serious chemical process that is fairly unstable. The shade of color can vary batch by ... HK MR762 Quad Rail Picatinny Rail Handguard Cover Set - 3 Rails Per Set Each rail measures:8 3/8" Long1 3/8" WideBrand new Heckler & Koch picatinny rail covers made of high impact HK polymer. Each rail is equipped with a quick release tab & marked with the HK logo. These are specifically made for HK MR762, MR556 & HK 416, 417 rifles.Switzerland is renowned for its breathtaking landscapes, picturesque towns, and efficient rail network. One of the best ways to explore this stunning country is through a rail tour...HK MR556 Upper kit includes: Complete MR556 Upper Receiver/Barrel Assembly— HK 16.5 inch cold-hammer forged barrel, upper receiver with forward assist, extended …Picked up a 2021 MR556. Changed out the M-loc rail for the German made 11" quad rail and added a Tango Down VFG and some Knights Armament sights. HK MR762/417 Picatinny Quad Rail Handguard Complete - Black. (No reviews yet) Write a Review. SKU: HKP-16629. UPC: MPN: 235870. Previous. $589.95.

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12.7" Super Modular Rail MK7 - Black. $550.00. This product is made in limited quantities for High Power shooters. They are available during summer time to coincide with Camp Perry. Out of stock. View Details. Geissele Automatics has been known for manufacturing the finest quality AR-15 handguards and rails. Shop your ideal AR-15 super modular ... SKU: HKP-02546. UPC: 642230247642. MPN: 236204. $0.00. Add to Wish List. Description. Additional Information. HK 416, MR556 Quad Rail- Standard Length. HK …The Grand Canyon is one of the most breathtaking natural wonders in the world, and exploring it by rail is an experience like no other. The Grand Canyon Railroad Tour offers a uniq...HK designed & manufactures in Germany 11" HK416, MR556 extended quad rail. This drop in unit offers 2 full inches in extra length. Not the standard 9" rail that comes with the HK …Specifications. Handguard Style: Picatinny. Make Model Fit: Heckler & Koch.416;Heckler & Koch.MR556. Show All Specifications. Restriction. Restricted Part: Yes. Oversea …M27 rail on a 2021 MR556, barrel nut question ? Jump to Latest Follow 2K views 6 replies 4 participants last post by Meatpukk Aug 25, 2021Quad Rail - HK 416, MR556 HK German 416, MR556 Quad Rail Without Mounting Screw.Charcol gray in color. Fits all: MR556 HK416 Length: 9 1/4" HKP-16858HK416 Quad Rail Handguard 11 Inch HK416 Quad Rail Handguard 11 Inch. Product #: 134384 Condition: Factory New MPN: 50233617 UPC: 642230247635 MFG: Heckler and Koch (HK ... Maxim Defense HK 416 / MR556 M-Slot Handgu ... $395.00. BCM KMR Alpha 17. $221.95. Noveske NSR 13.5. $277.63. F1 Firearms C7K Handguard 14.75 Inch. … Price: $250 shipped/insured via PayPal F&F Sold. HK Germany 416, MR556 Quad Rail - Extended 11”. Purchased new by me a few days ago, only briefly temp-installed without torque or the screw to check clearance and feel, otherwise unused. This transaction has been logged and flairs have been adjusted. Thank you! Quoted: My cousin just picked up his MR556 and he’s wanting a 11 inch quad rail for it. So far we’re striking out besides HK parts and they’re out of stock. View Quote. Search the sale forums, hkpro usually has a few used ones for sale much cheaper than hkparts. Or he could just buy a Geissele and be done with it.Jun 24, 2021 · HibikiR. 240 posts · Joined 2019. #8 · Jun 25, 2021. Looking at the French HK416, a 9.5" railed handguard would be enough to cover most if not all of the gas block. However, that handguard type is meant to be paired with the A5 upper, not the MR556 upper. Too bad nobody has them in stock right now. Like. ….

itted to the MR Series. Both HK rail system handguards can be installed and removed with simple tools and return to zero when reinstalled. The MR556A1 also has a Picantinny rail machined into the top of its upper receiver for mounting optics and mechanical sights. Unlike earlier prototypes, major subassemblies, including the MR556A1 upper receiver/A rail car wheel and axle can weigh between 11 to over 400 pounds. The full weight depends on the manufacturer, as well as the type of wheel and axle used to make the assembly. Sta...Are you in need of a new railing for your home or business? If so, you may be searching for “railing contractors near me” to find the best local professionals. However, with so man...Frankly, any weight you can take off the front end of a MR556/HK416 is welcome, and the SI SLICK Handguard Rail should assist with that. It also looks good on the gun. The following SLICK information comes directly from the Strike Industries website: “SLICK Handguard for HK416 MR556 Walther HK416 D145RS SKU#: SI SLICK Availability: In stock ... USC/UMP Receiver Rail. $19.99. Add to cart. G36K Handguard with Heat shield. $63.00. ... MR556/MR762 Carrying Sling. $108.00. OUT OF STOCK. Notify Me. HK 33.0mm ... HK MR762, 417 Extended Free Floating Rail System - Black. New Heckler & Koch MR762, HK 417 & G28 Extended DMR (designated marksman rifle) Forearm With Flip Up Front Sight & Suppressor Window Cutout. Optimized design to mitigate the heat emissions for long range shooting and to prevent the mirage effect. Each hand guard includes cutout …Heckler Koch MR556 Quad Rail Handguard 236204. SKU 236204-HK. Review this product. Item is out of stock and cannot be backordered.HK416 Quad Rail Handguard 11 Inch HK416 Quad Rail Handguard 11 Inch. Product #: 134384 Condition: Factory New MPN: 50233617 UPC: 642230247635 MFG: Heckler and Koch (HK ... Maxim Defense HK 416 / MR556 M-Slot Handgu ... $395.00. BCM KMR Alpha 17. $221.95. Noveske NSR 13.5. $277.63. F1 Firearms C7K Handguard 14.75 Inch. …2 / 4. HECKLER & KOCH Rail System,Free Floating,HK416,Lo. Add To Favorite. Rail System,Free Floating,HK416,Lo. Brownells # 760001725. MFR # 50233617. UPC. 642230247635. $373.99. Out of Stock. NOTIFY ME. Add To Favorite. Can we ship this to you? Check. How To Buy Guns Online. International purchase information. Specifications. Handguard Style: Mr556 quad rail, HAO's HK style Quad Rail For HK416/MR556 Why buy a poor quality rail on your PTW HK416? HAO's HK Style Quad rail is 100% made every details as same as RS . *It's standard equipped on 416V2 Standard kit. Anodizing/surface treatment disclaimer : Anodizing is a serious chemical process that is fairly unstable. The shade of color can …, Geissele SMR 416. Product #: 112126 Condition: Factory New MPN: 05-191B UPC: 854014005885 MFG: Geissele Automatics. Price: $469.00. Layaway payment as low as $117.25 per month. Get a layaway quote! Free Shipping Ammo, Part, and Accessory orders with a $200 minimum purchase and within the continental United States. Free Shipping Info. , The Super Modular Rail (SMR) MK4 M-LOK™ is Geissele’s ultra-rugged M-LOK option. These rails are purpose-built and feature integrated M1913 picatinny rail sections at the fore of the rail in the 3, 6 and 9 o’clock positions. Maximum venting for heat dissipation also dramatically reduces the rail's overall weight, while maintaining its ..., The MR556A1 features a 16.5” barrel with a 1x7 barrel twist that’s free floated and covered by a removable quad rail. Housed inside the quad rail is the system’s gas piston and push rod. These parts are easily field stripped from the rifle but the quad rail must be removed in order to access these parts., H&K HK MR556/416 Extended 11" Quad Rail - Black. HK designed & manufactures in Germany 11" HK416, MR556 extended quad rail. This drop in unit offers 2 full inches in …, Do you know the rules for riding the rails? View these 10 train etiquette tips to keep your ride smooth on the subway. Advertisement If you ride a train at least sometimes, you kno..., Buy a HK 416MR556 Quad Rail for sale by Jays Guns and Accessories on GunsAmerica.com the best online marketplace for buying and selling semi auto pistols, firearms, accessories, and collectibles : 917860645, 1944Willys's Review of Heckler & Koch MR556 Quad Rail Handguard. Great example of you get what you pay for....expensive, but bulletproof! Excellent workmanship, perfect finish, and airtight lockup with the barrel nut. The only drawback on this is the weight, on a firearm that’s already front heavy., The Super Modular Rail HK416 M-LOK was designed to replace the standard rail on an HK416 or MR556 weapon platform. The rail system utilizes the stock HK barrel nut, but incorporates the strength, rigidity …, Are you looking for an easy way to find out the train times for your National Rail Enquiries journey? With the help of the National Rail Enquiries website, you can quickly and easi..., HAO's HK style Quad Rail For HK416/MR556 Why buy a poor quality rail on your PTW HK416? HAO's HK Style Quad rail is 100% made every details as same as RS . *It's standard equipped on 416V2 Standard kit. Anodizing/surface treatment disclaimer : Anodizing is a serious chemical process that is fairly unstable. The shade of color can …, A rail car wheel and axle can weigh between 11 to over 400 pounds. The full weight depends on the manufacturer, as well as the type of wheel and axle used to make the assembly. Sta..., Amtrak is introducing Amtrak Airo, an all-new trainset that will enter service in 2026 and replace the aging Amfleet cars. We may be compensated when you click on product links, su..., DEMO, Heckler & Koch HK416 Handgaurd, 11 in, 50233617 , MPN: 50233617-DEMO , Code: 13-FO-ML4161T-50233617-DEMO. Shop Heckler & Koch HK416 11" Handgaurd | 19% Off 5 Star Rating on 4 Reviews for Heckler & Koch HK416 11" Handgaurd + Free Shipping over $49., Login. HK 416A5 Style Quad Rail Foregrip Handguard Tan/RAL8000. $27900. SKU: HK416BCGN-1-1Categories: 416 417 G28 M110, New Products, Services HK416 MR556Tags: 416, 416A5, MR556, RAL8000Product ID: 5063. HK 416A5 style quad rail foregrip/handguard with built in front sight. Fits HK MR556/416 and all in spec clones., The Super Modular Rail (SMR) MK4 M-LOK™ is Geissele’s ultra-rugged M-LOK option. These rails are purpose-built and feature integrated M1913 picatinny rail sections at the fore of the rail in the 3, 6 and 9 o’clock positions. Maximum venting for heat dissipation also dramatically reduces the rail's overall weight, while maintaining its ..., HK MR556 & HK416 DMR Length 15" Quad Rail - Extended HKP-18018 Out Of Stock. Quick view. HKP HK MR556/416 DMR Extended 15" M-LOK Handguard - Black. HKP HK Parts ... HK416, MR556 Replacement Handguard Rail Screw - Hex- Stainless SteelHex head replacement handguard retension screw for your HK416, MR556 forearm. ..., I have a standard length MR556 quad rail for sale along with a set of MR556/416 sights. The quad rail has been sitting inside of my safe for about 2 or 3 years and is brand new asking $200 plus $10 shipping. The sight set consists of a folding front 28mm and a rear diopter sight for use with 14.5 -16.5 inch barrels., MR556 11" Extended Quad Rail. Want to Buy Leave A Review Message Buyer C. changj 5.00 star(s) (5.0) 5 reviews $1 USD. Mar 3, 2022 (Edited Mar 3, 2022) Looking for a new or like new 11" HK factory extended quad rail for the MR556. Thanks! Save Share. Like. 1 - 1 of 1 Posts ..., The Upper Receiver Kit also includes the HK Free Floating Rail System (FFRS) handguard with its four MIL-STD-1913 “Picatinny” rails. ... Part No. 81000584, UPC 642230262607 – MR556, Upper Receiver kit – includes bolt, buffer, ... MR556 9″ quad rail handguard: 379: 50233617: 642230247635: HK416 11′ handguard: 416: 51000223:, International Building Code regulations state that a deck railing must be at least 36 inches high if the deck is 30 inches or more higher than the adjoining ground., Home. Rifle/SMG Parts. H&K HK 416/MR556 Quad Rail. H&K Heckler & Koch. H&K HK 416/MR556 Quad Rail. (No reviews yet) Write a Review. SKU: HKP-16858. UPC: …, • HK416/MR556 9" Quad Rail: $335 -- SOLD to ryandarr1979 . See less See more 4 Save Share. Like. Sort by Oldest first Oldest first Newest first Most reactions. R. ryandarr1979. 315 posts ..., Just got a brand new MR556 and want the geissele rail, and already ordered the flip ups. Want to trade the factory quad rail and diopter sights for a 14.5 inch Geissele rail (NIB or close to and black), or sell for $450 shipped and I will order the rail myself. Other than opening the box up..., HK MR556 416 Adjustable Gas Block For 14.5-16in Barrel $ 419 00. Out of stock. ... HK 416D Style N-S Cutout Quad Rail Foregrip Handguard Black $ 199 00., Do you know the rules for riding the rails? View these 10 train etiquette tips to keep your ride smooth on the subway. Advertisement If you ride a train at least sometimes, you kno..., HK416/MR556 9" Quad Rail Handguard. Bought. Leave A Review. BugNugJum (5.0) 4 reviews. $111,111 USD. 1d ago. Howdy all, I am looking for an HK416/MR556 9" 1913 Quad Rail Handguard. If anyone has one they're willing to sell, let me know your price and we can talk., H&K HK MR556/MR762/HK416 A5 Rail Cover Set - RAL 8K. Each rail measures:8 3/8" Long (X2), 1 X Short rail 6" Long1 3/8" WideBrand new Heckler & Koch HK 416A5 Style picatinny rail covers made of high impact HK polymer. Each rail is equipped with a quick release tab & marked with the HK logo. These are specifically made for HK MR762, MR556 & HK ..., H&K HK MR556/MR762/HK416 A5 Rail Cover Set - RAL 8K. Each rail measures:8 3/8" Long (X2), 1 X Short rail 6" Long1 3/8" WideBrand new Heckler & Koch HK 416A5 Style picatinny rail covers made of high impact HK polymer. Each rail is equipped with a quick release tab & marked with the HK logo. These are specifically made for HK MR762, MR556 & HK ... , Tags: 416, H&K, HK MR556 A1, MR556, MR556A1. ... Full length rail system and front quad rail; Tons of storage in the grip and stock; Upper and lower are incredibly tight; Flared magwell; Upper will fit other AR lowers; The Bad: The rifle weighs 8.6 lbs; An HK sight tool is not included;, For the new series of Heckler and Koch semi-automatic MR rifles, HK designers and engineers believe best accuracy comes with an unlined bore.”. The MR556A1 features a 16.5” barrel with a 1x7 barrel twist that’s free floated and covered by a removable quad rail. Housed inside the quad rail is the system’s gas piston and push rod., Seven sides of M-LOK™ compatible slots. Lightweight, rugged 6061 aluminum construction, mil-spec hard coat anodized. Cross bolt constructed of heat treated 4140 phosphate finished. 9 Inch Carbine weighs 9.9 oz with cross bolt (M-LOK™ compatible rail adds .5 oz) 13.5 Inch Length weighs 14.0 oz with cross bolt (M-LOK™ compatible rail adds ..., HECKLER AND KOCH MR556 QUAD RAIL HANDGUARD. SKU: 236204. UPC: 642230247642. $379.00. Out of Stock. $305.47. or 4 interest-free payments of $76.36 with Learn more. Add to Wishlist. How to Buy a Gun Online.