All Parts
At HK PARTS, we bring you a wide array of high-quality H&K accessories and components for your favorite firearms. Whether you're upgrading your H&K pistol or rifle, or even looking for parts kits, we've got you covered. Discover a range of top-rated components for popular models like VP9, USP, P30, MP5, G36, HK416, and more. From triggers, barrels, and grips to magazines, stocks, and sights, we have it all. Enhance your firearm's performance and functionality with our premium components.
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H&K 30 Round HK MR556/416 5.56/.223 Maritime Magazine - Black
H&K Heckler & Koch
$59.00HK 416, MR556 30 Round Maritime Magazine - German HK The HK 416 and MR556 magazines will also fit all AR15/M16 variants. Designed to provide optimum ammunition feeding for any M16/M4/AR15-type weapon. Originally developed by HK for the British L85 (SA80)...HKP-00487$59.00 -
H&K HK MR556/416 Gas Block Roll Pin
H&K Heckler & Koch
$7.95HK 416 & MR556 Gas Block Pin This is the retaining pin for an HK 416 gas block. A must-have, as HK recommends using new pins once they are removed or damaged. Size: 5 x 18 mm.HKP-02534$7.95 -
H&K HK MR556/416 Enhanced Buffer Spring
H&K Heckler & Koch
$19.95Enhanced HK German MR556 & 416 Buffer Spring The HK MR556/416 buffer spring will also work with other AR-15 and M-16 rifles. This is the finest AR15 style buffer spring available. A high wear item and a must have replacement part. Compatible...HKP-00039$19.95 -
Magpul PMAG 30 Round AR-15 5.56 / .223 Magazine-Windowed
Magpul
$15.95The Gen M3 PMAG is a 30-round 5.56x45 NATO (.223 Remington) polymer magazine for AR15/M4 compatible weapons. Modified internal and external geometry also permits operation with a wide range of non Colt-spec platforms such as the HK 416 and MR556A1,...HKP-16441$15.95 -
H&K HK MR556/416 Backplate w/ Sling Loops
H&K Heckler & Koch
$46.95HK 416, MR556 Ambidextrous Sling Loop BackplateGenuine HK German manufactured 416, MR556 new style backplate with sling loop.Fits the following: HK MR556, HK 416 buffer tubes All Standard AR-15, M4 & M16 buffer tubesHKP-17151$46.95 -
H&K HK MR556/416 Tungsten Recoil Buffer
H&K Heckler & Koch
$76.95H&K HK MR556 & 416 Tungsten Recoil Buffer The proprietary tungsten HK-manufactured buffer is one of the reasons why the HK 416 and MR556 are as reliable as they are. This is the perfect addition to all AR/M16 uppers. Compatible With: HK...HKP-00041$76.95 -
H&K HK MR556/MR762/416/417 Front Sight
H&K Heckler & Koch
$149.95HK MR556, HK416 & MR762 & HK 417 Fixed Front Sight Assembly German HK front fixed sight for use with a rear diopter style sight. It can also be used on some other Ar-15/M-16 applications. Complete with all mounting hardware for a Picatinny rail...HKP-00025$149.95 -
H&K HK MR556/MR762/416/417 Battle Grip w/ Storage - Black
H&K Heckler & Koch
$79.95HK 416, MR556, MR762, & HK 417 Battle Grip With Storage Compartment New HK German factory battle grip with a storage compartment in the bottom. Each grip will fit all AR-15/M-16 lower receivers as well. It has a superior fit and feel to any other...HKP-00033$79.95 -
H&K HK MR556/MR762/416/417 Firing Pin Spring
H&K Heckler & Koch
$14.95HK MR556, MR762 Firing Pin Spring - German This part is great to have on hand as this item is a high wear and replacement part and one of the most common breakage parts on the HK 416/MR556 rifles. Compatible With: HK MR556 HK MR762 HK 416 HK 417 HK...HKP-00928$14.95 -
H&K HK MR556/MR762/416/417 Handguard Rail Cover - Black
H&K Heckler & Koch
$19.95HK 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 -
Out Of Stock
H&K HK MR556/416 Ejection Port Cover - RAL 8K
H&K Heckler & Koch
$59.95HK German HK 416, MR556 Ejection Port Cover In RAL8000 HK manufactured newer polymer style cover assembly found on the latest HK 416 & MR556's. This item can also be used on other AR15 style projects to enhance the build with the finest ejection port...HKP-18062$59.95 -
H&K HK MR556/416 14.5"/16.5" Rear Diopter Sight
H&K Heckler & Koch
$199.95H&K HK MR556 & 416 14.5"/16.5" Rear Diopter Sight HK German Rear Diopter Sight is the proper rear sight to pair with all HK 416 14.5, and MR556 uppers and rifles. This sight can be paired with a fixed front sight or folding front sight.HKP-00027$199.95 -
Out Of Stock
H&K HK MR556/MR762/416/417 Battle Grip w/ Storage - RAL 8K
H&K Heckler & Koch
$69.95HK 416, MR556 & MR762, HK 417 Battle Grip With Storage Compartment- FDE New HK German factory battle grip with storage compartment access located in the bottom of the grip. Each grip will fit all AR-15/M-16 lower receivers. Superior fit & feel to...HKP-18584$69.95 -
HKP HK MR556/416 Handguard Rail System Hex Screw
HKP HK Parts
$9.95HK416, MR556 Replacement Handguard Rail Screw - Hex- Stainless SteelHex head replacement handguard retension screw for your HK416, MR556 forearm. Made in the USA from 17-4 SS with a 5mm hex head for ease and use when installing and taking off the...HKP-17657$9.95 -
On Sale
Magpul 30 Round AR-15, HK MR556, HK 416 PMAG M3 Magazine
Magpul
Now: $12.95Was: $18.95Magpul 30 Round AR-15, HK MR556, HK 416 PMAG M3 Magazine This magazine is the latest and greatest M3 model - NON-windowed PMAG (Polymer Magazine) and is a lightweight 5.56 NATO, M-16 compatible magazine. It features a pop-off storage/dust cover that...HKP-00639Now: $12.95Was: $18.95 -
H&K G36/MR556/MR762/416 (5.56/.223/7.62x51/.308) Extractor Spring
H&K Heckler & Koch
$8.95HK German Extractor Spring A must-have replacement wear part and a great item to have on hand. Compatible With: HK G36 HK G36K HK G36C HK SL8 HK 416 HK MR556HKP-00288$8.95 -
Out Of Stock
H&K HK MR556/416 Mil-Spec German E1 Rear Stock - Black
H&K Heckler & Koch
$0.00H&K HK MR556 & 416 Mil-Spec German E1 Rear Stock - Black The HK E1 Buttstock fits MILSPEC buffer tubes (receiver extensions) for M4/AR15-type weapons. Each stock comes with the convex buttpad as found on factory-issued HK 416s. Compatible...HKP-00052$0.00 -
H&K HK MR556/MR762/416//417 Complete Piston Rod Assembly
H&K Heckler & Koch
$64.95H&K HK MR556, MR762, 416, & 417 Complete Piston Rod Assembly A great replacement or spare to keep on hand. Compatible With: HK MR556 HK 416 HK 416 A5 MR762 HK 417 Please Note: Does not fit barrels less than 10 inches.HKP-00042$64.95 -
H&K HK MR556/416 Ejection Port Cover Door Assembly
H&K Heckler & Koch
$51.95HK German HK 416, MR556 Ejection Port Cover Door Assembly Complete This is the newer polymer style cover found on the latest HK 416 and MR556's. This is the complete ejection port door assembly needed on all AR15 or MR556/HK416 models. Can also be used...HKP-16951$51.95 -
H&K HK MR556 Rear Lower Receiver Locking Pin
H&K Heckler & Koch
$59.95HK MR556, MR762 Locking Pin With Spring Loaded DetentFor the MR556 & MR762 or other AR15 Variants. This is the Rear takedown pin with ball detent and locking mechanism installed. The idea behind this type of system is to decrease the movement of the...HKP-02672$59.95 -
H&K HK MR556/MR762/416/417/G36/SL8 Complete Gas Piston
H&K Heckler & Koch
$50.95HK MR556, MR762, 416, 417, G36, & SL8 Complete Gas Piston New HK German gas piston assembly with three locking piston rings installed. This is a great spare part to have on hand, as the gas piston takes a lot of wear and tear. Compatible With: HK...HKP-00047$50.95 -
H&K HK MR556/MR762/416/417 V2 Battle Grip
H&K Heckler & Koch
$69.95HK MR556, HK416 & MR762, HK417 Variant 2 Battle Grip With Contoured Back Strap HK-manufactured AR15-style pistol grip will fit all AR-15/M-16 lower receivers as well. It is a great upgrade for any AR15, M16/416 style firearm. Provides...HKP-01912$69.95 -
HKP HK MR556/416 Bench Mat
HKP HK Parts
$24.95HK MR556, HK 416 Bench MatOur HK MR556, HK416 bench mat is the perfect cleaning & repair mat designed specifically for your Heckler & Koch MR556 & HK416 models. Have fun and learn while you work on your favorite H&K firearm. The soft top...HKP-17169$24.95 -
H&K HK MR556/MR762/416/417 Tactical Sling - Black
H&K Heckler & Koch
$76.95H&K HK MR556, MR762, 416, & 417 Tactical Sling - Black OEM HK German part. The tool is built into the HK sling hook. For the MR556 model, a sling adapter will be needed for the front attachment point as the MR556 lacks the ambi sling loop on the...HKP-00028$76.95 -
H&K HK 416/MR556/MR762 Trigger Guard Pin
H&K Heckler & Koch
$3.95HK MR556, 416 Trigger Guard Retaining Pin HK 416 HK MR556HKP-02678$3.95 -
Out Of Stock
HKP Piston 3-Ring Replacement Set
H&K Heckler & Koch
$0.00HKP Gas Piston Ring Replacement Combo Set- 3 Rings The gas rings are prone to periodic breakage and wear and tear and require them to be replaced periodically. These are some of the most common breakage parts we see that need to be replaced on these...HKP-00048$0.00 -
Out Of Stock
H&K HK MR556/416 Extended 11" Quad Rail - Black
H&K Heckler & Koch
$387.95HK MR556/416 Extended 11" Quad Rail - Black This drop-in unit offers two full inches in extra length, not the standard 9" rail that comes with the HK 416/MR556, but an extended 11" rail that allows for a longer sight radius and more rail space...HKP-01960$387.95 -
H&K HK MR556/416 Ejection Port Cover - Black
H&K Heckler & Koch
$34.95HK German HK 416, MR556 Ejection Port CoverHK manufactured newer polymer style cover assembly found on the latest HK 416 & MR556's. This item can also be used on other AR15 style projects to enhance the project with the finest ejection port cover...HKP-15229$34.95 -
H&K HK MR556/416 Clamping Sleeve Safety Lever
H&K Heckler & Koch
$7.95HK German HK 416, MR556 Clamping Sleeve For Safety Levers. There are one of the same pin on both sides.HKP-15252$7.95 -
Barrel Nut - HK 416, MR556 - Stainless Steel
$39.95HK MR556, HK 416 Barrel Nut or Socket For Barrel - Stainless Steel A must have repair and replacement part for removal or when you have any work done to your barrel as the barrel nut may become damaged in the removal and installation processes. Made in...HKP-17334$39.95 -
H&K HK MR556/MR762/416/417 Detent Takedown Pin
H&K Heckler & Koch
$7.95HK MR556, 416, MR762, & HK 417 Takedown Detent Pin Compatible With: HK 416 HK MR556 HK MR762 HK 417HKP-02540$7.95 -
Out Of Stock
HKP HK MR556/MR762/416/417 Front Diopter Sight
HKP HK Parts
$89.95HK MR556, HK416 & MR762 & HK 417 Fixed Front Sight Assembly - USNew US Made HK style front fixed sight for use with the rear diopter style rear sight options. Can also be used on some other AR-15/M-16 applications.New US Manufacture. Complete...HKP-17716$89.95 -
Magpul 20 Round PMAG M3 Magazine
Magpul
$23.49Magpul PMAG 20-LR 20-Round 7.62 NATO The 7.62x51 NATO (.308 Winchester) PMAG 20LR is a cost-effective, highly reliable magazine for SR25/M110 pattern rifles featuring a 20-round capacity, constant-curve body, and snap-on impact/dust Cover. Designed...HKP-01651$23.49 -
H&K 10 Round HK MR556/416 5.56/.223 Magazine - Black
H&K Heckler & Koch
$69.95HK416 & MR556 Factory - 10 Round Steel Maritime Coated Magazine Compatible with AR-15 & M16 firearms. All steel & stainless construction, maritime coated & made to last a lifetime. Compatible With: HK MR556 HK 416 HK...HKP-02421$69.95 -
H&K 20 Round HK MR556/416 5.56/.223 Magazine - Black
H&K Heckler & Koch
$69.00H&K 20 Round HK MR556 & 416 5.56/.223 Magazine - Black New HK416 and MR556 Factory 20 Round Steel Maritime Coated Magazine. Will fit and work in all AR-15/M16 weapons. Perfect for those who need a lower profile magazine or who will be doing prone...HKP-00029$69.00 -
H&K HK MR556/MR762 Receiver Take Down Tool
H&K Heckler & Koch
$19.95HK MR556 & MR762 Take Down Tool For The Upper & Lower Receiver This part is the tool used to tighten down the stock movement on the E1/E2 stock. Each tool will be stored in the rear of the E1/E2 stock. Please Note: We get...HKP-02653$19.95 -
H&K HK MR556/416 Receiver End Plate
H&K Heckler & Koch
$14.95HK 416, MR556 End Plate For Receiver & Buffer TubeFits all HK MR556 & HK 416 upper receiever/buffer tubes. New HK German manufacture.HKP-16603$14.95 -
H&K HK MR556/416 Firing Pin
H&K Heckler & Koch
$54.95H&K HK MR556 & 416 Firing Pin New HK German manufactured. This is a great item to have on hand as the firing pin is one of the most abused components in the HK MR556 and HK 416 weapon systems. Compatible With: HK MR556 HK 416 HK...HKP-00045$54.95 -
H&K HK MR556/MR762/416/417 German E1 Convex Butt Pad
H&K Heckler & Koch
$64.95HK MR556, HK416 & MR762, HK417 German E1 Convex Butt Pad The HK Convex buttpad can be used to swap out on the factory E2 or concave-style buttpads for those who desire this option. This way, you can use the concave or convex-style buttpads...HKP-01915$64.95 -
H&K HK MR556/MR762/416/417 33mm Front Folding Sight
H&K Heckler & Koch
$149.9533mm Front Folding Sight Tower-MR416, MR762 & HK416/HK417 HK 416 Or MR556 Front Folding Sight. This item attaches directly to the front gas block of the HK 416 & MR556 or MR762/HK417. Designed to be used in conjunction with - Flip Up Rear...HKP-02548$149.95