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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Promag HK 93/53/33 (5.56 / .223) 30 Round Magazine
Promag
$25.99HK93, HK33, HK53 - 30 Round Magazine - USA These magazines count as 3 US-made compliant parts for those who need to maintain 922r compliance. Compatible with all 5.56, .223, & .300 AAC Blackout calibers. Each magazine body, follower, and...HKP-13969$25.99 -
H&K HK MR556/416 Ejection Port Cover - Black
H&K Heckler & Koch
$34.95HK German HK 416, MR556 Ejection Port Cover 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 project with the finest ejection port cover...HKP-15229$34.95 -
H&K HK G36C Rear Stock With Cheek Rest - Black
H&K Heckler & Koch
$199.95HK G36C Rear Stock With Cheek Piece Installed - German Genuine German Heckler & Koch G36 stock. The G36C stock is a full inch shorter than a standard G36 stock. This is an ideal stock for those wearing body armor, for those who are doing the SL8...HKP-00278$199.95 -
HK G36, HK SL8 Side Rail Factory HK - Black
H&K Heckler & Koch
$67.95HK Factory German G36 & SL8 Side Rail With Screws Up to two side rails can be used on a G36 UMP, one for each of the sides. Made from hard coat anodized aluminum. Compatible With: SL8 full size G36 full sizeHKP-01962$67.95 -
HK G36/SL8 (5.56/.223) Barrel Mandrel
$99.95Barrel Mandrel For Removal & Installation of HK G36 & SL8 Barrels The mother of invention comes the state-of-the-art H&K SL-8 and G-36 barrel wrench. Will fit everything from the 9" G-36c to the 20" SL-8. The barrel mandrel...HKP-02608$99.95 -
H&K HK G36C Rear Stock - Black
$106.99HK G36C Rear Stock HK G36C 9.5" rear stock assembly. One full inch shorter than the standard G36/G36K stock. Each G36C stock is compatible with all G36 variants. This is the preferred stock for average height end users. Compatible...HKP-18218$106.99 -
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 MR556/416 Buffer Retainer Pin
H&K Heckler & Koch
$3.95Buffer Retainer Pin For The HK MR556 & HK 416HKP-12704$3.95 -
HKP HK 93/53/33 (5.56 / .223) Extended Cocking Handle
HKP HK Parts
$49.95HKP HK 93, 53, & 33 (5.56 / .223) Extended Cocking Handle Extended cocking handle for the HK93/33/53 family of firearms. Each handle is designed with the looks of the HK21E/HK23E style extended cocking handle. All steel handles with an enhanced...HKP-00196$49.95 -
HKP HK G36/SL8 Family Armorer's Manual
HKP HK Parts
$19.95HK G36 & HK SL8 Family Armorer's Manualf This manual is the most comprehensive manual available for the G36 & SL8 family of firearms. The manual covers the G36 & SL8 family in-depth to include all aspects of history, origin, makeup,...HKP-00627$19.95 -
H&K HK MR556/416 Receiver End Plate
H&K Heckler & Koch
$14.95HK 416, MR556 End Plate For Receiver & Buffer Tube New HK German manufacture. Compatible With: HK MR556 & HK 416 upper receiever/buffer tubesHKP-16603$14.95 -
HKP HK UMP, G36 Selector Lever
HKP HK Parts
$8.95HK UMP & G36 Left Side Safety Selector Lever With Axle - Replacement selector for HK PARTS TRIGGER GROUP HK Parts selector lever for the left side of our own 2 position FBI U.S housing for the UMP pictogram lowers. Compatible With: U.S FBI 2...HKP-20180$8.95 -
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 HK416 A5 Factory German Extended Castle Nut
H&K Heckler & Koch
$71.95H&K HK416 A5 Factory German Extended Castle Nut Original HK Factory German steel 416 A5 Extended Castle Nut. Perfect for MR556, HK 416 A5 builds, or upgrades.HKP-19164$71.95 -
HKP 53 (5.56 / .223) Cocking Tube
HKP HK Parts
$99.95HKP 53 (5.56 / .223) Cocking Tube New cocking tube made in the US. Made to the exact HK specifications as the factory HK53 German cocking tube. This is the only factory-correct HK53 cocking tube available, as HK Germany does not offer this part...HKP-00197$99.95 -
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 416 Full Auto Ambidextrous 3-Position Selector Lever Kit
H&K Heckler & Koch
$139.95HK416 Full Auto Ambi Selectors Kit - German HK Each set comes complete with everything you will need to upgrade your HK 416 to an ambi selector lever set up. Factory correct German HK and all steel construction. Includes: 2 X selector levers 2 X roll...HKP-17552$139.95 -
H&K 53 Factory Recoil Spring
H&K Heckler & Koch
$14.95HK German HK53 Replacement Recoil Spring This is a hard-to-find part, and it's a must-have spare part for your HK53 firearm.HKP-02228$14.95 -
H&K HK 33 Slimline Forearm - OD Green
H&K Heckler & Koch
$59.95H&K HK 33 Slimline Forearm - OD Green Used German military surplus O.D green slimline forearm cut down to fit the HK 33. These are rare items only offered here at HK Parts. Each item is in good to excellent shape and will clean up nicely with a...HKP-20198$59.95 -
HKP HK UMP, G36 3 Position Selector - Right
HKP HK Parts
$8.95HKP HK UMP, G36 3 Position Selector - Right HK UMP & G36 right safety selector lever for all 3 position HK UMP & G36 lowers only.HKP-20179$8.95 -
H&K 33, 93 - Rear Sight Assembly Complete
H&K Heckler & Koch
$39.95HK 93 & HK33 Rear Sight Assembly Complete - Used This is the complete assembly, as it comes from HK for a 556/223 firearm.HKP-00706$39.95 -
H&K HK 416 Enhanced Firing Pin/Retaining Pin
H&K Heckler & Koch
$19.95HK 416 Firing Pin Retaining Pin- New Style This part is the newer style pin that is goldish, super hardened, and much less prone to wear and tear. The enhanced version is the most robust, easiest-to-use pin available. Compatible With: HK 416 AR15, M4...HKP-02658$19.95 -
Out Of Stock
H&K HK MR556/416 Bolt Catch
H&K Heckler & Koch
$59.95HK MR556 & 416 Bolt Catch New HK German manufacture. Compatible With: HK 416 HK MR556HKP-02542$59.95 -
Out Of Stock
Geissele HK MR556/416 14.5" Super Modular Rail System - FDE
Geissele
$549.95Geissele HK416, MR556 14.5" Modular Rail - Desert Dirt Color (DDC) 13.625" overall length Geissele HK 416, MR556 free float rail with HK 416 14.5" barrel and MR 556 16.5" barreled upper. This is a direct replacement item for your HK MR556 and 14.5"...HKP-16462$549.95 -
Out Of Stock
H&K HK G36 to AR-15 Mag Conversion Mag Well - Black
H&K Heckler & Koch
$0.00HK G36 To AR15, M4 Magazine Conversion Simply swap the magazine well from the G36 to this offering and you can then run AR15/M4 style magazine in your G36 or SL8/G36 conversion. Allows use of all AR15-M4 magazines in the G36 with this magwell adapter...HKP-17605$0.00 -
H&K HK MR556/416 Buffer Retaining Pin
H&K Heckler & Koch
$15.95HK 416 & MR556 Buffer Retaining Pin New HK German proprietary HK designed buffer pin unique to the HK 416 and MR 556 series. Compatible With: HK MR556 HK 416 HK M27HKP-02544$15.95 -
H&K 416 Ambi Sling Loop
H&K Heckler & Koch
$154.95H&K 416 Ambi Sling Loop Ambidextrous sling loop for a quick and easy carrying option. compatible with any sling that attaches via a sling hook. Intended for the HK 416 format but is compatible with any picatinny rail. PLEASE NOTE SLING IS NOT...HKP-20341$154.95 -
H&K 93/53/33 (5.56 / .223) SEF Complete Trigger Pack
H&K Heckler & Koch
$229.95HK German 33, 53, & 33K .556 Full Auto SEF Trigger Pack Complete Complete in 100% working order with all German HK parts and the factory-correct .223/308 hammer spring, ejector, and other parts. Used trigger pack with a brand new latest and greatest...HKP-00731$229.95 -
H&K HK MR556/416 Battle Grip Storage Cap Pin
H&K Heckler & Koch
$4.95H&K HK MR556/416 Battle Grip Storage Cap PinHKP-16861$4.95 -
H&K HK MR556/416 Mil-Spec Enhanced Buffer Tube
H&K Heckler & Koch
$254.95HK 416 & MR556 OTB (over the beach) Buffer Tube/Receiver Extension Each mil-spec buffer tube has built-in drainage holes in the rear of the tube and also on the bottom to maximize efficiency. Each buffer tube has ball-bearing rollers to tighten the...HKP-02716$254.95 -
H&K HK33/HK93 A2 Black Buttstock - Surplus
H&K Heckler & Koch
$99.95H&K HK33/HK93 A2 Black Buttstock - Surplus HK33 complete black buttstock assembly. Surplus good condition. In perfect working order but will have signs use. This is the original buttstock for the HK33A2. Compatible With: HK33 HK93 HK53 V33, 53,...HKP-20133$99.95 -
H&K HK 416 Flash Hider - Black
H&K Heckler & Koch
$19.95HK 416 Flash Hider - Black Threaded 1/2 X 28 for use on all HK 416, MR556, and other AR-style applications. Great flash hider to use to upgrade the MR 556 flash hider.HKP-01404$19.95 -
Out Of Stock
HKP HK MR556/416 Barrel Nut Installation/Removal Tool
HKP HK Parts
$59.95HK 416, MR556 Barrel Nut Installation & Removal Tool New US manufactured barrel nut removal and installation tool. Each tool has the provision installed to allow the use of an off the shelf 1/2" torque wrench to be used while removing and installing...HKP-17327$59.95 -
Out Of Stock
GSG9 HK G36 (5.56/.223) Incomplete Bolt Head
GSG9
$0.00G36 Incomplete Bolt Head - USA G36 bolt head allows the use of double stack magazines in your SL8 conversion to high-capacity G36, Magpul, or AR15 magazines.HKP-00802$0.00 -
H&K HK MR556/416 Slim Line Stock - Black
H&K Heckler & Koch
$249.95HK 416A5, HK 416, MR556 Slim Line Retractable Stock New from HK Germany the slim line retractable stock fits all commercial & milspec AR-15/M16 buffer tubes. Marked with the HK logo and issued on specialized HK 416, MR556 rifles. Compatible...HKP-16244$249.95 -
H&K HK MR556/MR762 Front Lower Receiver Locking Pin
H&K Heckler & Koch
$59.95HK MR556 Locking Pin With Spring Loaded Detent This part is the front (large) takedown pin with ball detent and locking mechanism installed. The idea behind this type of system is to decrease the movement of the upper and lower receivers and improve...HKP-02663$59.95 -
HK 33 Wide Forend Black - Surplus
USA
$99.95HK 33 Wide Forend Black - Surplus Surplus condition, with minor scratches and wear on the polymer exterior in very good shape overall. 11.5 inches long. The aluminum heat shielding is still intact, riveted to the inside of the handguard. Compatible...HKP-20132$99.95 -
H&K HK 416 Commercial Factory E1 Rear Stock - Black
H&K Heckler & Koch
$249.95H&K HK 416 Commercial Factory E1 Rear Stock - Black HK 416 factory German E1 Rear Stock latest HK German stock for all HK 416/MR556 rifles. This HK 416 HKE1 Buttstock fits Commercial buffer tubes (receiver extensions) for M4/AR15 type weapons. NO...HKP-15426$249.95 -
H&K HK MR556/416 Slim Line Stock - RAL 8K
H&K Heckler & Koch
$249.95HK 416A5, HK416 & MR556 Slim Line Retractable Stock - Ral 8000 New from HK Germany the slim line retractable stock fits all commercial & milspec AR-15/M16 buffer tubes. Marked with the HK logo and issued on specialized HK 416, MR556 rifles...HKP-17602$249.95 -
Surefire HK MR556/416 3-Prong Flash Hider - Black
Surefire
$174.95SureFire SF3P-556-1/2 X 28 Three-Prong Flash Hider- MR556 & HK 416 The advanced SureFire SF3P-556-1/2-28 three-prong flash hider, which fits M4/M16 weapons and variants with 1/2x28 muzzle threads, features a patent-pending design that greatly reduces...HKP-17261$174.95