Parts
At HK Parts, we offer a wide range of high-quality Heckler and Koch accessories and components for your favorite firearms. Whether you are upgrading a Heckler and Koch pistol or rifle, or building with parts kits, we have you covered. Explore top-rated components for VP9, USP, P30, MP5, MP5K, G36, HK416, and more. From triggers, barrels, and grips to magazines, stocks, and sights, find the parts you need to enhance performance, reliability, and function.
Popular upgrades include match triggers, threaded barrels, compensators, optic plates, and extended magazines. Rifle owners often add enhanced stocks, forearms, and ambidextrous controls.
MP5 and MP5K kits are top sellers, giving shooters authentic components for iconic builds. G36 and HK416 kits are also highly sought after by collectors and professionals alike.
HKP offers the world’s largest H&K-focused catalog, with better availability, faster fulfillment, and expert support compared to general retailers.
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HK G36 Brass Catcher - OD Green
H&K Heckler & Koch
$567.95Heckler and Koch HK G36 Brass Catcher - OD Green Genuine HK brass catcher for G36 platforms. This brass catcher is equipped with a quick-change, integral magwell for a secure fit. Spent brass capacity is approximately 60 cases. Compatible...HKP-18490$567.95 -
Out Of Stock
HK SEF Selector Lock Out Safety Key
H&K Heckler & Koch
$0.00H&K SEF Selector Lock Out Safety Key You must have a special lever to use this tool. Compatible with all SEF lockout selectors.HKP-01482$0.00 -
Out Of Stock
HK MP5 Trigger Housing - Navy 3 Position - Ambidextrous - Incomplete
H&K Heckler & Koch
$0.00H&K 3 Position (0,1,3,F Pictoogram) Ambidextrous Navy Style Incomplete Trigger Housing This factory correct HK German trigger pack is a rare find and an excellent spare for your HK ambidextrous Navy trigger group. Featuring the 3 position pictogram...HKP-13482$0.00 -
HK MP5 Lower Parts Kit - A3 - 4 Position - Ambidextrous
H&K Heckler & Koch
$4,399.95HK German MP5 9mm Used Parts Kit Complete (Minus Receiver Of Course) 100% GERMAN PARTS All MP5 Kits: HK 3-Lug MP5 Barrel - cold hammer forged Cocking Tube Front Sight Tower Wide Forearm - Black Bolt Group - MP5 Full Auto Push Pins - 1...HKP-01301$4,399.95 -
Out Of Stock
HK416, MR556 Upper Conversion Kit - Threaded 1/2x28, - 5.56x45 / .223
HKP HK Parts
$699.95H&K MR556 & HK416 (5.56x45/.223) Upper Conversion Kit - Threaded 1/2x28 Finally an answer for all of those that have been wanting a 14.5" upper for an HK416 or MR556. This conversion kit adds an upper or a barrel option for your MR556, CR556...HKP-17877$699.95 -
Out Of Stock
HK417, MR556, MR762 Trigger Guard - A5 Style - RAL8000
HKP HK Parts
$39.95HKP HK 416 A5 Style Trigger Guard - MR556/416/MR762/417 - RAL 8K Compatible With: MR556 & 416 MR762 & 417HKP-17832$39.95 -
On Sale
HK416, MR556 Quad Rail - Short - KeyMod
HKP HK Parts
Now: $159.95Was: $199.95MR556/416 KeyMod Quad Rail - ShortHKP-17985Now: $159.95Was: $199.95 -
Out Of Stock
HK416, MR556 H-Key Complete Short Handguard - FDE
H&K Heckler & Koch
$0.00H&K HK MR556/416 H-Key Complete Short Handguard - FDE Slim line handguard with H-Key mounting slots, short. Compatible With: All 11", 14.5", 16.5", & 20" models HK MR556 HK 416/416 A5HKP-18696$0.00 -
Out Of Stock
HK416, MR556 H-Key Complete Short Handguard
H&K Heckler & Koch
$0.00H&K HK MR556/416 H-Key Complete Short Handguard Slim line handguard with H-Key mounting slots, short. Compatible With: All 11", 14.5", 16.5", & 20" models HK MR556 HK 416/416 A5HKP-18611$0.00 -
Out Of Stock
HK416, MR556 Upper Conversion Kit - 9" - HK416C Style
HKP HK Parts
$899.95MR556 and HK416 Upper Conversion Kit - 9" - HK 416C Style Finally an answer for all of those that have been wanting as close to the original, rare unicorn of a find HK 416C 9" barrel conversion kit for 416 or MR556. Each conversion kit upper or barrel...HKP-18674$899.95 -
HK MR556, MR762 Buttstock Release Lever
H&K Heckler & Koch
$9.95H&K HK MR556/MR762 Buttstock Release Lever Compatible With: HK MR556 HK MR762HKP-16621$9.95 -
Out Of Stock
HK416, MR556 Barrel Conversion Kit - 9" - HK416C Style
HKP HK Parts
$0.00MR556 & HK416 Barrel Conversion Kit - 9" - HK 416C Style Finally an answer for all of those that have been wanting as close to the original, rare unicorn of a find HK 416C 9" barrel conversion kit for 416 or MR556. Each conversion kit upper or barrel...HKP-18401$0.00