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.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
On Sale
HK UMP Caliber Conversion to .40 S&W Kit - 7.87" Barrel - 30 Round Magazine
Michaels Machines
Now: $637.47Was: $999.95HK UMP 40 Caliber Conversion Kit With this UMP Conversion kit, UMP .45 sub guns can be converted to .40 caliber. Machined bolt carriers are available for USC/UMP conversion sub guns. This is a simple...HKP-18754Now: $637.47Was: $999.95 -
Out Of Stock
HK21 Locking Piece - 50 Degree
H&K Heckler & Koch
$149.95H&K HK21 (7.62x51/.308) Locking Piece - New Factory, Old Stock The HK21 standard 50-degree locking piece. Each LP includes the hardness "dot" to identify them as HK 21 locking pieces.HKP-01745$149.95 -
HK21E, HK23E Backplate
H&K Heckler & Koch
$289.95H&K 21E/23E(7.62x51/.308) & (5.56/.223) Backplate These factory German HK21E/23E back plates are no longer in production. Grab yours before they are gone for good!HKP-00241$289.95 -
Semi-Auto SEF Trigger Group - .308
H&K Heckler & Koch
$549.95HK German SEF SEMI .308 Clipped & Pinned Trigger Group The new HK German-made semi-auto trigger group comes in .308 caliber already clipped & pinned. Compatible With:HKP-00210-CP$549.95 -
HK91, G3 4 Position (0,1,3,F Pictogram) Trigger Housing - Push Pin
H&K Heckler & Koch
$459.95H&K 91/G3 (7.62x51/.308) 4 Position (0,1,3,F Pictogram) Trigger Housing - Push Pin This authentic German HK trigger housing features a 4 position pictogram (0,1,3,F) and is designed for push pin...HKP-17823$459.95 -
Out Of Stock
HK91, G3 Trigger Group (0,1) - 2 Position - Safe / Semi Only
HKP HK Parts
$429.95G3, 91, PTR Trigger Group 2 Position Housing 0,1- Safe, Semi Only Finally a lower cost alternative to the spendy & rare all-German HK FBI or 0,1 ambidextrous trigger group in a 2 position factory...HKP-17235$429.95 -
On Sale
HK51, PTR PDW Stock - AR15 Style
PTR
Now: $216.72Was: $339.95HK51, PTR PDW Magpul Stock - AR-15 Style AR15/M16 to HK 90 series stock adapter for the HK51 and PTR PDW. This is a perfect compliment for those that want to use the popular Magpul Moe stock. Each...HKP-15753Now: $216.72Was: $339.95 -
On Sale
HK MP5, HK94, HK33, HK53, HK93 Stock - AR15 Style
HKP HK Parts
Now: $126.19Was: $197.95HKP HK Parts AR-15 Style Magpul Stock for HK33, HK53, and HK93 - 5.56 / .223 US manufactured AR15 to HK33, HK53, HK93 series stock assembly with Magpul MOE stock. Each unit comes complete and ready...HKP-16271Now: $126.19Was: $197.95 -
HK MP5 Trigger Housing - SEF Navy Style - .40 S&W, 10mm
H&K Heckler & Koch
$99.95 - $179.95H&K MP5 40/10 SEF Navy Style Trigger Housing A perfect upgrade for your HK MP5 40/10 build. This is the only SEF-style housing available for the MP5 40/10 family of firearms. Each housing is...HKP-00445$99.95 - $179.95 -
HK MP5K Trigger Group, Complete - 4 Position Semi Only - Clipped and Pinned
H&K Heckler & Koch
$1,499.95MP5K Semi Only 4 Position Trigger Group Complete With Safe, Semi functions only but provides the look and feel of the four position (0,1,3, F) housing. New HK German.HKP-00185$1,499.95 -
HK MP5K Trigger Group - Navy SEF Semi Auto - Clipped and Pinned
H&K Heckler & Koch
$599.95HK Heckler and Koch Navy Style SEF Semi Trigger Group - C/P for HK MP5K HK German manufactured parts. Each unit comes with the professionally converted SEF navy style SEF clipped and pinned housing...HKP-18055$599.95 -
Out Of Stock
Re-Timed Hammer for Registered Sear Packs - Belt Fed
Michaels Machines
$198.95MM Registered Sear Pack - Re-Timed Hammer - Belt-Fed Billeted re-timed Hammer that has been professionally re-timed by Michael's Machines for belt-fed HK firearms with registered sear packs. A one...HKP-16996$198.95