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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HK91, G3, PTR Trunnion
RCM
$64.95RCM Trunnion For The HK91/G3 Series - US Made This part is machined from ordnance grade 9310 enhanced steel and heat treated to exact HK specifications. This item is the best USA-made trunnion on the market. Machined to spec and are to the custom ground...HKP-01289$64.95 -
HK P30L, P30LS Compensator V2 - Quick Detach
HKP HK Parts
$149.95HKP Quick Detach Compensator V2 for HK P30L and HK P30LS 9mm and .40 S&W Easy on, easy off - Quick Detach technology. The HK Parts P30L Comp Weight™ is the world's first quick detach Comp Weight™, compensator. That slides effortlessly...HKP-18083$149.95 -
HK VP9SK Tactical Complete Recoil Spring Assembly
H&K Heckler & Koch
$106.99HK German VP9SK - Recoil Spring Assembly Complete New recoil spring assembly for all HK VP9SK models. Made in Germany. Compatible With: HK VP9SK Tacticalhkp-18384$106.99 -
HK MP5 Folding Stock with HK Parts Adapter
B&T Brugger & Thomet
$277.95B&T Folding Stock for All MP5 Full Size Variants Swiss made B&T folding stock completely assembled With our own HK Parts stock adapter. CNC machined aircraft grade aluminum with QD sling attachment point. Compatible With: MP5 (NOT...HKP-20216$277.95 -
HK P2000SK Compensator
HKP HK Parts
$189.95HKP HK P2000SK Compensator The HK Parts P2000SK Compensator will add a sleek and tactical look to your P2000. With the quick and easy addition of our compensator you will add plenty of benefits. This compensator reduces recoil and therefore allows you...HKP-20885$189.95 -
HK21E, HK23E Locking Piece #9 - 40 Degree
RCM
$49.95Locking Piece #9 - 40 Degree - US Made Compatible With: HK 21e HK 23eHKP-02521$49.95 -
HK MP5SD Bolt Group, Complete - 9mm
RCM
$409.95Complete Bolt Group - RCM - HK MP5SD 9mm Ideal to replace out of spec, worn or broken bolt groups or for that custom build. Each bolt group will work and fit on semi or full auto MP5SD 9mm style firearms. This is the finest US BCG available...HKP-19665$409.95 -
Out Of Stock
HK USP Magazine - .45 ACP - 10 Round - Standard Floorplate
H&K Heckler & Koch
$54.9510 Round HK USP .45 ACP Magazine w/ Standard Floor Plate Perfect for those who live in states that require 10-round magazines or those that compete and require a 10-round-only magazine. Compatible With: HK USP 45 Full Size HK USP Tactical 45 HK Elite...HKP-02366$54.95 -
HK MP5K, SP5K Folding Stock - 10"
Zenith
$99.95Zenith HK MP5K, SP5K, SP89 Folding Stock Folds to the side for compact storage while providing a solid, stable shoulder stock when deployed. No modifications required on in-spec MP5K receivers. Specifications: Polymer and fiberglass reinforced Weight:...HKP-22419$99.95 -
HK45 Straight Trigger
Grayguns
$94.95Grayguns HK45 Straight Trigger The Grayguns HK45 straight trigger is a first-of-its-kind in the market. The trigger reduces over-travel while featuring a 90 degree optimal trigger break. Crafted in the US from heat-treated tool steel to...HKP-21496$94.95 -
HK G36, SL8 Locking Push Pin for Handguards, Lowers, Magwells
GSG9
$18.95HK G36, SL8 Push Pin For Forearm, Magwell, & Lower Each push pin/locking pin retains the forearm, magwell, & lower to the upper receiver. Each G36 style firearm uses a total of 3X of these push pins. Compatible With: G36 G36K G36C G36...HKP-18221$18.95 -
HK MP5 A3 Retractable Buttstock - Surplus - Good Condition
H&K Heckler & Koch
$617.95Military German manufactured A3 Retractable Stock - Used Each Used German HK stock will vary from Fair-Good Shape (early 80's manufacture) A one-time offering of some well used German military stocks that need some TLC and a refinish to get them looking...HKP-16659$617.95