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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On Sale
HK416, MR556, HK417, MR762 Handguard Locking Screw - Stainless
HKP HK Parts
Now: $7.95Was: $9.95HKP HK Parts Handguard Locking Screw - Stainless for HK416, HK MR556, HK417, and HK MR762 Replacement handguard locking screw that secures the handguard to the upper receiver. Made in USA from 17-4 SS with a 5mm hex head. Compatible With: HK...HKP-17657Now: $7.95Was: $9.95 -
On Sale
HK MP5, MP5K Cocking Handle - Knurled - Extended
Leapers - UTG
Now: $26.95Was: $29.97HK MP5, MP5K Cocking Handle Extended Extended cocking handle for the MP5 style of firearms. These cocking handles also count towards one US made component for 922r compliance. Made by UTG to work with their monolithic M-LOK handguards...HKP-22421Now: $26.95Was: $29.97 -
On Sale
HK VP9SK, P30SK Magazine Extension - Pinky Rest - +1
HKP HK Parts
Now: $15.95Was: $19.95HKP +1 HK VP9SK/P30SK Magazine Extension w/ Pinky Rest VP9 SK & P30 SK magazine extension or floorplate that adds an additional round to the 10 round magazine (11 rounds total). The mag extension also provides a pinky rest that is super well balanced...HKP-17880Now: $15.95Was: $19.95 -
HK MP5, HK90 Series Roller Locking Plate - Original Style
H&K Heckler & Koch
$43.95New HK German Roller Retainer Plate for Rollers Original-style roller locking plate. This item is a common wear item that is great to have on hand as they are one of the top items that break or fail with use. Compatible With: MP5*** MP5K SP89,...HKP-00065$43.95 -
On Sale
HK MP5, HK90 Series Trigger - SEF, 0,1 - Billeted - USA
HKP HK Parts
Now: $35.95Was: $45.95HKP HK Parts USA made Billeted Trigger for the HK MP5 and HK90 Series HKP US 90 Series trigger made from the best quality billet steel. It will fit all 0,1, and SEF-style trigger packs. Each part counts as one US-made compliant part needed for...HKP-00380Now: $35.95Was: $45.95 -
On Sale
JMAC Universal HRD M-LOK Handstop
JMAC Customs
Now: $41.95Was: $49.95JMAC Custom HRD M-LOK Handstop (H)and(R)etention(D)evice Compact, lightweight, and reversible. Features: M-LOK Compatible Fits in and across M-LOK Slots Includes mounting hardware 7075 T6 Aluminum Hard Coat Anodized The quarter-turn T-slot nuts have...HKP-21235Now: $41.95Was: $49.95 -
On Sale
HK SEF Short Axle Selector Lever For Metal Trigger Housings Only - Used
HKP HK Parts
Now: $7.95Was: $9.95HKP SEF Short Axle Selector Lever For Metal Trigger Housings Only - Used Compatible with all metal HK grip frames. Please Note: The polymer (plastic) style SEF housing uses the longer axle SEF selector lever, not this product offering.HKP-00120Now: $7.95Was: $9.95 -
On Sale
HK51, PTR PDW A3 Telescopic Stock
MKE
Now: $413.95Was: $459.95MKE HK51, PTR PDW Telescopic Stock A3 Factory new MKE stock professionally converted to fit HK51 and PTR PDW rifles and pistols. This stock was modified with a heavy profile collapsing rod insert heat treated for longevity. The correct collapsing length...HKP-21376Now: $413.95Was: $459.95 -
Out Of Stock
HK G36, G36C, G36K 30 Round Magazine
HKP HK Parts
$38.95HK G36 30 Round Magazine HK Parts 30-round magazine designed to fit all G36, G36K, and G36C variants, and SL8's with the G36 magwell conversion. These magazines are top-quality and proudly made in the U.S. Compatible With: G36, G36K, G36C SL8...HKP-22525-M$38.95 -
On Sale
HK SP5 and SP5K Spec. Clipping and Pinning Service for Polymer Lower Housings
HKP HK Parts
Now: $79.95Was: $99.95HK Clipped and Pinned Service - For Polymer Grip Frames to SP5 SPEC At HK Parts we offer our own HK trigger housing clip and pin services. No one does a better job with quicker turn around then we do. We will clip and pin any "push pin" plastic housing...HKP-19989Now: $79.95Was: $99.95 -
On Sale
HK MP5, MP5SD Cocking Tube Support - Universal - Steel
HKP HK Parts
Now: $51.95Was: $64.95MP5SD, MP5 Universal All Steel Cocking Tube Support 9mm - USA Made from ordnance grade stainless steel from the factory HK German print & specs. An HK German quality part at a great price point. Each MP5 9mm cocking tube support will include the...HKP-18089Now: $51.95Was: $64.95 -
HK91, G3, PTR Central Buttstock Section - OD Green - Used
H&K Heckler & Koch
$5.99H&K HK G3, HK 91, PTR Central Buttstock Section - OD Green - Used USED German G3, 91, PTR Central Butt stock Section- Green in color. This stock section is no longer being manufactured as the HKG3, HK91 are out of production. Each surplus section is...HKP-17139$5.99