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
AR-15 Ambidextrous Forced Reset Selector (G-LEVER) - Geissele Compatible
Atrius
Now: $241.95Was: $269.00AR-15 Ambidextrous Forced Reset Selector (G-LEVER) - Geissele Compatible Atrius Development forced reset selectors for Geissele triggers. Enables the user to select from 3 positions; SAFE, SEMI (Traditional) and SUPER-SEMI.The G-LEVER is an...HKP-22550Now: $241.95Was: $269.00 -
On Sale
HK CC9 +3 Magazine Extension Kit with Pinky Rest - 9mm
HKP HK Parts
Now: $39.95Was: $49.95HKP HK CC9 +3 Magazine Extension +3 magazine extension for the HK CC9. This low-profile base pad increases a standard 12-round CC9 magazine to 15 rounds. Machined in the U.S. from aircraft-grade hard-coat anodized aluminum with steel hardware...HKP-22476-MNow: $39.95Was: $49.95 -
On Sale
HK MP5 Handguard Conversion - SD Style - MLOK
HKP HK Parts
Now: $259.95Was: $324.95HKP HK MP5 SD Handguard Conversion - M-LOK Transform your standard MP5 into the classic SD-style with the HKP MP5 SD handguard conversion. This drop-in handguard is designed solely for aesthetics, providing your MP5 with the distinctive suppressed SD...HKP-22200Now: $259.95Was: $324.95 -
On Sale
HK91, G3, PTR Magazine - 10 Round - Steel - BLEMISHED
H&K Heckler & Koch
Now: $56.95Was: $89.95H&K 91/G3/MSG90 (7.62x51/.308) 10 Round Magazine - Steel - BLEMISHED MAGAZINE BODY HAS PITTING - CONDITION AND COLOR MAY VARY (see pictures) - Price is per unit. COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT...HKP-01607-BNow: $56.95Was: $89.95 -
HK VP9 Optic Plate - Holosun 509T - Red Dot Pistol Mount
H&K Heckler & Koch
$50.95H&K VP9 509T Optic Plate This precision-machined mounting plate allows secure attachment of the Holosun 509T red dot sight to the H&K VP9 optics-ready slide. Built from durable materials, it ensures proper fitment, alignment, and reliable...HKP-21913$50.95 -
On Sale
HK UMP, USC Extended Handguard
HKP HK Parts
Now: $199.95Was: $249.95HKP UMP/USC Extended Handguard - Black Cerakote The HK Parts UMP extended handguard is the ultimate choice for your UMP or USC. M-LOK attachment points and a robust picatinny rail on the extended section provide accessory mounting points for any loud-out...HKP-21679Now: $199.95Was: $249.95 -
On Sale
HK P30 Fluted Barrel - 9mm - 4.5" - Threaded 13.5x1
HKP HK Parts
Now: $206.95Was: $229.95HKP P30 9mm Fluted Barrel - Threaded 13.5x1 Made from ordnance grade steel, heat treated, and finished with durable nitride. Each fluted barrel includes an O-ringed thread protector that will not loosen or fall off during range sessions...HKP-21443Now: $206.95Was: $229.95 -
On Sale
HK416, MR556 Battlesight Set - Folding - 45 degree Offset
Troy Industries
$225.95 - $238.95HK 416 / MR556 - 45⁰ OFFSET BATTLESIGHT SET – HK FRONT & ROUND REAR Durability and dead-on accuracy have made Troy Industries Folding BattleSights the choice of Special Ops and tactical users worldwide. The TROY 45 Degree Folding...HKP-21289-M$225.95 - $238.95 -
On Sale
HK V51 Backplate
HKP HK Parts
Now: $99.95Was: $167.95HKP V51 Backplate HK Parts brings you a long lost part that was no longer available till now. The Vector Arms V51 firearms was one of the most aclaimed PDW of its time but replacement parts have become difficult to source. We now take like new G3...HKP-21201Now: $99.95Was: $167.95 -
On Sale
HK45C, P30 Holster - EV2 AIWB
Comp-Tac
$50.95 - $53.95Comp-Tac HK P30/HK45C EV2 AIWB Holster The eV2 Holster is designed for easy as well as deep concealment in the Appendix Inside the Waistband (AIWB) position. The eV2's holster body is made of 100% aircraft-grade Kydex® which provides the smoothest...HKP-19413-M$50.95 - $53.95 -
Out Of Stock
HK USPC, USPC Tactical Barrel - .45 ACP - 4.47" - Threaded 16x1 LH
RCM
$250.00RCM HK USPC .45 ACP Barrel - Threaded 16x1 LH HK USPC .45 ACP & HK USPC Tactical .45 ACP barrel with 16x1 threaded design, compatible with various flash hiders and sound suppressors. Unlike the factory USPC Tactical .45 ACP barrel with metric 16x1...HKP-20129$250.00 -
HK MP5 Folding Stock with HK Parts Adapter
HKP HK Parts / Heckler & Koch
$269.95German Folding Stock with HK Parts Adapter - MP5 German folding stock with MP5 HK Parts Adapter. The HK Parts adapter offers a QD attachment point and is made from hard coat anodized aluminum. Compatible With: MP5 (NOT compatible with MP5 .22...HKP-19453$269.95