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 MP5N Barrel - 9mm - 8.85" - Threaded 1/2x32 with 3 Lug
RCM
$179.95RCM HK MP5N 9mm Barrel - Threaded 1/2x32 - 3-Lug This MP5N barrel delivers exceptional value, crafted from premium Cold Hammer Forged Steel and treated with a durable nitride process. It easily accommodates suppressors and other muzzle attachments. Brand...HKP-16967$179.95 -
HK MP5SD Cocking Tube - 9mm - Left Hand
HKP HK Parts
$99.95MP5SD Cocking Tube - US Made - For Left-Handed Shooters HK German MP5SD spec cocking tube for use on MP5SD style builds or custom SD builds. Each unit is made from the original factory HK prints & tooling to the perfect HK MP5SD "F" style specs...HKP-18918$99.95 -
Out Of Stock
HK MP5 4 Position Burst Trigger Group 0,1,3,F - USED
H&K Heckler & Koch
$2,599.95H&K MP5 4 Position Burst Trigger Group 0,1,3,F - USED HK German 4 Position 3 Round Burst Trigger Group – complete and ready for use. This is a high-quality, fully functional trigger group featuring a versatile 4 Position Burst (0, 1, 3, F)...HKP-02610$2,599.95 -
HK MP5 Navy Trigger Group - 3 Position (0,1,Full) - With ESSL
H&K Heckler & Koch
$2,549.95HK MP5 3 Position Navy T/G (0, 1, Full) With Extended Safety Selector Lever New factory German complete trigger group with the left side extended lever. No longer available and just a few units remaining. Compatible With: HK MP5HKP-00159$2,549.95 -
On Sale
HK91, G3, PTR Magazine - 20 Round - Steel - USED
Rheinmetall
Now: $24.95Was: $34.95Rheinmetall HK91, G3, PTR Magazine - 20 Round - Steel - USED VARYING CONDITION SHOWN - SOLD INDIVIDUALLY DENTS AND PITTING USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. G3 steel mags were made for the...HKP-22495-USEDNow: $24.95Was: $34.95 -
HK MP5K, AP5-P Rear Sight Drum
MKE
$28.95MKE MP5K & AP5-P Rear Sight Drum Factory MKE manufactured rear sight drum for the Century AP5-P. Compatible With: HK MP5K Century AP5-P, AP5-M HK SP89 HK SP5K In-spec clones and custom buildsHKP-22480$28.95 -
On Sale
HK416, MR556 Handguard - A4 Style - 10" - USED
H&K Heckler & Koch
Now: $379.95Was: $479.95H&K HK416, MR556 A4 10" Quick Disconnect Handguard Factory HK A4 handguard featuring HK's A4 quick disconnect latch. Compatible with A1 and A4 rifles. THESE HANDGUARDS ARE SLIGHTLY USED AND WILL HAVE COSMETIC BLEMISHES. PLEASE REFER TO...HKP-22426-USEDNow: $379.95Was: $479.95 -
HK MP5, SP5 Folding Stock - 11"
Zenith
$99.95Zenith HK MP5, SP5 Folding Stock Folds to the side for compact storage while providing a solid, stable shoulder stock when deployed. No modifications required on in-spec MP5 receivers. Specifications: Polymer and fiberglass reinforced Weight: 14.4...HKP-22420$99.95 -
On Sale
HK MP5, HK91, G3, PTR Magazine - 5 Round - Black - BLEMISHED
HKP HK Parts
Now: $44.97Was: $79.95HK91, G3, MSG90 Magazine - 5 Round - Black - BLEMISHED PITTING COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. 5 Round German Steel 308 Magazine With US Made...HKP-16250-BL-BNow: $44.97Was: $79.95 -
Out Of Stock
HK VP9, P30 Magazine Base Pad - Hard Duty
Grayguns
$22.00The Grayguns HK VP9 and P30 Magazine Base Pads are designed for hard-duty use. The base pads are manufactured from 6061 Aluminum and professionally finished with MIL-A-8625 Type III anodized coating. Pads go through a glass-beading process...HKP-22344$22.00 -
On Sale
HK45C Railok™ Threaded Barrel Compensator - BLEMISHED
HKP HK Parts
Now: $96.95Was: $189.95HKP HK45C Railok™ Threaded Barrel Compensator - BLEMISHED ACTUAL UNIT MAY HAVE MARKINGS THAT DIFFER SLIGHTLY FROM THE ONE PICTURED. COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL...HKP-21264-BNow: $96.95Was: $189.95 -
HK USP45 Tactical MOD 1 Threaded Barrel Compensator
HKP HK Parts
$179.95HK Parts MOD 1 Compensator for Threaded Barrel: H&K USP Tactical .45 ACP The HK Parts MOD 1 compensator perfectly blends form and function, setting a new standard in muzzle control. Experience a significant reduction in muzzle flip and recoil,...HKP-22262$179.95