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
HK91, G3 Magazine - 20 Round - LEO Laser Marked - Parkerized - BLEMISHED
H&K Heckler & Koch
Now: $41.95Was: $59.95Heckler and Koch 20 Round Rare LEO Laser Marked Steel Magazine for HK91 and HK G3 BLEMISHED ONLY 1 UNIT AVAILABLE - AS PICTURED POOR AND UNFINISHED LASER MARKING COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT...HKP-19333-BNow: $41.95Was: $59.95 -
HK21 FMP Ultimate Build Kit- Matching Numbers - Complete RCM Barrel
FMP HK CONTRACT
$3,748.95HK21 Complete Build Kit- Matching Numbers HK Parts brings you another exhaustive parts kit. Our numbers-matching Ultimate HK21 parts kit includes everything you need to resurrect an iconic classic and hit the range for belt-fed action. Kit includes...HKP-22539$3,748.95 -
On Sale
HK MP5 Wide Handguard - Pressure Pad - 16-Slot Rail - Rare - USED
Other
Now: $324.95Was: $449.95Rare Defiance HK MP5 Wide Handguard - Pressure Pad - USED VARYING CONDITION SHOWN - SOLD INDIVIDUALLY USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. Swiss-made rare MP5 handguard with pressure pad and...HKP-99435Now: $324.95Was: $449.95 -
HK MP5K, SP5K Trigger Group - Single Stage - SSTG
Magpul
$669.95SSTG Magpul trigger group The Single Stage Trigger Group is a blend between the past and future. The trigger pack begins life as a factory German trigger pack before being professionally converted into a semi-auto trigger pack. After the conversion, each...HKP-22522-M$669.95 -
Out Of StockOn Sale
HK MP5, MP5K Optic Mount - Raised - Picatinny - Black - BLEMISHED
HKP HK Parts
Now: $117.95Was: $164.95HK MP5, MP5K Optic Mount - Raised - Picatinny - Black - BLEMISHED DINGS - INSTALLATION MARKINGS COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. The HKP Raised...HKP-22219-BL-BNow: $117.95Was: $164.95 -
Out Of StockOn Sale
HK MP5, SP5K, HK33, HK53, HK93 Optic Mount - Raised - Aimpoint ACRO - BLEMISHED
HKP HK Parts
Now: $76.95Was: $119.95HK MP5, SP5K, HK33, HK53, HK93 Optic Mount - Raised - Aimpoint ACRO - BLEMISHED DINGS COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. HK Parts brings you one of...HKP-21484-BLK-BNow: $76.95Was: $119.95 -
HK MP5K, AP5-P End Cap - Incomplete
MKE
$27.95MKE MP5K, AP5-P - Incomplete MKE manufactured replacement end cap. This end cap does not include the buffer, hardware, or sling swivel. Compatible With: HK MP5K HK SP89 HK SP5K Century AP5-P, AP5-MHKP-22472$27.95 -
WOOX Angled Grip - M-LOK - AFG
WOOX
$88.95WOOX M-LOK Angled Grip Compact angled foregrip for M-LOK handguards, built with a reversible dual-wall structure and checkered texture for a secure, consistent support-hand index. Features: Flat-bottom design for added stability and...HKP-22465$88.95 -
A3 Tactical Picatinny Skelestock
JMK
$338.95 - $353.95A3 Tactical Picatinny Skelestock The A3 Tactical Skelestocks are fixed-length folding skeleton stocks meticulously machined from 6061 aluminum. An ambidextrous hinge enables it to fold either to the right or left, depending on the mounting...HKP-22410-M$338.95 - $353.95 -
HK416, MR556 CQC Pistol Grip - Walnut
JMK
$78.95JMK HK416, MR556 CQC pistol grip - Walnut The CQC pistol grip by JMK is crafted from CNC-machined black walnut. After machining, the grip is dyed to a uniform color and finished with a catalyzed satin seal. These grips are compatible with any firearm...HKP-22401-M$78.95 -
HK FMP G3 Early Type De-Milled Front End - No Cocking Handle Assembly
FMP HK CONTRACT
$68.95HK G3 - FMP Early Type De-milled Front End - No Cocking Handle Assembly Early style G3 front end with no hanger from de-milled FMP G3 parts kits. Perfect for custom builds. Includes: Cocking tube Trunnion Barrel pinHKP-22377$68.95 -
HK G3 Stock Cut Off Section - OD Green
FMP HK CONTRACT
$2.45HK G3 Stock Cut Off Section - OD Green De-milled G3 stock section. Manufactured by FMP on HK tooling. Compatible With: HK G3, HK91 In-spec. clones and custom buildsHKP-22376$2.45