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
HK Roller Retainer Spring - Action 3 - BLEMISHED
H&K Heckler & Koch
Now: $4.95Was: $6.74HK Roller Retainer Spring - Action 3 - BLEMISHED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Second-generation roller holder. Each retainer...HKP-00068-BNow: $4.95Was: $6.74 -
On Sale
HK MP5K, SP5K Locking Piece #16 - 110 Degree - USED - GUNSMITH SPECIAL
H&K Heckler & Koch
Now: $14.95Was: $44.95HK MP5K, SP5K Locking Piece #16 - 110 Degree - USED - GUNSMITH SPECIAL Please Note: Will require work before being functional. HKP recommends the work be performed by a professional gunsmith. The Condition will vary from part-to-part vs. the pictured...HKP-19769-BNow: $14.95Was: $44.95 -
HK VP9CC Screw For Cover Plate (Set of 2)
H&K Heckler & Koch
$5.95HK VP9CC Screw For Cover Plate Screw set for securing the optic cover plate on Heckler and Koch VP9CC pistols. Available as a set of 2 screws. Compatible With: VP9CCHKP-22744$5.95 -
Out Of Stock
HK MP5, SP5, MP5K, SP5K Flash Hider - 3-Lug - 9mm
HKP HK Parts
$99.95Heckler and Koch MP5 SP5 MP5K SP5K Flash Hider 3-Lug 9mm Flash hider designed for Heckler and Koch MP5, SP5, MP5K, and SP5K platforms in 9mm caliber. Used to reduce muzzle flash signature during firing. Compatible With: - MP5, SP5 - MP5K, SP5K - In-spec...HKP-22788$99.95 -
HK MP5, HK94 A3 Retractable Buttstock - Factory - Used
H&K Heckler & Koch
$679.95Heckler and Koch MP5 HK94 A3 Retractable Buttstock Retractable buttstock designed for MP5 and HK94 models. Provides adjustable shoulder support and improved handling. - MP5 A3, MP5A3 - HK94 A3 - In-spec clones and custom buildsHKP-22785$679.95 -
On Sale
HK G36 Mounting Rail Carry Handle - Portuguese Version
B&T Brugger & Thomet
Now: $119.95Was: $149.95HK G36 Mounting Rail Carry Handle, Portuguese Version Swiss-made B&T G36 mounting rail designed for the HKG36 carrying handle, based on the Portuguese military configuration. Manufactured by B&T Switzerland this rail delivers exceptional quality...HKP-99446Now: $119.95Was: $149.95 -
On Sale
UZI Lower Grip, Incomplete - A.R.S - USED
IMI
Now: $97.95Was: $189.95IMI UZI Complete A.R.S Lower Grip - Incomplete - USED VARYING CONDITION SHOWN - SOLD INDIVIDUALLY INCOMPLETE - MISSING SELECTOR LEVER AND BROKEN GRIP Israel manufactured complete lower grip. Each grip in is good condition and show signs of wear. Please...HKP-99193-USEDNow: $97.95Was: $189.95 -
On Sale
HK21E, HK11A1, HK11E Barrel With Grip - 17.7"
Michaels Machines
Now: $1,330.95Was: $1,478.95MM HK21E, HK11A1, HK11E Barrel - 17.7" Michael's Machines HK21E barrels are crafted in the US from 41V50 CHF blanks and fully nitrided for optimal corrosion resistance. Barrels come complete, drop-in ready with a new factory flash hider and fully...HKP-22540Now: $1,330.95Was: $1,478.95 -
On Sale
HK MP5K, AP5-P Trunnion - 9mm
MKE
Now: $63.95Was: $79.95HK MP5K Trunnion Made to exact factory HK specifications for the HK MP5K type builds. Machined to HK spec making the install painless and hassle free. Compatible With: MP5K In spec clonesHKP-22522Now: $63.95Was: $79.95 -
On Sale
HK MP5, 90 Series, AP5 Trigger - BLEMISHED
MKE
Now: $22.95Was: $34.95MKE AP5, HK MP5, 90 Series Trigger - BLEMISHED VARYING CONDITION SHOWN - SOLD INDIVIDUALLY COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Steel trigger...HKP-22519-BNow: $22.95Was: $34.95 -
On Sale
HK91, G3 A2 Stock - Tan - Saudi Contract - Enhanced Heavy Buffer - Like New - Rare
Other
Now: $219.95Was: $274.95Rare Saudi Arabian Contract HK91, G3 A2 Stock with HKP Enhanced Heavy Buffer - Tan - Like New VARYING CONDITION SHOWN - SOLD INDIVIDUALLY Original Saudi Arabian contract G3 A2 fixed stock in tan paired with the HKP enhanced heavy buffer for improved...HKP-99420Now: $219.95Was: $274.95 -
On Sale
HK MP5, 90 Series, AP5 Trigger
MKE
Now: $29.95Was: $34.95MKE AP5, MP5, 90 Series Trigger Steel trigger manufactured in Turkey for HK 90 Series roller-delayed firearms. Designed as a replacement component for compatible MP5 and related platforms. Compatible With: MP5, MP5K, MP5K-PDW, MP5SD SP5, SP5K, SP5K-PDW,...HKP-22519Now: $29.95Was: $34.95