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 USP .45 Compensator Replacement Rail Set - MOD 1
HKP HK Parts
$28.95HKP HK Parts HK USP .45 ACP Rail and Plate Insert - Replacement MOD 1 Insert Kit Replacement Picatinny rail and smooth plate inserts with hardware for the MOD 1 compensator. Compatible With: HK USP .45 ACP MOD 1 CompensatorHKP-22371$28.95 -
On Sale
HK417, MR762 Upper Receiver and Handguard - Flecktarn
H&K Heckler & Koch
Now: $1,340.95Was: $1,489.95HK417, MR762 Upper Receiver and 13.5" Handguard - Flecktarn Factory HK MR762 matching flecktarn upper receiver and 13.5" handguard. ONLY 3 SETS AVAILABLE AND WILL NOT BE RESTOCKED Compatible With: HK MR762 HK417HKP-99325Now: $1,340.95Was: $1,489.95 -
HK21E, HK11A1, HK11E Barrel - 7.62 / .308 - 17.7" - Threaded 15x1
Michaels Machines
$1,168.95MM 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 stripped, requiring a flash hider or muzzle device and barrel handle...HKP-22333$1,168.95 -
FN-FNS .40 S&W Pistol Magazine - BLEMISHED
FN
$79.95FN-FNS .40 S&W Pistol Magazine - BLEMISHED ONLY 1 UNIT AVAILABLE - AS PICTURED MAGAZINE ONLY COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Each magazine was...HKP-19741-B$79.95 -
HK MP5K, AP5-P Recoil Guide Rod - 9mm
MKE
$24.95MKE HK MP5K 9mm Recoil Guide Rod Incomplete recoil spring guide rod. Compatible With: MP5K MKE AP5-PHKP-22237$24.95 -
On Sale
HK416, MR556 9" Modular Rail System - Black - BLEMISHED
H&K Heckler & Koch
Now: $286.95Was: $399.95H&K HK MR556/416 9" Modular Rail System - Black - BLEMISHED ONLY 1 UNIT AVAILABLE - AS PICTURED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. HK German...HKP-17341-BNow: $286.95Was: $399.95 -
HK MP5 QD End Cap with Buffer - Black - USED
HKP HK Parts
$99.95HK MP5 QD End Cap with Buffer - Black - USED ONLY 1 UNIT AVAILABLE - AS PICTURED USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. With this MP5 QD end cap upgrade you will get a heavier buffer to...HKP-20118-BL-B$99.95 -
On Sale
HK USC (.45 ACP) Incomplete Trigger Housing - Gray - Used
H&K Heckler & Koch
Now: $29.95Was: $39.95H&K USC (.45 ACP) Incomplete Trigger Housing - Gray - Used ONLY 1 UNIT AVAILABLE - AS PICTURED Used HK German USC Lower Receiver Empty. German HK perfect for spare parts. You can choose gray or black. THIS CLOSEOUT PART IS NOT ELIGIBLE FOR RETURN,...HKP-16479-GY-BNow: $29.95Was: $39.95 -
HK VP9, VP9SK, VP40 Replacement Hex Button ONLY - Gold - BLEMISHED
HKP HK Parts
$24.95HKP HK VP9/VP9SK/VP40 Replacement Hex Button ONLY - Gold - BLEMISHED ONLY REPLACEMENT HEX BUTTON. DOES NOT INCLUDE SLIDE PLATE. CONDITION MAY VARY. COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE...HKP-18111-GD-B$24.95 -
HK CC9 Rear Sight - Black Out
H&K Heckler & Koch
$46.95H&K CC9 Rear Sight - Black Out Genuine H&K blacked out serrated rear sight for CC9 pistol. Provides a clear sight picture without rear dots. Compatible With: HK CC9HKP-22144$46.95 -
HK34 9mm Rifle Build Kit - Navy Binary
HKP HK Parts
$2,279.95HK34 9mm Rifle Build Kit - Navy Binary Just when you thought all permutations of roller-lock kits had been exhausted, HK Parts brings you the HK34 rifle kit. The HK34 strikes a balance between the shoot-ability of a pistol caliber with the versatility of...HKP-22075$2,279.95 -
On Sale
HK MP5 Trunnion - .40 S&W, 10mm - Factory - USED
H&K Heckler & Koch
Now: $297.95Was: $549.95H&K MP5 40/10 Factory Trunnion - USED ONLY 1 UNIT AVAILABLE - AS PICTURED Used genuine German trunnion with round guides. Compatible With: HK MP5 40/10 THIS CLOSEOUT PART IS NOT ELIGIBLE FOR RETURN, REFUND, OR EXCHANGE. SALE IS FINAL.HKP-99173Now: $297.95Was: $549.95