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.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
Out Of Stock
$0.00 -
On Sale
HK USP Compact Lockout Device
H&K Heckler & Koch
Now: $9.95Was: $18.95HK USPC Lockout Device Easily installs to lock out the magazine. Used to comply with certain state laws and as an added safety feature. This lockout device can be retrofitted to older-style USPC's that do not have the lockout device installed. Compatible...HKP-01500Now: $9.95Was: $18.95 -
HK45, USP V5, V6, V7 Tube
H&K Heckler & Koch
$5.95HK USP/45 Variants 5, 6, & 7 Tube Compatible With: HK USP 9mm HK USP 40 S&W HK USP 45 ACP HK USP Compact 9mm HK USP Compact 357 HK USP Compact 40 HK USP Compact 45HKP-02163$5.95 -
Out Of Stock
HK45, HK45 Compact , USP, USPC LEM Sear
H&K Heckler & Koch
$0.00HK USP, USPC, 45, & 45C LEM Sear LEM Hammer Fit Replaces The LEM Hammer In The Following Pistols: USP USPC HK45 HK45CHKP-02704$0.00 -
HK45, HK45 Compact, HK USP Series V7 LEM Hammer Axle
H&K Heckler & Koch
$49.95HK USP Series/45/45C V7 LEM Hammer Axle Compatible With: HK USP 45 HK USP 40 HK USP 9mm HK USP Compact 45 HK USP Compact 40 HK USP Compact 9mm HK USP Compact 357 HK45 HK45 CompactHKP-01929$49.95 -
HK45, HK45 Compact, USP V5 Complete Bobbed Hammer DAO
H&K Heckler & Koch
$68.95Complete Bobbed Hammer DAO Compatible With These Variants 5, 6, 7: USP 45 ACP USP Compact 9mm USP Compact 40 S&W USP Compact 357 SIG USP Compact 45 ACP HK45 HK45 CompactHKP-01592$68.95 -
Out Of Stock
HK416, MR556 Upper 8" 416C Style Conversion Kit
HKP HK Parts
$1,285.95Upper Conversion Kit for HK416 and MR556 8 inch barrel - HK 416C Style Finally an answer for all of those that have been wanting as close to the original, rare unicorn of a find HK 416C 8" barrel conversion kit for 416 or MR556. Each conversion kit...HKP-18629$1,285.95 -
On Sale
HK416, MR556 Handguard - 9" - HKey
H&K Heckler & Koch
Now: $289.95Was: $399.95H&K HK MR556/416 9" Modular Rail System - Black HK German MR556 & CR556 handguard that accepts the HKey style modular rail sections. This handguard is compatible with the OSS suppressor system. HK has discontinued this handguard. Only have a few...HKP-17341Now: $289.95Was: $399.95 -
HK G36 Optic Mount - 18" - Mechanical Sights
H&K Heckler & Koch
$699.95Sight Rail with Mechanical Sights - G36 Low profile rail with built-in mechanical sights. Made from aluminum. Overall length 18". Compatible With: G36 G36K G36CHKP-18729$699.95 -
HK G36 Handguard, Incomplete - Original Style
H&K Heckler & Koch
$69.95H&K G36 (5.56/.223) Handguard - Original Style- IncompleteHKP-16356$69.95 -
HK G36, UMP, USC Handstop Filler Piece
H&K Heckler & Koch
$59.95H&K UMP/USC/G36 (.40 S&W/.45 ACP/9mm/5.56/.223) Hand Stop Filler Piece HK German Hand Stop filler piece for UMP and G36.HKP-17779$59.95 -
Out Of Stock
HK21E, HK23E Backplate Assembly With Buffer
H&K Heckler & Koch
$449.95HK 21E Backplate Assembly With Heavy Buffer Genuine Heckler and Koch. Unique back plate assembly for a pistol type build or a low profile addition to the HK21E/HK23E. Compatible With: HK 21E HK 11HKP-01407$449.95