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, USP Compact Complete Mag Lockout Device
H&K Heckler & Koch
$19.95H&K HK USP/USPC Complete Mag Lockout Device Easily installs and replaces the existing lanyard to the newer style lock out upgrade for the magazine lockout. Used to comply with certain state's laws and for added safety in some conditions and...HKP-16397$19.95 -
Out Of Stock
HK USP, USP Compact Old Style Hammer
H&K Heckler & Koch
$0.00HK USP & USPC Variants 1-4, 9, & 10 Old Style Hammer Compatible With: HK USP 9mm HK USP .40 S&W HK USP .45 ACP HK USP Compact 9mm HK USP Compact .40 S&W & .357 HK USP Compact .45 ACP Any USP pre-1995 with the old-style sear...HKP-02766$0.00 -
HK USP Series Front Sight 6.0mm
H&K Heckler & Koch
$54.95HK USP Series Front Sight 6.0mm Compatible With: HK USP Compact 9mm HK USP Compact 40 S&W HK USP Compact 357 SIG HK USP Compact 45 ACPHKP-02254$54.95 -
HK45, HK45 Compact, USP Old Style Bobbed Hammer
H&K Heckler & Koch
$64.95HK USP & USPC Bobbed Hammer - Older Style (without the cutout) This part is compatible with older USP full-size & USPC firearms that have the old-style hammer already. Perfect for those who prefer the shorter, lower profile "bobbed" hammer. This...HKP-14552$64.95 -
Out Of Stock
HK416, MR556 Handguard - Standard Length - Quad Rail
H&K Heckler & Koch
$0.00H&K HK MR556/416 Standard Length Quad Rail HK German HK416 & MR556 quad rail complete that includes HK 416/MR556 Handguard Screw. This handguard can also be installed on the CR556 models as well. Compatible With: HK MR556 HK 416 HK CR556HKP-02546$0.00 -
On Sale
HK416, MR556 Handguard - KeyMod 9"
HKP HK Parts
Now: $99.95Was: $269.95HK MR556 & HK416 Standard Length 9" - KeyMod HandguardHKP-17982Now: $99.95Was: $269.95 -
HK G36 Left Side Safety Lever
H&K Heckler & Koch
$24.95HK G36 Left Side Safety Selector LeverHKP-01875$24.95 -
HK G36 Magazine Floorplate - 10 and 30 Round
H&K Heckler & Koch
$11.95H&K 10/30 Round HK G36 Magazine Floor Plate New factory German G36 30 round and 10 round magazine floor plate.HKP-16381$11.95 -
HK G36 Disconnector Axle - 2 Round Burst
H&K Heckler & Koch
$10.95H&K G36 (5.56/.223) 2 Round Burst Disconnector AxleHKP-16350$10.95 -
HK UMP, USC, G36, SL8 Rear Sight Support
H&K Heckler & Koch
$19.95H&K UMP/USC/G36/SL8 (.40 S&W/.45 ACP/9mm/5.56/.223) Rear Sight SupportHKP-16362$19.95 -
HK UMP, USC, SL8, G36 Fixed Rear Sight Flat Spring
H&K Heckler & Koch
$8.95HK Heckler and Koch Fixed Rear Sight Flat Spring or Leaf Spring for HK G36, HK SL8 and HK USC, HK UMP Compatible With: G36 SL8 USC UMPHKP-16635$8.95 -
Out Of Stock
HK UMP Caliber Conversion to 9mm Kit - 16.5" Barrel - 30 Round Magazine
Michaels Machines
$889.95HK UMP 9mm Conversion Kit - US-Made UMP/USC conversion kit will convert existing USC-UMP conversions to 9mm. This is a simple drop-in conversion for those who have already done the USC-UMP conversion. The conversion parts are drop-in, with the total swap...HKP-02284$889.95