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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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 -
HK21 Feed Mechanism Latch Lever
Michaels Machines
$69.95HKP HK21 Feed Mechanism Latch Lever - 7.62x51 / .308 Replacement feed mechanism latch lever for HK21 belt-fed platforms chambered in 7.62x51 and .308. Designed to interface with the feed assembly and support proper operation of the HK21 system...HKP-00235$69.95 -
Out Of Stock
HK21E, HK23E Barrel Handle - 7.62x51 / .308, 5.56 / .223
H&K Heckler & Koch
$79.95HK German Factory HK21E/23E & HK11E/13E Barrel Handle - New Factory German fiberglass/polymer extended E barrel handle. This is also considered an upgrade for older style HK21 barrel handles Compatible With: HK23E HK21E HK11E HK13E MM23E, 21E,...HKP-00243$79.95 -
Out Of Stock
HK23E, HK13 Barrel - 5.56 / .223 - 17.75" - Heavy
Michaels Machines
$1,437.95Michael's Machines 5.56 NATO / .223 Remington Barrel for HK 23E Heavy Rifle Brand new US-made custom rifle barrel. A must-have spare for your HK rifle or MG. Factory Barrels are hard to find and expensive, but these barrels are of great value and price...HKP-02513$1,437.95 -
HK21E, HK11E, PSG1, MSG90 Firing Pin
H&K Heckler & Koch
$119.95HK German 21E, 11E, PSG1, & MSG90 Firing Pin New HK genuine German firing pin. These firing pins are no longer in production from HK. We have a limited number available and once they are gone, they are gone for good. Compatible With: HK...HKP-01758$119.95