HK Rifle / SMG Parts
Elevate Your HK Rifle with Premium Parts – MP5, HK416, SP5, and More!
Enhance your HK rifle with top-notch parts and accessories. From HK MP5 and HK MP5K to HK SP5 and HK UMP or HK USC, we offer a vast selection. Discover high-quality magazines, binary triggers, stocks, grips, barrels, handguards, sights, and more for your firearm. Whether you own an HK416, HK SP5K, HK G36, or HK MP5 22, we have the Heckler and Koch rifle parts you've been looking for. Shop now to upgrade your rifle to perfection.
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HK UMP, USC, SL8, G36 Fixed Rear Sight Flat Spring
H&K Heckler & Koch
$8.95HK G36, SL8 & USC, UMP Fixed Rear Sight Flat Spring Compatible With: G36 SL8 USC. 45 UMP 9mm UMP .40 UMP .45HKP-16635$8.95 -
HK UMP, USC Hammer Spring - Right
H&K Heckler & Koch
$14.95HK UMP & USC Right Side Hammer Spring For LowersHKP-01892$14.95 -
On Sale
HK UMP Caliber Conversion to .40 S&W Kit - 7.87" Barrel - 30 Round Magazine
Michaels Machines
Now: $849.95Was: $999.95HK UMP 40 Caliber Conversion Kit With this UMP Conversion kit, UMP .45 sub guns can be converted to .40 caliber. Machined bolt carriers are available for USC/UMP conversion sub guns. This is a simple drop-in conversion. The time required to change...HKP-18754Now: $849.95Was: $999.95 -
Out Of Stock
HK21E, HK23E 4 Position Trigger Housing
H&K Heckler & Koch
$0.00H&K 21E/23E (7.62x51/.308 & 5.56/.223) 4 Position Trigger Housing This 4 position trigger housing is designed for factory HK21E and HK23E firearms. It is an excellent spare to have on hand for your HK belt-fed firearm, providing reliable...HKP-00248$0.00 -
HK21, HK23, HK11 Tripod Adapter Weldment
HKP HK Parts
$25.95HK21, HK23, HK11 Tripod Adapter Weldment Raw steel tripod adapter, ready to weld to the bottom of an HK21 shroud. This factory spec adapter is compatible with factory HK tripods. Compatible With: HK21 (German and FMP...HKP-00232$25.95 -
Out Of Stock
HK21E, HK23E (7.62x51/.308) & (5.56/.223) Complete Stock
H&K Heckler & Koch
$0.00HK German HK21E, 23E Stock Complete The latest manufacture and no longer in production or offered by HK Germany.HKP-00575$0.00 -
HK11, HK21, HK23 Bipod - Surplus
H&K Heckler & Koch
$447.95Heckler and Koch Bipod for HK11, HK21, HK23 German HK bipod for the HK21 series light machine gun system. This is the original, older-style HK21 bipod sourced from military surplus. These units are no longer in production and available only in limited...HKP-00565$447.95 -
HK21E, HK23E Backplate
H&K Heckler & Koch
$289.95H&K 21E/23E(7.62x51/.308) & (5.56/.223) Backplate These factory German HK21E/23E back plates are no longer in production. Grab yours before they are gone for good!HKP-00241$289.95 -
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 -
Out Of Stock
HK91, G3, PSG1, MSG90 T-Rail Reinforcement Set for Receiver
Michaels Machines
$299.95HK Receiver Reinforcement T-Rail Set For Left and Right Sides T-rails are used to strengthen HK receivers or for custom builds. These are the finest T-rails available on the market. Made from enhanced steel and perfect for that custom HK project...HKP-00236$299.95 -
Out Of Stock
HK91, G3 Magazine Loader
H&K Heckler & Koch
$0.00HK Factory Loader for HK 91/G3 Magazines Compatible With: HK 91 magazines HK G3 magazines PTR-91 Magazines HK PSG1 magazines HK MSG-90 magazines HK 90 series 308 magazinesHKP-00221$0.00 -
HK91, G3, PTR Folding Stock
Choate
$144.95HK 91, G3, PTR Side Folding Stock No gunsmith is needed as this is an easy install using your hardware from your existing fixed A2 stock. This counts as one US-made compliant part. Compatible With: HK91 G3 PTR91 Also fits HK93 and 33-style rifles...HKP-00516$144.95