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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On Sale
HK USP45 Compact Compensator - MOD 1
HKP HK Parts
Now: $143.95Was: $179.95HK Parts MOD 1 Compensator for HK USPC .45 ACP The HK Parts MOD 1 compensator perfectly blends form and function, setting a new standard in muzzle control. Experience a significant reduction in muzzle flip and recoil, allowing you to get back on target...HKP-22072Now: $143.95Was: $179.95 -
HK VP40, USP40T Thread Protector - 14.5x1mm LH
H&K Heckler & Koch
$30.95H&K USP40T/VP40T Thread Protector The HK thread protector is a must have accessory when a sound suppressor or muzzle attachment is not mounted on your tactical pistol. The thread protector will prevent damages to the threads and crown. Compatible...HKP-21994$30.95 -
HK P30SK Firing Pin Safety Spring
H&K Heckler & Koch
$5.99H&K P30SK Firing Pin Safety Spring Replacement firing pin safety spring for the P30SK. Maintains proper tension on the firing pin safety plunger to ensure safe and reliable function. Compatible With: HK P30SKHKP-21977$5.99 -
HK MR762 A4 Handguard - Complete
H&K Heckler & Koch
$349.95Heckler and Koch HK MR762 A4 Complete Handguard Factory HK handguard with a 12 o’clock Picatinny rail and M-LOK slots at 3, 6, and 9 o’clock for mounting optics and accessories. Includes dual QD sling sockets for ambidextrous sling use...HKP-21972$349.95 -
On Sale
HK UMP Magazine - 25 Round - .45 ACP - German LEO Markings - LIKE NEW
H&K Heckler & Koch
Now: $172.34Was: $229.95HK Heckler and Koch .45 ACP 25 Round Magazine for HK UMP - German LEO Markings - LIKE NEW Like-new PD trade in HK German UMP .45 cal 25 Round Factory Magazines. These magazines will fit all UMP factory firearms as well as the USC's that have been...HKP-17917-BNow: $172.34Was: $229.95 -
On Sale
Bolt Action Drake Bolt Knob - Midnight Bronze - 5/16x24 RH
Tactical Precision MFG
Now: $20.95Was: $39.99TPM - Drake Bolt Knob - Midnight Bronze These bolt knobs are made from aluminum and are finished in midnight bronze Cerakote and will fit any 5/16-24 threaded bolt handle. Features: Material: aluminum Color: midnight bronze Threading:...HKP-20785Now: $20.95Was: $39.99 -
On Sale
HK UMP 45 Magazine Spring - .45 ACP - 15 Round - US
HKP HK Parts
Now: $7.95Was: $9.95HK UMP .45 15 Round Magazine Spring Perfect for spares and to have on hand as these are consumable item that needs to be replaced from time to time. A must have item if you own a USC/UMP conversion or UMP.HKP-20679Now: $7.95Was: $9.95 -
Out Of Stock
HK UMP .45 Semi-Auto Bolt Group - Complete
Michaels Machines
$749.95Michaels Machines HK UMP .45 Semi-Auto Bolt Group - Complete MM’s UMP Tungsten filled UMP .45 bolt carrier complete. Heat treated, parkarized and polished for the best look and function possible, as an added bonus it now includes German HK...HKP-20627$749.95 -
On Sale
HK UMP .40 Semi-Auto Bolt Group - Complete
Michaels Machines
Now: $584.95Was: $649.95Michaels Machines HK UMP .40 Semi-Auto Bolt Group - Complete MM’s UMP tungsten filled UMP .40 bolt carrier. Heat treated, parkarized and polished for the best look and function possible, as an added bonus it now includes German HK internals which...HKP-20626Now: $584.95Was: $649.95 -
On Sale
HK MP5 Binary Trigger Group - Ambi 3 Position Universal Housing - .40 S&W, 10mm
H&K Hechler & Koch / FA Franklin Armory
Now: $1,049.95Was: $1,399.95Franklin Armory BFSIII HK-C1 - Trigger Group for MP5 .40, 10mm- Universal Housing Our universal binary trigger group will come set up as a MP5 40/10, but with our Navy 3 position universal housing you will be able to install in a MP5/SP5, HK 93,...HKP-20085Now: $1,049.95Was: $1,399.95 -
On Sale
HK MR556 Rail System - 10" - M-LOK
KDG Kinetic Development Group
Now: $279.95Was: $374.95KDG HK MR556 10" M-LOK Rail System Direct-mount rail system designed to replace the factory HK MR556 handguard. Features a continuous monolithic Picatinny rail at the 12 o’clock position and M-LOK mounting slots at the 3, 6, and 9 o’clock...HKP-19246Now: $279.95Was: $374.95 -
HK G36, SL8 Handguard - Side, Bottom Mounting
H&K Heckler & Koch
$279.95HK German G36 & HK SL8 Forearm With Rail Mounting Points Newer style that has the hard mounting points for the side and bottom rails. HK Black In Color. Compatible with all HK SL8's & G36E's models.HKP-01420$279.95