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 Upper Conversion Kit - 9" - HK416C Style
HKP HK Parts
$899.95MR556 and HK416 Upper Conversion Kit - 9" - 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 9" barrel conversion kit...HKP-18674$899.95 -
HK MR556, MR762 Buttstock Release Lever
H&K Heckler & Koch
$9.95H&K HK MR556/MR762 Buttstock Release Lever Compatible With: HK MR556 HK MR762HKP-16621$9.95 -
Out Of Stock
HK416, MR556 Barrel Conversion Kit - 9" - HK416C Style
HKP HK Parts
$0.00MR556 & HK416 Barrel Conversion Kit - 9" - 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 9" barrel conversion kit...HKP-18401$0.00 -
Out Of Stock
HK416, MR556, MR762 Buffer Staking Tool
H&K Heckler & Koch
$0.00HK 416, MR556 & MR762, HK 417 - Buffer Staking Tool - German HK Rare HK factory HK staking tool for the castle nut to be staked. These took over 3 years to get and offered for cost while supplies...HKP-16945$0.00 -
Out Of Stock
HK416 Bolt Head, Incomplete
H&K Heckler & Koch
$0.00Heckler and Koch Incomplete Bolt Head for HK416 New HK German HK416 Bolt Head Complete- IncompleteHKP-00046$0.00 -
Out Of Stock
HK416 Bolt Group, Complete
H&K Heckler & Koch
$0.00Heckler and Koch's Bolt Group Complete - German for HK416 New HK German HK416 Bolt group. Rare component as the HK bolt groups are now considered EUC items and are not for sale from HK Germany. ...HKP-00043$0.00 -
Out Of Stock
HK416, MR556 Magazine - 30 Round
H&K Heckler & Koch
$0.00Heckler and Koch 30 round 5.56 mm Polymer Magazine for HK416, HK MR556A1, and AR15 Fits HK MR556A1, HK416, AR15 and all high quality AR/M4/M16 type firearms. Heckler & Koch reliability and...HKP-15805$0.00 -
Out Of Stock
HK G36 Carrying Handle, Incomplete - 1.5X Single Optic
H&K Heckler & Koch
$0.00H&K HK G36 Complete 1.5X Single Optic Carrying Handle The 1.5X single optics are quite rare. Mounting hardware sold separately.HKP-16742$0.00 -
Out Of Stock
HK G36C Handguard
H&K Heckler & Koch
$0.00G36C Slim line handguard with Hkey mounting slots HK German G36C forearm with HKey mounting slots. Made in Germany.HKP-18546$0.00 -
Out Of Stock
HK G36K Piston Rod Assembly, Complete
GSG9
$59.95GSG9 USA Made Complete Gas Piston Rod and Spring Assembly for HK G36K New spring assembly that is a must have for spare parts or to use on that HK SL8-G36 conversion. This is the proper length gas...HKP-18249$59.95 -
Out Of Stock
Flash Hider - Threaded 15x1 RH - 5.56 / .223
H&K Heckler & Koch
$0.00Heckler and Koch's Factory Correct Flash Hider - Threaded 15x1 RH Fits all HK barrels. 15x1 The right-hand thread is the thread pitch. Perfect for the SL8 and G36 type conversions. Specifications:HKP-00952$0.00 -
Out Of Stock
HK G36 Lower Housing - 4 Position Burst Navy
H&K Heckler & Koch
$0.00H&K G36 (5.56/.223) 4 Position Burst Navy Style Lower Housing This lower housing, featuring the Navy style housing, is offered without internals. Previously, G36 lowers were only available as...HKP-02231$0.00