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 MP5K to G3 Stock or Brace Adapter
HKP HK Parts
Now: $72.64Was: $113.95HKP HK MP5K to G3 Brace/Stock Adapter The MP5K/G3 adapter enables seamless compatibility between MP5K firearms and G3-style stocks. Designed for a secure and sturdy connection, it's an excellent...HKP-21853Now: $72.64Was: $113.95 -
On Sale
HK UMP, USC Top Rail for Optics with Screws - Extended - USED - BLEMISHED
H&K Heckler & Koch
Now: $37.46Was: $99.95H&K HK UMP & HK USC Extended Top Rail For Optics with Screws - USED - BLEMISHED MINOR SCRATCHES.HKP-20502-BNow: $37.46Was: $99.95 -
HK45 +5 E2 Magazine Extension Kit
HKP HK Parts
$64.95HKP HK45 +5 E2 Magazine Extension Kit Our HK45 E2 design boldly transforms our magazine extension, giving it an aggressive look along with superior functionality. The enhanced features throughout the...HKP-21627-M$64.95 -
HK VP9 R3D 2.0 Night Sights - Orange
XS Sights
$127.95XS Sight Systems VP9OR R3D 2.0 Night Sights - Orange Their second-generation R3D night sights are engineered to give you a brighter stronger set of sights. Easily install their sights with a set...HKP-21465$127.95 -
On Sale
HK MG5 Unigrip QD with Bipod
B&T Brugger & Thomet
Now: $152.97Was: $239.95B&T HK MG5 Unigrip QD with Bipod This grip is made for the HK MG5 but is very versatile and can attacht to any firearm that has a forearm with a picatinny rail. It is primarily a foregrip, but due to...HKP-21051Now: $152.97Was: $239.95 -
HK UMP, USC Top Rail - Extended - Optics
HKP HK Parts
$59.95HKP HK UMP & HK USC Extended Top Rail For Optics Nearly an 1" longer than the standard length top rail for mounting any Picatinny mount optic. Made in the USA from 6061 aluminum and hard coat...HKP-21048$59.95 -
On Sale
HK VP9 Rail Mount Compensator - OD Green
HKP HK Parts
Now: $101.21Was: $169.95HKP HK VP9 Rail Mount Compensator - OD Green *DO NOT USE COMPENSATOR WITH A THREAD PROTECTOR INSTALLED ON THE BARREL. Doing so will result in damage to your firearm and compensator.*HKP-20987Now: $101.21Was: $169.95 -
B&T TP9 ,MP9 Barrel Guide - Suppressor Adapter
B&T Brugger & Thomet
$419.95Brugger and Thomet's Barrel Guide and Suppressor Adapter for your B&T TP9 and B&T MP9 Swiss B&T manufactured barrel adapter assembly for the TP9, HK MP9 and SSP models. Allows the user to install...HKP-17299$419.95 -
HK MP5 LS5 Trigger Group, Complete - Flat Trigger - Semi shelf
Lee Sporting / Magpul
$549.95Lee Sporting Complete Trigger Group - MP5 - Flat Trigger Semi-shelf The LS5 trigger group from Lee Sporting is a definitive ergonomic upgrade over the OEM grip, boasting a weight reduction of 4.3oz...HKP-20483$549.95 -
HK416, MR223 Handguard - 11" - M-LOK - Coyote Tan
B&T Brugger & Thomet
$279.95B&T Brugger and Thomet 11" M-LOK Handguard for HK416 and HK MR223 - Coyote Tan B&T's one-piece 10-inch MLOK handguard for the Heckler and Koch HK416 and civilian equivalent MR223 is anHKP-20400$279.95 -
On Sale
HK MP5 Pistol Stabilizing Brace - SBA4 - Adapter Included - OD Green
SB Tactical
Now: $229.95Was: $294.95SB Tactical HK MP5 SBA4 Pistol Stabilizing Brace & Adapter - OD Green MP5, SBA4 5-position adjustable brace features an integral ambidextrous QD sling socket for a quick install and removal sling...HKP-20351Now: $229.95Was: $294.95 -
Out Of Stock
AB-8 and Stock or Brace Adapter - 1913 Folding Mech
JMAC Customs
$269.95JMAC Customs AB-8 w/ Brace/Stock Adapter and 1913 Folding Mech If your firearm doesn't already have a 1913 attachment rail on the rear, choose the appropriate adapter above! (A)rm(B)ar(8)inch +...HKP-20148$269.95