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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HK A3 Buttstock Clamping Lever Spring - Retractable
H&K Heckler & Koch
$19.95HK German Retractable Stock Clamping Lever Spring For A3 Retractable Stocks This spring is the most common breakage/wear item in the internal workings of the A3 retractable stock.HKP-01089$19.95 -
On Sale
HK MP5 SP5K, SP89, G3, HK91, HK33, HK53, HK93 Rail Riser - Picatinny
MFI
Now: $29.95Was: $44.95MFI Picatinny Rail Riser For Scope MFI Picatinny rail riser to elevate your optic by 18.8mm (.740"). This see-through riser allows a full view through the factory iron sights. This unit is similar to the A.R.M.S. #5 base scope mount and STANAG to...HKP-00899Now: $29.95Was: $44.95 -
HK MP5 Cocking Tube - 9mm
H&K Heckler & Koch
$109.95H&K MP5 9mm Cocking Tube New factory German HK uninstalled part directly from HK Germany. Rare and hard to find. Compatible With: MP5, 94, SP5 MP5 clones or other custom buildsHKP-00093$109.95 -
Out Of Stock
HK MP5, MP5K Case Deflector
H&K Heckler & Koch
$0.00HK German case deflector for receiver flat or receiver for all MP5, HK94, MP5K & SP89 builds. The case deflector is riveted or welded in place on the ejection port of the 9mm receiver/flat to aid in the extraction of the 9mm round. HK MP5, 94 HK...HKP-00871$0.00 -
AR-15 ARC Fire - Forced Reset Trigger - Ambidextrous Levers
AS Designs
$249.95ASD 3-Position ARC-Fire AR-15 Trigger with Ambidextrous Controls AS Designs' ARC-Fire (Active Reset Clutch) trigger is an innovative take on forced reset triggers. The trigger is reset immediately after each shot, resulting in rapid follow-up shots...HKP-22501$249.95 -
Out Of Stock
HK USP Conversion Barrel - .40 S&W to 9mm - Threaded - 1/2x28
RCM
$214.95RCM HK USP .40 to 9mm Conversion Barrel - Threaded - 1/2x28 This 9mm conversion barrel is a drop-in replacement that allows your USP to shoot the popular 9mm cartridge. It has the standard 1/2x28 thread and comes with a thread protector. Each...HKP-21787$214.95 -
On Sale
HK MP5 Pistol Stabilizing Brace - SBA5
SB Tactical
Now: $214.95Was: $264.95SB Tactical HK MP5 SBA5 Pistol Stabilizing Brace SB Tactical brace married with our MP5 end cap creates a true drop-in brace. With a 5-position adjustable length, this brace can be tailored to fit any body frame. Available exclusively here at HK...HKP-21672-MNow: $214.95Was: $264.95 -
MP9, TP9, APC9, GHM9, SPC9 Magazine Spring - 9mm - 30 Round
B&T Brugger & Thomet
$6.95B&T 30 Round 9mm Magazine Spring Factory B&T replacement magazine spring for 30 round 9mm magazines. Compatible With: MP9/TP9 APC9 GHM9 SPC9HKP-21758$6.95 -
Out Of Stock
PTR Spike Front Sight Gen 2 - Orange
Blitzkrieg Components
$84.95Blitzkrieg PTR Spike Front Sight Gen 2 - Orange The Blitzkrieg Gen 2 HK-style front sight introduces a modernized sighting system with enhanced precision and ease of use. Featuring a distinctive spike-tipped post and a bright Tritium dot with an orange...HKP-21105$84.95 -
HK UMP Magazine - .40 S&W - 30 Round - LEO Marked
H&K Heckler & Koch
$99.9530 Round Magazine - LEO Marked - New - UMP .40 S/W This magazine will fit all HK UMP .40 Caliber UMP's as well as the USC-UMP .40 caliber conversions. New factory fresh production HK magazine. The perfect option for those that like to collect LEO marked...HKP-20664$99.95 -
HKP 2 Point Leather Sling - Brown
HKP HK Parts
$49.952 Point Leather Sling - Brown These new HK Parts 2-point slings are based off of the original German HK design that are no longer offered. This is a 1st time offering, handcrafted by a German artisan. Made in the USA from quality leather and hardware for...HKP-20162$49.95 -
HK Single Point Leather Sling - Black
HKP HK Parts
$49.95Single Point Leather Sling - Black Our leather sling utilizes two HK style sling hooks to attach to a single mounting point. Designed to replicate the original, out of production, German HK offering. Each sling is handcrafted in the US by a German...HKP-20151$49.95