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 Mark 23 Firing Pin Spring
H&K Heckler & Koch
$8.95HK Mark 23 Firing Pin Spring Compatible With: HK Mark 23 SOCOMHKP-01627$8.95 -
Out Of Stock
HK USPC, USPC Tactical Conversion Barrel - .40 S&W to .357 SIG - Non-Threaded
RCM
$237.50RCM HK USPC .40 S&W to .357 SIG Caliber Conversion Barrel - Non-Threaded Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest replacement barrel for the HK USPC ...HKP-17747$237.50 -
HK USC Magazine Release
H&K Heckler & Koch
$19.95Heckler and Koch .45 ACP Carbine Magazine Release for HK USC This is a great replacement as they are prone to breakage and wear. Please Note: For those that have a HK USC with a bullet button and are moving to a free state and want to revert back to the...HKP-02196$19.95 -
HK UMP, USC, G36, SL8 Sear
H&K Heckler & Koch
$29.95HK Complete Sear G36, UMP, USC & SL8 Genuine German Heckler & Koch part. Compatible With: HK UMP HK USC HK G36 HK SL8HKP-01850$29.95 -
On Sale
Micro Flash Hider - 4 Prong - Threaded 15x1 RH - 5.56 / .223 - 7.62x51 / .308
USA
Now: $54.95Was: $64.95HKP (5.56/.223) & (7.62x51/.308) 4 Prong Micro Flash Hider - Threaded 15x1 RH New shorter "micro" version US-made 4-prong flash hider threaded 15x1 RH. Micro FH will fit all HK .223 & .308 threaded barrel applications and barrels. Made from...HKP-02189Now: $54.95Was: $64.95 -
HK Selector Catch Lever - Ambi Trigger Packs
H&K Heckler & Koch
$26.95HK German Ambidextrous Trigger Pack Axle Catch Lever This is the lever that allows you to take apart any of the ambidextrous trigger packs. This lever takes the spring tension off the left and right side selector levers, allowing you to remove and...HKP-01636$26.95 -
HK MP5, MP5K Selector Lever, Left Side - Navy Trigger Groups
H&K Heckler & Koch
$399.95H&K Standard 4 Position Burst Left Side Selector Lever Compatible with any of the 0, 1, 3, F or 0, 1, 2, F trigger packs. Brand new HK German part. No longer available so get them while you can.HKP-00123$399.95 -
Out Of Stock
HK416, MR556 Back Plate - QD Attachment
H&K Heckler & Koch
$68.95H&K HK MR556/416 Back Plate w/QD Attachment Factory HK back plate with QD socket for the HK MR556 and 416 A1/A4 models. Compatible With: HK MR556/HK 416 (A1 and A4)HKP-22205$68.95 -
On Sale
Arm Bar and Stock or Brace Adapter - Picatinny 9"
JMAC Customs
Now: $230.95Was: $272.85JMAC Universal Picatinny 9" Arm Bar with Brace/Stock Adapter (A)rm(B)ar(9)inch(R)ise + AB-BA Brace Adapter + our 1913 Folding Mech (not assembled) Features: Modular Design - Brace/Stock with many mounting options Integrated QD Sling Socket 9"...HKP-21248Now: $230.95Was: $272.85 -
On Sale
Micro Comp - Threaded 14.5x1 LH - .40 S&W
HKP HK Parts
Now: $15.95Was: $29.95HKP .40 S&W Micro Comp - Threaded 14.5x1 LH The HK Parts Micro Comp & Thread Protector is a lightweight, dual-function device serving as both a compensator and thread protector. It attaches easily to any factory-spec 14.5x1 LH .40 S&W barrel,...HKP-19954Now: $15.95Was: $29.95 -
HK P30SK 9mm Complete Recoil Spring Assembly
H&K Heckler & Koch
$64.95HK P30SK 9mm Complete Recoil Spring Guide Rod Assembly Brand new HK German manufacture. Compatible With: P30SK 9mmHKP-17938$64.95 -
HK USP Slide Release Lever
H&K Heckler & Koch
$59.95HK USP Slide Release Lever Compatible With All USP Full Size Pistols & All USP Full Size Variants Below: USP 45 USP 40 USP 9mm USP Tactical (all calibers) USP Expert (all calibers) USP Elite (all calibers)HKP-01674$59.95