Small Parts
Explore our extensive selection of HK small parts at HKParts, perfect for repairs, upgrades, and custom builds. Our inventory includes high-quality, precision-machined replacement parts and maintenance kits designed for a wide range of HK models. Whether you need push pins, springs, or custom components, our HK-specific small parts ensure optimal performance and durability for your firearm.
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HK Mark 23 Firing Pin Retaining Pin
H&K Heckler & Koch
$8.95HK Mark 23 Firing Pin Retaining Pin Replacement pin for the Mark 23 firing pin block. A must have part to have on hand.HKP-01601$8.95 -
HK416, MR556, MR762 Bolt Catch Pin
H&K Heckler & Koch
$4.95Heckler and Koch HK MR556, HK MR762, and HK416 Bolt Catch Pin The factory roll pin is used to hold the bolt catch in place. Great to have on hand in the event this item becomes lost or damaged when doing maintenance Compatible With: HK416,...HKP-02677$4.95 -
HK45, HK45 Compact, USP, USP Compact LEM Cocking Piece Elbow Hammer Rebound Spring
H&K Heckler & Koch
$9.95HK LEM Cocking Piece Elbow Hammer Rebound Spring This item is a common wear and replacement item for those who have LEM triggers installed. Compatible With: USP USPC HK45 HK45CHKP-02479$9.95 -
HK416, MR556, HK417, MR762 Takedown Pin - Rear - A1 Style
H&K Heckler & Koch
$79.95H&K HK MR556/MR762/416/417 Rear Lower Receiver Locking Pin This is the rear takedown pin with ball detent and locking mechanism installed. The idea behind this type of system is to decrease the movement of the upper and lower receivers and improve...HKP-02672$79.95 -
HK45, HK45 Compact USP Detent Compression Spring
H&K Heckler & Koch
$5.95HK Slide Detent Compression Spring For All HK USP & HK45, HK45C Models The detent spring is needed for positive de-cocking and safety functions of the detent plate. A spare and replacement part as it is prone to breakage and wear. This is also one of...HKP-01257$5.95 -
HK45, HK45 Compact, USP, USPC Sear Roll Pin
H&K Heckler & Koch
$5.95Sear Roll Pin HK USP 9mm .40 S&W .45 ACP HK USP Compact 9mm .40 S&W .357 SIG .45 ACP HK45 HK45 CompactHKP-01815$5.95 -
HK416 A1, MR556 Barrel Nut
H&K Heckler & Koch
$53.95Heckler and Koch Barrel nut for MR556A1 rifle All steel barrel nut. This item is a must-have repair and replacement part for removal or when you have any work done to your barrel, as the barrel nut may become damaged in the removal and...HKP-02535$53.95 -
Out Of Stock
HK UMP, USC Recoil Buffer - Heckler and Koch
H&K Heckler & Koch
$9.95HK German USC & UMP Recoil Buffer Replaceable spare lower housing or buffer for buffer housings. This is a high wear and replacement item and a must-have for spare parts. Compatible With: HK USC .45 HK UMP modelsHKP-00594$9.95 -
Out Of Stock
HK VP9, VP9SK, VP40 Safety Clamp
H&K Heckler & Koch
$5.95H&K HK VP9/VP9SK, VP40 Safety Clamp - Black Genuine H&K safety clamp. Compatible With: HK VP9 HK VP9SK HK VP40 HK VP9A1 F HK VP9A1 KHKP-16795$5.95 -
HK45, HK45 Compact, USP Trigger Bar Detent Spring
H&K Heckler & Koch
$5.95H&K HK USP/45/45C Trigger Bar Detent Spring This is a common replacement part as it can become worn or lost. Compatible With The Newer Style HK45 & HK45C Models: HK45, HK45 Tactical HK45C, HK45C Tactical Compatible With The HK USP...HKP-01254$5.95 -
HK90 Series Compression Spring for Shifter Rod on Burst Trigger Packs
H&K Heckler & Koch
$10.95H&K Burst Trigger Pack Compression Rod Spring Burst pack compression spring for compression rod found in all HK Burst Trigger Packs. This part, along with the compression rod, is the number one most common wear or breakage parts in HK Burst Packs...HKP-16199$10.95 -
HK MR556, MR762 A4 Safety Lever - Left
H&K Heckler & Koch
$12.95H&K MR556/MR762 A4 Safety Lever - Left Left-side selector lever for MR-series ambidextrous safety systems. Compatible With: HK MR762 A1/A4 HK MR556 A1/A4HKP-21965$12.95