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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HK416, MR556 Ejection Port Cover Door Assembly
H&K Heckler & Koch
$89.95HK German HK 416, MR556 Ejection Port Cover Door Assembly Complete This is the newer polymer style cover found on the latest HK 416 and MR556's. This is the complete ejection port door assembly needed on all AR15 or MR556/HK416 models. Can also be used...$89.95 -
HK Ambidextrous Sling Pin Locking Knob
H&K Heckler & Koch
$11.95New HK German Ambidextrous Sling Pin Locking Knob These are common replacement items, they can become loose as the O-ring wears and falls off. Be sure to order extra O-rings to avoid losing the locking nut. This is a common replacement part for those...$11.95 -
HK VP9, HK VP40 Backstrap - Small - Black
H&K Heckler & Koch
$29.95H&K VP9, HK VP40 Backstrap - Small - Black New HK German manufacture. Compatible With: HK VP9 HK VP40 HK VP9A1 F HK VP9A1 K$29.95 -
HK416 Firing Pin Retaining Pin - Enhanced
H&K Heckler & Koch
$19.95HK 416 Firing Pin Retaining Pin- New Style This part is the newer style pin that is goldish, super hardened, and much less prone to wear and tear. The enhanced version is the most robust, easiest-to-use pin available. Compatible With: HK 416 AR15, M4...$19.95 -
HK SL8, G36 Magazine Release Axle Pin
GSG9
$10.95HK G36 & SL8 Magazine Release Axle - USA Mag release axle for all G36 & SL8 models. A must-have spare part. Made in the USA. Compatible With: G36 G36K G36K SL8 Other custom G36 type builds$10.95 -
HK UMP/USC (.40 S&W/.45 ACP/9mm) Recoil Buffer
H&K Heckler & Koch
$20.95HK 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 models$20.95 -
HK P30SK Firing Pin Safety Pin
H&K Heckler & Koch
$4.95H&K HK P30SK Firing Pin Safety Pin This is a factory original HK part manufactured in Germany.$4.95 -
HK USP, USP Compact, P2000 Magazine Release Lever
H&K Heckler & Koch
$12.95HK Magazine Release Lever Compatible With: HK USP .45 HK USP .40 HK USP 9mm HK USP Compact 9mm HK USP Compact .357 SIG HK USP Compact .40 HK USP Compact .45 HK USP Tactical, Elite, Expert both full size & compact HK P2000 9mm & .40/.357 HK...$12.95 -
HK MP5, SP89, HK91, HK93, HK94 Grip Screw
H&K Heckler & Koch
$8.95H&K Grip Screw New HK grip screw that is now out of production. Great for a spare. Compatible With: HK91 HK93 HK94 SP89$8.95 -
HK VP9, VP9SK, VP40 Sear Spring
H&K Heckler & Koch
$9.95H&K VP9/VP9SK, VP40 Catch Pressure Spring Compatible With: HK VP9 HK VP9SK HK VP9A1 F, VP9A1 K HK VP40$9.95 -
HK MP5, MP5K Magazine Release Paddle - Anti-Rattle Roller-Tip - 9mm
H&K Heckler & Koch
$64.95German HK MP5, MP5K Anti-Rattle Roller Tipped "Paddle" Magazine Release Factory German Paddle mag release for all 9mm MP5, MP5K HK builds. Our parts are made by HK in Germany and are factory-fresh production. Compatible With: MP5, 94, HK SP5 MP5K, SP89,...$64.95 -
HK G36, SL8 Ambidextrous Sling Pin
H&K Heckler & Koch
$49.95HK German G36/SL8 Ambidextrous Sling Pin This part replaces all of the HK SL8 or G36 push pins with a loop for the sling. This can be moved to attach a sling on either the left or right sides with ease.$49.95