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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H&K UMP (.40 S&W/.45 ACP/9mm) Paddle Mag Release
H&K Heckler & Koch
$16.95UMP Paddle Magazine Release This is a common repair and replacement part as they are easy to break on the UMP lower. Simple and easy to install with no gunsmith needed or required. Compatible With: UMP .45 UMP .40 UMP 9mm Please Note: This...$16.95 -
HK USP Detent Plate Variant 5, 6, 9 & 10
H&K Heckler & Koch
$19.95HK Detent Plate For USP Variant 5, 6, 9, & 10 Conversions This plate, when installed, will allow you to have the "safety" only and NO decock function on your pistol. This plate will fit and work for both left-hand and right-hand setups. Compatible...$19.95 -
HK416, MR556 Takedown Pin - Front - A1 Style
H&K Heckler & Koch
$64.95H&K HK MR556 Front Lower Receiver Locking Pin With Spring Loaded Detent This part is the front (large) 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...$64.95 -
HK Pistol O-Ring - Barrel - .40 S&W
H&K Heckler & Koch
$4.95New HK German Black .40 Cal Barrel O-ring For All .40 Caliber Threaded Barrels This factory part is a high wear and replacement item as the O-ring provides the seal between the slide and the barrel, which provides a secure lockup and increased accuracy...$4.95 -
HK P7M8, P7M13 Retaining Roll Pin - Gas Piston
H&K Heckler & Koch
$4.95HK P7 M8, M13 Piston Retaining Roll Pin$4.95 -
HK VP9SK, P30SK, P2000SK Magazine Locking Plate - 9mm
H&K Heckler & Koch
$8.95HK P2000SK, VP9SK & P30SK 9mm 10 Round Magazine Locking Plate For Magazine Works with the P2000SK, VP9SK and P30SK sub compact (SK) magazine models only. Compatible With: HK P30 SK HK P2000 SK HK VP9SK$8.95 -
HKP +7 HK 45C, USPC .45 ACP Magazine Extension
HKP HK Parts
$59.95HKP +7 HK 45C, USPC .45 ACP Magazine Extension HK Parts magazine extension +7 adds 7 additional rounds to the HK45C, 8 round magazine. Each unit can then be fully assembled into a 15 round HK45C magazine. Ideal for competitive shooters, concealed carry,...$59.95 -
HK USP Series Firing Pin Block Spring - Old Style
H&K Heckler & Koch
$9.95HK USP Series Old Style Firing Pin Block Spring In order to use the new firing pin block spring, you also have to upgrade the firing pin, firing pin block, as well as the firing pin block spring. HK part #214192 has been replaced with...$9.95 -
HKP HK G3,91,PTR, 93,33 & MP5, 94 Pinned Hammer Strut
HKP HK Parts
$13.95HKP HK G3,91,PTR, 93,33 & MP5, 94 Pinned Hammer Strut New USA hammer strut for 90 series rifles and pistols. A perfect spare to have on hand. This is a pinned hammer spring shank. Perfect for your HK project or rebuild. Compatible With: HK trigger...$13.95 -
HK416, MR556 Firing Pin
H&K Heckler & Koch
$54.95H&K HK MR556/416 Firing Pin New HK German manufactured. This is a great item to have on hand as the firing pin is one of the most abused components in the HK MR556 and HK 416 weapon systems. Compatible With: HK MR556 HK 416 HK CR556 HK...$54.95 -
HK G36, SL8, MP7 Gas Block Pin
H&K Heckler & Koch
$8.95H&K HK G36/SL8/MP7 Gas Block Pin The G36/SL8/MP7 gas block pin is the largest out of HK's line up (UMP/USC, 415/MR556, 417/MR762).$8.95 -
HK MP5, HK94 Grip Adapter - K Style
HKP HK Parts
$49.95HK Vertical K Grip Adapter For HK MP5 & HK94 (Adapter Only) This is the adapter needed to add an MP5K K grip to your HK94, MP5, or clone.$49.95