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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HK45, HK45 Compact, USP Old Style Bobbed Hammer
H&K Heckler & Koch
$64.95HK USP & USPC Bobbed Hammer - Older Style (without the cutout) This part is compatible with older USP full-size & USPC firearms that have the old-style hammer already. Perfect for those who prefer the shorter, lower profile "bobbed" hammer. This...HKP-14552$64.95 -
HK416, MR556 Firing Pin Catch - Titanium
HKP HK Parts
$49.95HK MR556 & HK416 Firing Pin - Titanium Made in the US from grade 6 Titanium. Get the lightest, strongest firing pin available for your HK firearm. Compatible With: HK MR556 HK416 HK M27HKP-17767$49.95 -
HK G36 Disconnector Axle - 2 Round Burst
H&K Heckler & Koch
$10.95H&K G36 (5.56/.223) 2 Round Burst Disconnector AxleHKP-16350$10.95 -
HK MSG90 Locking Roller -4 - 7.96mm Set -Titanium
H&K Heckler & Koch
$329.95MSG90 (7.62x51/.308) -4 Rollers 7.96mm Set -Titanium Half moon rollers. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the bolt head. An easy way to remember the size you need to order - plus-size rollers...HKP-02451$329.95 -
HK CC9 Disassembly Safety Lever
H&K Heckler & Koch
$5.95H&K CC9 Disassembly Safety Lever The CC9 disassembly safety lever prevents accidental discharge during disassembly by blocking the trigger mechanism. Compatible With: HK CC9HKP-22120$5.95 -
HK MR556, MR762 Adapter - Buttstock - Ambi Slimline - Snap Hook
H&K Heckler & Koch
$177.95H&K MR556/MR762 Ambi Slimline Buttstock Snap Hook Adapter Genuine H&K snap hook adapter designed to provide ambidextrous sling attachment points for MR556 and MR762 slimline buttstocks. Compatible With: HK MR556 slimline buttstocks HK MR762...HKP-22100$177.95 -
HK MR556 A4/416 A5 Gas Block Spring
H&K Heckler & Koch
$19.95H&K MR556 A4/416 A5 Gas Block Spring German-made gas block spring for the MR556 A4 and HK416 A5. Compatible With: HK MR556 A4 HK416 A5HKP-22060$19.95 -
HK MR762 A4 Gas Vent Screw - 1.0mm
H&K Heckler & Koch
$29.95H&K MR762 A4 1.0mm Gas Vent Screw German 1.0mm gas vent screw for MR762 A4. Provides less venting than the factory-installed 1.3mm screw. Compatible With: MR762 A4HKP-21954$29.95 -
Out Of Stock
KNS Precision HK Push Button Take Down Pin - Large
KNS Precision
$24.99KNS Precision HK Push Button Take Down Pin - Large .275" This 7mm (.275") diameter take-down pin has a spring-loaded push button. When the button is depressed, the stainless steel keeper detents retract for easy pin removal. The pin is designed to...HKP-21388$24.99 -
HK VP9SK Locking Block Guide
H&K Heckler & Koch
$182.95H&K HK VP9SK Locking Block Guide Locking block guide complete, welded for frame on all HK VP9SK, VP40SK models. Compatible With: HK VP9SK HK VP40SK Does NOT fit the full size VP modelsHKP-18309$182.95 -
Out Of Stock
HK UMP, USC & G36, SL8 Sear
HKP HK Parts
$14.95HK Complete Sear G36, UMP, USC, SL8 Made in the USA Compatible With: HK UMP HK USC HK G36 HK SL8HKP-19555$14.95 -
HK MR762 Drop Safety Catch Pin
H&K Heckler & Koch
$4.95H&K HK MR762 Drop Safety Catch Pin Compatible With: HK MR762HKP-16617$4.95