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 UMP Hammer Spring - Left
USA
$9.95USA HK UMP Left Hammer Spring New U.S hammer spring- left side A high wear item that needs to be changed when light firing pin strikes develop on your USC or UMP firearm. Compatible With: HK UMP models 45, .40 & 9mm USC .45 and other...HKP-20840$9.95 -
HK45, P30 Lockout Key
H&K Heckler & Koch
$12.95Safety Lockout Key HK45, HK45C, P30, & P30L New HK German lockout key for the factory HK mag release lockout. Compatible With: HK 45, HK45 Tactical HK 45C, HK45C Tactical All HK P30 All HK P30L All HK P30HKP-02504$12.95 -
HK45 Series, P30 Series Grip Pin - Cylindrical
H&K Heckler & Koch
$5.95H&K P30 & 45 Series Cylindrical Grip Pin Compatible With: HK 45 HK 45 Compact HK P30 HK P30 V2 HK P30 V3 HK P30L HK P30L V2 HK P30L V3HKP-01808$5.95 -
HKP HK MP5 (.40 S&W) Locking Roller -6
HKP HK Parts
$11.95HK US MP540 Undersized Locking Roller, -6 The proper roller size is essential for headspacing the bolt gap correctly. 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...HKP-17566$11.95 -
HKP Front Sight Tower Ambi Sling Attachment Weldment
HKP HK Parts
$14.95HKP Front Sight Tower Ambi Sling Attachment Weldment Ambi sling loop that is welled and installed on all MP5F model front sight tower. A great upgrade for that custom build or for those that want to have the ability to have an ambidextrous sling loop at...HKP-17881$14.95 -
On Sale
HK MP5 Rear Sights Locking Washer
MKE
Now: $1.95Was: $2.45MKE HK MP5 Rear Sights Locking Washer Secures the rear sight assembly on MKE and HK MP5 models to maintain proper alignment. Compatible With: Century Arms AP5 HK MP5/MP5K HK SP5/SP5K Will work with all 90 series firearmsHKP-22240Now: $1.95Was: $2.45 -
Out Of Stock
HK VP9, HK VP40 Slide Racker - Right Side
HKP HK Parts
$49.95HK Parts HK VP9 and HK VP40 Right Side Slide Racker For those that would like a like a faster racking option and competitive shooters alike. The HK Parts "slide racker" is a drop in replacement part of your existing slide plate. Easy to install and a...HKP-17671$49.95 -
HK P30, P2000 Release Latch & Decocker
H&K Heckler & Koch
$32.95HK P30 & P2000 Release Latch & Decocker Compatible With: HK P30 HK P30L HK P2000 HK P2000SKHKP-01773$32.95 -
HK G36, SL8, HK417, MR762 Bolt Head Ejector
H&K Heckler & Koch
$19.95H&K HK G36/SL8/MR762/417 Bolt Head Ejector Compatible With: HK MR762 HK 417 HK G36 HK SL8HKP-01868$19.95 -
On Sale
HK MP5 Recoil Spring
MKE
Now: $8.45Was: $10.99MKE HK MP5 Recoil Spring Great replacement and spare recoil spring as this is a common repair and replacement item. Compatible With: HK MP5 Century Arms AP5 Clones & custom buildsHKP-22239Now: $8.45Was: $10.99 -
HK German Ambidextrous Sling Pin Replacement O-Ring
H&K Heckler & Koch
$5.95H&K German Ambidextrous Sling Pin Replacement O-Ring HK ambidextrous sling pin replacement O-ring for all ambidextrous sling pins. Brand new factory German manufacture. This item is a common wear/breakage part that does need to be replaced from time...HKP-19985$5.95 -
Out Of Stock
HK UMP, USC Lower Bolt Catch
HKP HK Parts
$22.95HK UMP & USC Bolt Catch For Last Round Hold Open New HK USA lower bolt catch. Compatible With: HK UMP HK USCHKP-19565$22.95