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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Out Of StockOn Sale
HK90, MP5K Sear Catch - Steel - US
HKP HK Parts
Now: $38.36Was: $47.95HKP HK Parts HK90, HK MP5K Sear Catch - Steel - USA Made - Billeted Machined - Steel Hard to find and important for keeping your HK build 922r compliant. This US-made sear counts as one US-compliant part for your rifle or build. Machined from a bar of...Now: $38.36Was: $47.95 -
HK P7 Series Drop Safety Catch Spring
H&K Heckler & Koch
$9.95HK P7 Drop Safety Catch Spring This is one of the most common wear items on the P7 series of firearms—a must-have spare part and hard to find. Compatible With: PSP P7M8 P7M13 P7M10$9.95 -
On Sale
HK MP5, MP5K, HK93, HK91 Sight Clamping Screw - Rear Retainer
H&K Heckler & Koch
Now: $4.46Was: $4.95HK German Rear Sight Retainer / Clamping ScrewNow: $4.46Was: $4.95 -
On Sale
HK Standard Roller 8.00mm - Used
H&K Heckler & Koch
Now: $7.16Was: $7.958.00mm Standard Size (zero or unmarked) For HK Roller Lock Bolt Head HK spec unmarked 8.00mm roller that will fit all HK bolt heads including HK91/G3, HK93/33/53, HK94, MP5, SP89 all clones and the Cetme & Cetme clones. The best roller on the market...Now: $7.16Was: $7.95 -
Out Of StockOn Sale
HK VP9, P Series Extractor
H&K Heckler & Koch
Now: $49.46Was: $54.95HK VP9/P Series Extractor Brand new factory HK German with red loaded chamber indicator present. Compatible With: HK VP9, VP9 Tactical, VP9SK HK VP9A1 F, VP9A1 K HK P30, P30L, P30S & P30SK HK P2000 HK P2000SKNow: $49.46Was: $54.95 -
On Sale
HK416, HK417, MR556, MR762 Buffer Retaining Pin
H&K Heckler & Koch
Now: $14.36Was: $15.95H&K HK MR556/MR762/416/417 Buffer Retaining Pin New HK German proprietary HK designed buffer pin unique to the HK 416 and MR 556 series. Compatible With: HK MR556 HK 416 HK MR762 HK M27Now: $14.36Was: $15.95 -
On Sale
HK90 Series Stock Locking Pin - Large
MKE
Now: $6.25Was: $6.95MKE Large Push Pin for your HK90 Series Stock Each large stock push pin is used to retain the stock to the receiver on the 90-series firearms. These are great replacement or spare part to keep on hand as they fit all of the 90-series firearms below. The...Now: $6.25Was: $6.95 -
On Sale
HK Spring - Rear Sight - German
H&K Heckler & Koch
Now: $4.46Was: $4.95H&K German Rear Sight Spring HK German rear sight spring for rear diopter sights.Now: $4.46Was: $4.95 -
On Sale
HK UMP, USC Stock Axle Pin
H&K Heckler & Koch
Now: $27.86Was: $30.95HK German UMP Rear Stock Axle Pin This is the HK factory German stock pin that allows you to attach the stock to either the factory receiver of a UMP or for those that are doing the USC to UMP conversion. This is required to attach the stock to the...Now: $27.86Was: $30.95 -
On Sale
HK 90 Series Hammer - MP5/G3/93/53/33 - German - Used
H&K Heckler & Koch
Now: $26.95Was: $29.95Hammer, Full Auto HK 90 Series Trigger Packs - German HK - Used German HK Hammer- used, surplus in VG-EXC shape and in perfect working order. This hammer is the hammer that is most commonly used in semi auto trigger packs as the secondary sear catch is...Now: $26.95Was: $29.95 -
On Sale
HK Ambidextrous Sling Pin O-Ring
H&K Heckler & Koch
Now: $1.75Was: $1.95H&K Ambidextrous Sling Pin O-Ring HK ambidextrous sling pin replacement O-ring for all ambidextrous sling pins. This item is a common wear/breakage part that does need to be replaced from time to time. This is the part that creates the + seal to keep...Now: $1.75Was: $1.95 -
On Sale
HK VP9, VP9SK Cocking Aid Filler Left, Right Set
H&K Heckler & Koch
Now: $17.95Was: $19.95Cocking Aid Filler Piece Set For - HK VP9, VP9SK HK VP9/VP9SK Filler set replaces the cocking aids for a "flat" cocking area rather than raised cocking aids as comes standard on the HK VP9 pistol. These are a drop in part for the HK VP9 pistol. Brand new...Now: $17.95Was: $19.95