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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On Sale
HK UMP, USC Lower Locking Pin
H&K Heckler & Koch
Now: $33.26Was: $36.95HK German UMP Lower Locking Pin For use with all HK UMP lowers and USC to UMP conversions. New HK German manufacture.Now: $33.26Was: $36.95 -
On Sale
HK416, MR556, G36, SL8 Gas Piston
USA
Now: $71.95Was: $79.95HK G36, HK SL8, HK 416, & HK MR556 Gas Piston Complete assembly with 3X rings installed and nitrided black. Counts as one US-made compliant part for your SL8-G36 style conversion. This is one of the best parts to use on the conversion as it is one of...Now: $71.95Was: $79.95 -
On Sale
HK UMP, USC Stock Block B Sling Pin - Thumb Screw Style
HDPS
Now: $67.45Was: $74.95HDPS HK UMP/USC (.40 S&W/.45 ACP/9mm) Stock Block B Sling Pin-Thumb Screw Style The original thumb screw version for all stock block B's.Now: $67.45Was: $74.95 -
On Sale
HK417, MR762 Pin - Gas Block
H&K Heckler & Koch
Now: $7.16Was: $7.95H&K HK MR762/417 Gas Block Pin This is the retaining pin for an HK MR762 gas block. A must have as HK says you have to use new pins once they are removed. Compatible With: HK MR762 HK 417Now: $7.16Was: $7.95 -
On Sale
HK45 Series, USP Series Slide Plate
H&K Heckler & Koch
Now: $8.96Was: $9.95H&K HK USP Series/45 Series Slide Plate Compatible With: HK USP 9mm, USP .40 HK USP .45 HK USP Compact 9mm & .40 S&W HK USP Compact .45 ACP All HK Tactical Models HK Elite, Expert HK45C, HK45 HK45C Tactical, HK45 TacticalNow: $8.96Was: $9.95 -
On Sale
HK45, P30, USP, USP Compact, P2000 Hammer Spring
H&K Heckler & Koch
Now: $8.96Was: $9.95Hammer Spring This is the stock hammer spring for many P30 models and is used for the heavy TGS and heavy and light LEM conversions on the USP, USPC, P30 & HK45 models. Compatible With: USP Full Size LEM & V4 USP Compact LEM &...Now: $8.96Was: $9.95 -
On Sale
HK45, HK45 Compact Left Side Safety Lever
H&K Heckler & Koch
Now: $26.95Was: $29.95HK 45/45C Left Side Safety Lever This control lever is for those who are right-handed and want the control lever on the left-hand side of the frame. This is the V1 selector with a decocking function and safety...Now: $26.95Was: $29.95 -
On Sale
HKP HK CC9 IWB Clip - Minimalist
HKP HK Parts
Now: $47.96Was: $59.95HKP HK CC9 IWB Clip - Minimalist The HKP HK CC9 IWB clip offers a minimalist solution for absolute concealment. When a holster creates undesired printing, our IWB eliminates the bulk to keep the pistol safe from discovery. Our IWB clip fits snug...Now: $47.96Was: $59.95 -
On Sale
HK21E, HK23E Rear Sight Base
HKP HK Parts
Now: $31.16Was: $38.95HKP HK21E/23E Rear Sight Base US manufactured billeted from solid ordnance grade bar stock. Each unit is precisely machined to factory tolerances. Requires post installation machining to accommodate a scope. Compatible With: HK21E HK23ENow: $31.16Was: $38.95 -
On Sale
HK G36, SL8 Firing Pin - All Variants
H&K Heckler & Koch
Now: $53.96Was: $59.95HK German G36/SL8 Firing Pin This is a great spare to have on hand. The firing pin fits all G36, G36K, G36C & SL8 variants. Compatible With: HK G36/G36K/G36C HK SL8Now: $53.96Was: $59.95 -
On Sale
HK USP V2, V6, V10 LH Control Lever
H&K Heckler & Koch
Now: $39.56Was: $43.95New HK German USP Full Size Control Lever For Variants 2, 6, 10 A common item to convert the USP from a right-handed shooter to a left-handed operation. This is the control lever for the right side of the firearm for left-handed shooters. Compatible...Now: $39.56Was: $43.95 -
On Sale
HK416, MR556 Extractor Axle Pin
H&K Heckler & Koch
Now: $10.75Was: $11.95HK MR556 & 416 Extractor Axle Pin This factory HK German part holds the extractor in place on the bolt head. This item needs to be changed each time it is removed per HK. Compatible With: HK MR556 HK 416 M27 HK 416 A5Now: $10.75Was: $11.95