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, USPC Sear Roll Pin
H&K Heckler & Koch
$5.95Sear Roll Pin HK USP 9mm .40 S&W .45 ACP HK USP Compact 9mm .40 S&W .357 SIG .45 ACP HK45 HK45 CompactHKP-01815$5.95 -
HK416, MR556 Bolt Carrier Roll Pin
H&K Heckler & Koch
$6.95H&K HK MR556/416 Roll Pin for Catch On Bolt Carrier This roll pin is used in the bolt carrier to secure the catch. Compatible With: HK MR556 HK 416HKP-16847$6.95 -
Out Of Stock
HK45, HK45 Compact V3 Left Side Decock Only Lever
H&K Heckler & Koch
$49.95Decock Lever ONLY For Left Side Of Frame - HK45, HK45C This control lever is for those who are right-handed and want the control lever on the left-hand side of the frame with the decock function only. Compatible With: HK45, HK45...HKP-02706$49.95 -
HK45, HK45 Compact Left Side Safety Lever
H&K Heckler & Koch
$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...HKP-01770$29.95 -
HK G36, SL8 Extractor
H&K Heckler & Koch
$79.95G36 & HK SL8 German Extractor For Bolt Head New HK German. This is a great item to keep as a spare. Compatible With: All G36 Variants SL8-1, SL8-6HKP-00287$79.95 -
HK33, HK53, HK93 Firing Pin
H&K Heckler & Koch
$79.95H&K 93, 53, & 33 (5.56/.223) Firing Pin This is the factory-correct HK German firing pin and is a great replacement part. This is also a great upgrade for your HK 223.556 clones. This part is no longer available from HK as this part is out of...HKP-00192$79.95 -
HK45, HK45C, USP Compact Magazine Locking Plate
H&K Heckler & Koch
$7.95HK USPC, 45, & 45C Magazine Locking Plate New factory German HK. Compatible With: HK45 HK45 Tactical HK45C HK45C Tactical HK USPC .45 HK USPC .45 TacticalHKP-02250$7.95 -
HK UMP, USC Stock Block B Thumb Screw
HDPS
$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.HKP-15731$74.95 -
Out Of Stock
HK MP5 Barrel Retaining Pin - 5.015mm
H&K Heckler & Koch
$14.95H&K 90 Series Barrel Retaining Pin - 5.015mm Each barrel pin is used for installing a new or replacement barrel. HK suggests using a new factory barrel pin when installing or reinstalling an HK barrel. Compatible With: HK MP5, SP5, MP5K,...HKP-22284$14.95 -
HK G36, SL8 Magazine Paddle Release
USA
$17.95US HK G36 and HK SL8 Magazine Paddle Release HK G36 Mag Release or mag catch. Compatible With: HK SL8 HK G36 HK G36K HK G36CHKP-18222$17.95 -
HK416, MR556 Extractor Axle Pin
H&K Heckler & Koch
$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 A5HKP-00040$11.95 -
HK417, MR762 Magazine Catch Spring
H&K Heckler & Koch
$9.95H&K HK MR762/417 Magazine Catch Spring New HK German manufacture. Factory correct magazine catch for the magazine release. Compatible With: HK MR762 HK 417 HK G28HKP-16520$9.95