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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H&K Semi Trigger Pack Or Sear Pack Elbow Spring W/ Roller
H&K Heckler & Koch
$29.95H&K Semi Trigger Pack Or Sear Pack Elbow Spring W/ Roller Each spring is a great replacement for the converted packs that have bent elbow springs or for those that used the original F/A elbow springs that were bent to shape and are prone to breakage.HKP-00070$29.95 -
H&K Burst Trigger Pack Compression Rod Spring
H&K Heckler & Koch
$10.95H&K Burst Trigger Pack Compression Rod Spring Burst pack compression spring for compression rod found in all HK Burst Trigger Packs. This part, along with the compression rod, is the number one most common wear or breakage parts in HK Burst Packs...HKP-16199$10.95 -
H&K HK USP/USPC/45/45C LEM Cocking Piece Elbow Hammer Rebound Spring
H&K Heckler & Koch
$7.95HK LEM Cocking Piece Elbow Hammer Rebound Spring This item is a common wear and replacement item for those who have LEM triggers installed. Compatible With: USP USPC HK45 HK45CHKP-02479$7.95 -
Lazy Wolf HK Reduced Power Hammer Spring - 12 lb.
Lazy Wolf
$9.95Lazy Wolf HK Reduced Power Hammer Spring - 12 lb. An exciting new offering as a joint collaboration from the widely renowned pistol smith Lazy Wolf Guns & HK Parts! This custom spring was designed exclusively by master trigger smith Rick Holm at LWG...HKP-18148$9.95 -
H&K HK P7 Series Piston Plunger, Detent Spring
H&K Heckler & Koch
$7.95HK P7 Series Piston Plunger, Detent Spring Compatible With: PSP P7M8 P7M10 P7M13HKP-01327$7.95 -
H&K 93/91/33/53/G3 (5.56/.223) & (7.62x51/.308) Bolt Locking Lever Spring For Bolt Head
H&K Heckler & Koch
$4.95HK Bolt Carrier Bolt Locking Lever Spring New HK German factory bolt carrier locking lever spring for locking lever latch. Compatible With: HK G3, HK91 PTR models HK93, 33, 53 Other clones and custom buildsHKP-16274$4.95 -
H&K German Hammer Spring (5.56/.223 & 7.62x51/.308) - Used
H&K Heckler & Koch
$4.95HK German Rifle Hammer Spring For All .308 & .223 Semi & Full Auto Trigger Packs The rifle 308/5.56 hammer spring is a popular upgrade in 9mm builds experiencing light primer hits. This is the factory correct 25 lb. weight for positive detonation...HKP-18066$4.95 -
GSG9 HK G36/SL8 (5.56/.223) Forearm, Lower, Magwell - Push Pin
GSG9
$21.95HK G36, SL8 Push Pin For Forearm, Magwell & Lower Each push pin/locking pin retains the forearm, magwell & lower to the upper receiver. Each G36 style firearm uses a total of 3X of these push pins. Compatible With: G36 G36K G36C G36...HKP-18221$21.95 -
H&K HK MR556/416 Ejection Port Spring
H&K Heckler & Koch
$7.95H&K HK MR556/416 Ejection Port Spring Compatible With: HK MR556 HK 416HKP-02616$7.95 -
H&K HK MR556/MR762/416 Clamping Sleeve Safety Lever
H&K Heckler & Koch
$7.95H&K HK MR556/MR762/416 Clamping Sleeve Safety Lever There are one of the same pin on both sides. Compatible with: HK MR556 HK 416 HK MR762HKP-15252$7.95 -
H&K HK MR556/MR762/416/417 Detent Takedown Pin
H&K Heckler & Koch
$7.95H&K HK MR556/MR762/416/417 Detent Takedown Pin Compatible With: HK MR556 HK 416 HK MR762 HK 417HKP-02540$7.95 -
H&K Elbow Spring Spacer For Full-Auto
H&K Heckler & Koch
$5.95H&K Elbow Spring Spacer For Full-Auto - UsedHKP-03330$5.95 -
H&K HK VP9B Mag Release Button Set - S, L, XL
H&K Heckler & Koch
$19.95HK VP9B Mag Release Button - S, L & XL New HK German Manufacture. Will fit the new VP9B button mag release model. A perfect way to customize your mag release fitment. Compatible With: VP9B and VP9LB models onlyHKP-19746$19.95 -
Out Of Stock
H&K HK VP9/VP9SK, HK VP40 Disassembly Safety
H&K Heckler & Koch
$9.95Dismounting Or Disassembly Safety HK VP9, VP40 Compatible With: HK VP9 HK VP9SK HK VP40HKP-16792$9.95 -
$8.95 -
H&K HK P7M8/P7M13 Piston Retaining Roll Pin
H&K Heckler & Koch
$4.95HK P7 M8, M13 Piston Retaining Roll PinHKP-16435$4.95 -
HK G36/SL8 (5.56/.223) Factory Recoil Buffer
USA
$16.95HK G36 Or SL8 Factory Recoil Buffer A must have spare part as the buffer is prone to wear and breakage. Compatible With: All HK G36 models SL8 models ClonesHKP-18541$16.95 -
H&K HK MR556/MR762/416 Bolt Catch Pin
H&K Heckler & Koch
$4.95H&K HK MR556/MR762/416 Bolt Catch Pin The factory roll pin is used to hold the bolt catch in place. Great to have on hand in the event this item becomes lost or damaged when doing maintenance Compatible With: HK MR556 HK 416 HK MR762HKP-02677$4.95 -
H&K UMP (.40 S&W/.45 ACP/9mm) Paddle Mag Release
H&K Heckler & Koch
$16.95UMP Paddle Magazine Release This is a common repair and replacement part as they are easy to break on the UMP lower. Simple and easy to install with no gunsmith needed or required. Compatible With: UMP .45 UMP .40 UMP 9mm Please Note: This...HKP-00810$16.95 -
MKE Large Butt Stock Push Pin
MKE
$6.95MKE Large Push Pin 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 large push pin is an...HKP-21593$6.95 -
H&K HK416 A5 Factory German Extended Castle Nut
H&K Heckler & Koch
$75.95H&K HK416 A5 Factory German Extended Castle Nut Original HK Factory German steel 416 A5 Extended Castle Nut. Perfect for MR556, HK 416 A5 builds, or upgrades.HKP-19164$75.95 -
H&K HK USP Full Size 9mm/.40 S&W Extractor
H&K Heckler & Koch
$39.95H&K HK USP Full Size 9mm/.40 S&W Extractor New HK German. A great spare & replacement item for your USP 9mm or USP .40 pistol. Compatible With: HK USP 9mm HK USP 40 S&W HK USP Tactical, Expert, EliteHKP-00324$39.95 -
H&K HK USP/45/45C Detent Compression Spring
H&K Heckler & Koch
$8.95HK Slide Detent Compression Spring For All HK USP & HK45, HK45C Models The detent spring is needed for positive de-cocking and safety functions of the detent plate. A spare and replacement part as it is prone to breakage and wear. This is also one of...HKP-01257$8.95 -
H&K HK USP Series Old Style Firing Pin Block Spring
H&K Heckler & Koch
$9.95HK USP Series Old Style Firing Pin Block Spring In order to use the new firing pin block spring, you also have to upgrade the firing pin, firing pin block, as well as the firing pin block spring. HK part #214192 has been replaced with...HKP-02149$9.95 -
H&K 8 Round HK USPC/45C .45 ACP Floorplate w/ Pinky Rest - Black
H&K Heckler & Koch
$12.95H&K 8 Round HK USPC/45C .45 ACP Floorplate w/ Pinky Rest - Black HK factory German, vintage style, all polymer 8 round magazine floor plate with finger rest. This floorplate can become cracked and worn with use and is a great spare part to have on...HKP-01199$12.95 -
H&K 10 Round HK USP .45 ACP Standard Floor Plate - Black
H&K Heckler & Koch
$10.95H&K 10 Round HK USP .45 ACP Standard Floor Plate - Black Perfect for concealed carry as the flat floor plate has a lower profile. Compatible With: HK USP .45 Magazine - 10 round HK USP .45 Tactical Magazine - 10 roundHKP-01194$10.95 -
H&K HK MR556/416 Ejection Port Cover Door Assembly
H&K Heckler & Koch
$89.95HK German HK 416, MR556 Ejection Port Cover Door Assembly Complete This is the newer polymer style cover found on the latest HK 416 and MR556's. This is the complete ejection port door assembly needed on all AR15 or MR556/HK416 models. Can also be used...HKP-16951$89.95 -
Out Of Stock
HKP HK VP9/VP9SK, VP40 Firing Pin w/ Striker - Black
HKP HK Parts
$59.95HKP HK VP9/VP9SK, VP40 Firing Pin w/ Striker - Black The lightest firing pin for your VP9, VP40 pistol. Upgrade your HK VP series pistol to a Ti firing pin. This will allow for a faster & reduced lock time for faster shots and improved accuracy. By...HKP-17643$59.95 -
Tac Latch - PTR Spec
$69.95Tac Latch (latest Generation) PTR Spec - PTR .308 Firearms The new updated style of Tac latch is made specifically for the PTR 91 .308 receiver and will require very little modification to the firearm for installation. A major overhaul of the existing...HKP-17611$69.95 -
H&K USP Detent Plate Variant 5, 6, 9 & 10
H&K Heckler & Koch
$19.95HK Detent Plate For USP Variant 5, 6, 9, & 10 Conversions This plate, when installed, will allow you to have the "safety" only and NO decock function on your pistol. This plate will fit and work for both left-hand and right-hand setups. Compatible...HKP-01247$19.95 -
H&K G36K Gas Piston Rod/Spring Assembly
H&K Heckler & Koch
$89.95New HK German G36K Gas Piston Rod/Spring Assembly Great for spare parts or to use on that HK SL8-G36 conversion.HKP-00284$89.95 -
Out Of Stock
HKP AR Grip Screw 1/4x28x1 Hex w/ Locking Washer
HKP HK Parts
$1.95HKP AR Grip Screw 1/4x28x1 Hex w/ Locking Washer This replacement screw is to mount your AR-15/AR-10 pistol grip. 1/4x28x1 with a star lock washer. The best option to use for new builds or to replace your worn out or stripped screw. Black oxide finish...HKP-20685$1.95 -
H&K UMP/USC (.40 S&W/.45 ACP/9mm) Recoil Buffer
H&K Heckler & Koch
$20.95HK German USC & UMP Recoil Buffer Replaceable spare lower housing or buffer for buffer housings. This is a high wear and replacement item and a must-have for spare parts. Compatible With: HK USC .45 HK UMP modelsHKP-00594$20.95 -
H&K HK MR556/416 Firing Pin
H&K Heckler & Koch
$54.95H&K HK MR556/416 Firing Pin New HK German manufactured. This is a great item to have on hand as the firing pin is one of the most abused components in the HK MR556 and HK 416 weapon systems. Compatible With: HK MR556 HK 416 HK CR556 HK...HKP-00045$54.95 -
H&K HK P7M8/P7M13 Detent, Piston
H&K Heckler & Koch
$9.95H&K HK P7M8/P7M13 Detent, Piston Compatible With: P7M8 P7M13HKP-16327$9.95 -
H&K SP5K 9mm Drop In Paddle Mag Release Upgrade Kit
H&K Heckler & Koch
$129.95German HK SP5K Anti-Rattle Roller Tipped Paddle Magazine Release Kit No modifications, no refinishing...complete drop-in kit included New HK German & USA made paddle mag release kit for the HK SP5K. This kit will allow any end-user to quickly...HKP-18082$129.95 -
H&K HK 45/45C/USP/USPC/P2000 Slide Release Spring
H&K Heckler & Koch
$9.95HK Slide Release Spring This is a high-wear item, as it cannot be reused once damaged or removed. It must be replaced with a new spring. Compatible With: HK USP 9mm, .40 & .45 HK USP Compact 9mm, .40 & .45 HK USP Tactical, Elite & Expert...HKP-01260$9.95 -
H&K HK 416 Enhanced Firing Pin/Retaining Pin
H&K Heckler & Koch
$19.95HK 416 Firing Pin Retaining Pin- New Style This part is the newer style pin that is goldish, super hardened, and much less prone to wear and tear. The enhanced version is the most robust, easiest-to-use pin available. Compatible With: HK 416 AR15, M4...HKP-02658$19.95 -
H&K HK MR556/MR762/416 Forward Assist Pin
H&K Heckler & Koch
$4.95H&K HK MR556/MR762/416 Forward Assist Pin Compatible With: HK MR556 HK 416 HK MR762HKP-02662$4.95 -
H&K HK P30SK Firing Pin Safety Pin
H&K Heckler & Koch
$4.95H&K HK P30SK Firing Pin Safety Pin This is a factory original HK part manufactured in Germany.HKP-18524$4.95