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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HKP Rear Sights Locking Washer
HKP HK Parts
$2.95HKP Rear Sights Locking Washer HK German rear sights toothed locking washer used in perfect working order.HKP-00869$2.95 -
H&K USP/USPC/VP40 Extractor Spring
H&K Heckler & Koch
$7.95H&K USP/USPC/VP40 Extractor Spring The extractor spring is one of the hardest working parts of your HK pistol. The extractor spring should be changed every 5K rounds. A must-have spare part to have on hand. Compatible With: HK USP 9, 40 .45...HKP-01079$7.95 -
HK German Factory P7 Series Recoil Spring
H&K Heckler & Koch
$19.95Factory German HK P7 Recoil Spring This is a hard-to-find replacement part for the P7 series. This is a new HK German replacement or spare recoil spring. Compatible With: HK P7 PSP HK P7 M8 HK P7 M10 HK P7 M13HKP-01077$19.95 -
Magpul M-Lok 3 Slots Rail Section
Magpul
$18.95Magpul M-Lok 3 Slots Rail Section Designed for use with all M-LOK compatible hand guards and forends, M-LOK aluminum rail sections allow the attachment of various 1913 Picatinny spec rail-mounted accessories such as lights, vertical grips, etc. Machined...HKP-20495$18.95 -
HKP 16x1 LH .45 Cal Thread Protector
HKP
$14.95HKP 16 x 1 LH .45 Cal Thread Protector USA manufactured .45 caliber thread protector, cap fits all .45 cal full size & compact barrels threaded 16mm X 1mm left hand thread. A must have item to protect your threaded barrels, exposed threads & your...HKP-19669$14.95 -
HKP HK SL8 & HK G36 Top Rail Screw
HKP HK Parts
$5.95HK SL8 & G36 Top Rail Screw This rail screw is the standard length rail screw used for all SL8 and G36 top rails. With the exception of the dual and single option models. A must have part and an easy part to loose or strip. Grab yours to have...HKP-20330$5.95 -
H&K Full Auto Trigger Pack Elbow Spring With Roller
H&K Heckler & Koch
$4.95H&K Full Auto Trigger Pack Elbow Spring With Roller Used- Good shape. This item is a factory HK German replacement part.HKP-16241$4.95 -
H&K Small Push Pin Replacement Spring
H&K Heckler & Koch
$1.95Replacement Spring for HK style push pin - Small A must have replacement item to have on hand. A quick and easy install spring to get your push pins back to working condition. A great replacement for those worn out springs that come loose while in...HKP-20368$1.95 -
HKP Semi Elbow Spring For Trigger Pack - Match Grade
HKP HK Parts
$3.74Match Grade Semi Auto Spacer Elbow Spring - USA Manufactured using the best isolated oil tempered, select spring steel available for match grade performance and the utmost longevity. For use on all HK semi auto trigger packs. A must have for those...HKP-18002$3.74 -
H&K HK P7 Series Grip Screw - Black
H&K Heckler & Koch
$8.95H&K HK P7 Series Grip Screw - Black HK German P7 series factory grip screw for the left or right side grip. The grip screw commonly strips out or can lose it's new finish with use. This part is a great spare to have on hand. Compatible...HKP-01229$8.95 -
H&K HK VP9, HK VP40 Half Shell Spring Washer - Black
H&K Heckler & Koch
$4.95H&K HK VP9, HK VP40 Half Shell Spring Washer - Black 2 units needed for complete set. Brand new factory German HK. This item is the item that cradles the firing pin and is covered by the firing pin sleeve and spring assembly.HKP-16832$4.95 -
H&K HK VP9/45/P Series Extractor Spring
H&K Heckler & Koch
$8.95HK VP9/45/P Series Extractor Spring A must-have repair and replacement part and a recommended part to change out when doing routine maintenance on your HK pistol. Compatible With: HK45 HK45C HK P30/P30L HK P30SK HK P2000 HK P2000SK HK VP9 HK VP9SKHKP-01501$8.95 -
H&K MP5K/SP89/SP5K 9mm Recoil Spring
H&K Heckler & Koch
$11.95HK German MP5K, SP89 Recoil Rod Assembly Spring This is a great replacement and spare part.HKP-01159$11.95 -
Choate MP5 Replacement Buffer For Folding Stock Or End Cap
Choate
$3.95Choate MP5 Replacement Buffer For Folding Stock Or End Cap Compatible With: Choate MP5 and MP5K stocks or end capsHKP-00116$3.95 -
H&K G3 Large Buffer Screw
H&K Heckler & Koch
$1.95HK G3 Large Buffer Screw This is the screw that screws in the back of the buffer. This is also needed to install the Magpul PRS2 stock. Used- in good, working condition.HKP-16981$1.95 -
H&K Grip Screw & Washer
H&K Heckler & Koch
$1.49H&K Grip Screw & Washer This is a surplus factory HK German part that is now out of production. Great to have as a spare and the cheapest price on the planet. Compatible With: G3 HK91 HK93 HK94 SP89 Other HK metal framed lowers with plastic...HKP-16335$1.49 -
RCM HK MP5/SP5 #27/90 Degree Locking Plate
RCM
$39.95RCM HK MP5/SP5 #27/90 Degree Locking Plate Machined and properly heat treated from ordnance grade steel. A must have component for users runing a suppressed set up or cycling a variety of ammunition. This will assist with fine-tuning pistol...HKP-21334$39.95 -
H&K G36/SL8 (5.56/.223)Forearm, Lower, Magwell - Push Pin
H&K Heckler & Koch
$34.95New HK German G36 & HK SL8 Push Pin For Forearm, Mag Well Or Lower Each push pin is a factory German part and is new. This is also required for those doing the SL8 to G36 style conversions. A factory German G36 uses three of these factory push pins...HKP-00804$34.95 -
HKP HK 9mm 13.5x1 Enhanced Thread Protector
HKP HK Parts
$24.95HKP HK 9mm 13.5x1 Enhanced Thread Protector Titanium manufactured enhanced thread protector in 13.5x1 LH for use with all threaded barrels. This unique design will fit over and protect the crown of your barrel for added protection...HKP-19497$24.95 -
H&K Magazine Catch - MP5, MP5K - Latest Style
H&K Heckler & Koch
$64.95H&K Magazine Catch - Latest Style Genuine HK mag release for factory and clone firearms. This component often resolves issues with mags not locking into position on HK clones and builds. Constructed from a single piece of steel unlike the...HKP-00911$64.95 -
H&K HK USP/USPC Trigger Spring
H&K Heckler & Koch
$8.95H&K HK USP/USPC Trigger Spring Compatible With: HK USP 9mm HK USP .40 S&W HK USP .45 ACP HK USP Compact 9mm HK USP Compact .40 S&W HK USP Compact .357 SIG HK USP Compact .45 ACPHKP-01252$8.95 -
H&K 10 Round HK VP9/VP40/USP Series/P Series Magazine Spring
H&K Heckler & Koch
$7.95New German HK Magazine Spring For 10 Round Magazines A must-have part as magazine springs are high wear and a common replacement item. Compatible With: HK USP 9mm HK USP 40 S&W HK USP Compact 9mm HK USP Compact 40 S&W HK USP Compact 357 SIG HK...HKP-01428$7.95 -
HKP HK G36, SL8 Forearm, Lower, Magwell U.S Push Pin - Black
H&K Heckler & Koch
$18.95HKP HK G36, SL8 Forearm, Lower, Magwell U.S Push Pin - Black U.S G36 push pin. Black oxide for the best looking finish. This push pin is also required for those doing the SL8 to G36 Style Conversions. A factory German G36 uses three of these factory push...HKP-20730$18.95 -
H&K German Rear Sight Spring
H&K Heckler & Koch
$4.95H&K German Rear Sight Spring HK German rear sight spring for rear diopter sights.HKP-00146$4.95 -
H&K 10 Round HK 45/45C Magazine Spring
H&K Heckler & Koch
$8.9510 Round HK 45 & 45C Magazine Spring The more you order, the more you save, as we offer volume discounts this spring. Compatible With: HK45 10 Round Magazine HK45C & USPC 4510 Round Magazine ...HKP-01848$8.95 -
H&K G36/MR556/MR762/416 (5.56/.223) & (7.62x51/.308) Extractor Spring
H&K Heckler & Koch
$8.95HK German Extractor Spring A must-have replacement wear part and a great item to have on hand. Compatible With: HK G36 HK G36K HK G36C HK SL8 HK 416 HK MR556HKP-00288$8.95 -
H&K G3 Crush Washer For Buffer Screw
H&K Heckler & Koch
$0.95HK G3 Crush Washer For Buffer ScrewHKP-16984$0.95 -
H&K German (5.56/.223) & (7.62x51/.308) Hammer Spring
H&K Heckler & Koch
$9.95New HK German Rifle Hammer Spring For All.308/.223 Semi & Full Auto Trigger Packs This is a must-have spare replacement part for your HK firearm. The rifle 308/556 hammer spring is also a popular upgrade to replace the hammer spring in 9mm and clones...HKP-00194$9.95 -
HKP SP5K 9mm Drop In Paddle Mag Release Upgrade Kit
HKP HK Parts
$74.95HK SP5K Anti-Rattle Roller Tipped "Paddle" Magazine Release Install Kit No modifications, no refinishing...complete drop-in kit included. New USA made busing for a drop-in install kit for the HK SP5K. This kit will allow any end-user to quickly,...HKP-18192$74.95 -
H&K HK MR556/MR762/416/417/G36/SL8 Complete Gas Piston
H&K Heckler & Koch
$50.95HK MR556, MR762, 416, 417, G36, & SL8 Complete Gas Piston New HK German gas piston assembly with three locking piston rings installed. This is a great spare part to have on hand, as the gas piston takes a lot of wear and tear. Compatible With: HK...HKP-00047$50.95 -
H&K German (5.56/.223) & (7.62x51/.308) Hammer Spring - Used
H&K Heckler & Koch
$4.95HK German Rifle Hammer Spring For All.308 & .223 Semi & Full Auto Trigger Packs This is a must have spare replacement part for your HK firearm. The rifle 308/556 hammers spring is also a popular upgrade to replace with the 9mm hammer spring in...HKP-18066$4.95 -
H&K HK MP5, MP5K Spare Parts Kit
H&K Heckler & Koch
$239.95H&K HK MP5, MP5K Spare Parts Kit HK MP5, HK SP5, HK94 & MP5K, SP89, SP5K Spare parts kits for the most commonly worn parts needed to keep your precious MP5/MP5K going. This offering also includes a pouch to safely store all your replacement parts...HKP-20619$239.95 -
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 10 Round HK USP/Mark 23 .45 ACP, P30 .40 S&W Magazine Spring
H&K Heckler & Koch
$8.9510 Round HK USP/Mark 23 .45 ACP, P30 .40 S&W Magazine Spring A must-have spare part, as magazine springs are prone to wear and tear. Compatible With: HK USP .45 10 round HK USP .45 Tactical 10 round HK Mark 23 10 round HK 9mm & 40 cal P30...HKP-01675$8.95 -
H&K (5.56/.223) & (7.62x51/.308) Hammer Spring- Extra Power
H&K Heckler & Koch
$14.95H&K (5.56/.223) & (7.62x51/.308) Hammer Spring- Extra Power New HK German extra power hammer spring for all .308/.223 Semi & Full Auto Trigger Packs. This is a must have spare replacement part for your HK firearm parts bin. The heavy hammer...HKP-16447$14.95 -
H&K 10 Round HK VP9SK/P30SK/P2000SK Magazine Spring
H&K Heckler & Koch
$7.95Magazine Spring A great wear and replacement item as this is a consumable part and prone to wear and tear. If your slide is not locking back on the last round or you are having issues with reliable feeding, the magazine spring may be fatigued and...HKP-01480$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 P30/USP/45/45C/P2000 Flat Spring
H&K Heckler & Koch
$12.95HK Flat Spring For Sear Catch This is a wear and replacement item on your HK pistol. A great spare part and needed spring to have on hand. Compatible With: HK USP 9mm HK USP .40 HK USP .45 HK USP Tactical, Elite, Expert HK USP Compact 9mm HK USP Compact...HKP-01259$12.95 -
H&K HK P Series LEM Elbow Spring
H&K Heckler & Koch
$8.95HK P Series LEM Elbow Spring Compatible With All LEM Models Below: HK P30 HK P30L HK P30SK HK P2000 HK P2000SKHKP-02498$8.95 -
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