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.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
HKP 1st Gen Roller Retainer Plate To Spring Upgrade
HKP HK Parts
$9.95HKP 1st Gen Roller Retainer Plate To Spring Upgrade This action 3 roller retainer spring for all 1st Generation bolt heads replaces the oval-shaped roller retainer plate. HK made a wire spring as an upgrade for later production bolt heads to improve the...HKP-02119$9.95 -
H&K HK USP/USPC Magazine Spring
H&K Heckler & Koch
$8.95H&K HK USP & USPC Magazine Spring HK recommends that for optimum performance, one should change out the magazine springs during regular maintenance intervals or when keeping the pistol magazines loaded for long periods. Compatible With: HK USP...HKP-01425$8.95 -
H&K 91/G3 (7.62x51/.308) Recoil Spring
H&K Heckler & Koch
$7.95HK German G3, 91, PTR Recoil Spring Best price in the country, on a new German HK factory recoil spring. No surplus or used springs here. Factory-fresh and HK German. Stock up at this price you can afford to keep a few as spares, why buy surplus springs...HKP-00360$7.95 -
GSG 22 Round GSG-5 .22LR Magazine Spring
GSG German Sports Guns
$4.95GSG 22 Round GSG-5 .22LR Magazine Spring A must-have replacement spare part as the mags are used or stored. Perfect for those who have weak feeding Promag GSG mags, as these mag springs will help get the mags running as they should. Compatible...HKP-14548$4.95 -
H&K HK Pistol Match Trigger Return Spring
H&K Heckler & Koch
$8.95HK Pistol Match Trigger Return Spring This is the TRS that is in the Match trigger kit. This spring works better with the SA/DA and is lighter than the standard trigger return spring. This is a great spare part to have on hand...HKP-02666$8.95 -
H&K Push Pins (One large & One small)
H&K Heckler & Koch
$15.49HK Set Of Two (One Large And One Small) Push Pins -Used These are great replacements or spare parts to keep on hand. Compatible With: HK91 G3, 33, and 93 MP5 SP89 PTR or even the GSG-5 family of guns. Please Note: The GSG5 will take the...HKP-00673$15.49 -
HKP Binary Selector Lever Set Screw
HKP HK Parts
$1.98HKP Binary Selector Lever Set Screw This replacement screw is to mount your Franklin Armory BFS selectors. A great spare screw to replace damaged screws or lost screws as they are small in dimension and very easy to misplace. A must have set screw to...HKP-20686$1.98 -
H&K MP5, HK94 Recoil Spring
H&K Heckler & Koch
$12.95HK German MP5, HK94 Recoil Rod Assembly Spring Great replacement and spare recoil spring as this is a common repair and replacement item. Compatible With: HK MP5 HK94 Zenith, POF, AA Clones & custom buildsHKP-01652$12.95 -
HKP Rear Sight Oval Washer
HKP HK Parts
$2.95HKP Rear Sight Oval Washer HK German oval washer for the rear sight diopter style assemblies. This is the needed washer used in conjunction with the locking washer. Fits and works with all diopter-style rear sights.HKP-00870$2.95 -
HK, Walther, Colt, .22LR Barrel Adapter O-Ring
USA
$2.95HK, Walther, Umarex 416, Colt M4 or MP5-A5 .22 Barrel Adapter O-Ring. Made from the highest quality & very durable Viton material. The O-ring on the adapter can tear with use or become brittle over time. Be sure to grab a few extra rings with your...HKP-17379$2.95 -
H&K Oversized Barrel Retaining Pin - 5.25mm
H&K Heckler & Koch
$9.95H&K Oversized Barrel Retaining Pin - 5.25mm This is the barrel pin used for installing a new or replacement barrel. HK suggests using a new factory barrel pin when installing or reinstalling an HK barrel in the trunion. Each pin is slightly oversized...HKP-16954$9.95 -
H&K Magazine Catch Spring
H&K Heckler & Koch
$4.95H&K Magazine Catch Spring New HK German manufacture, not used, worn out surplus springs. Perfect spare and a must-have mag catch spring for all 90 series rifles that use a detachable magazine. Compatible With: HK 91, G3 & PTR-91 HK...HKP-01917$4.95 -
H&K MP5 & MP5K Style Firing Pin Spring
H&K Heckler & Koch
$26.95H&K MP5 & MP5K Style Firing Pin Spring The latest style of firing pin available is stronger and much more durable than the standard non-braided firing pin. Compatible With: MP5, HK94, SP5 MP5K, SP5K, SP89 MP5/40, MP5 10mm, MP5 ...HKP-00063$26.95 -
H&K HK MR556/416 Enhanced Buffer Spring
H&K Heckler & Koch
$19.95Enhanced HK German MR556 & 416 Buffer Spring The HK MR556/416 buffer spring will also work with other AR-15 and M-16 rifles. This is the finest AR15-style buffer spring available. It is a high-wear item and a must-have replacement part. Compatible...HKP-00039$19.95 -
HK USP/USPC/45 Match Hammer Spring
H&K Heckler & Koch
$18.95HK USP, USPC, & HK45 Match Hammer Spring The match hammer spring is also known as the USPC standard hammer spring. This is also the correct spring needed for the light, TGS, and LEM conversion for the USPC & other custom pistol configurations...HKP-01410$18.95 -
H&K HK 9mm Barrel Thread Protector O-Ring - Black
H&K Heckler & Koch
$4.95HK German 9mm Barrel O-ring - Black The O-ring is a high-wear and replacement item. To save money - order 10 or more and get an additional $1 off per O-ring. Compatible With The Following Barrels That Have An O-ring Groove: HK USP 9mm HK USP Compact...HKP-00908$4.95 -
HKP MP5 & MP5K Barrel Thread Protector - 1/2x28
HKP HK Parts
$14.95HKP MP5 & MP5K Barrel Thread Protector - 1/2x28 New US made 1/2x28 thread protector designed for HK MP5, MP5K 3-lug & threaded barrel applications. This is the ideal thread protector for use on MP5, MP5-N & MP5K-N style 3-lug and threaded...HKP-16883$14.95 -
H&K MP5 & HK94 Firing Pin Spring
H&K Heckler & Koch
$9.95HK German MP5 & HK94 Firing Pin Spring Fits all of the MP5, SP5, SP5K, MP5K 9mm and 40/10 Variants including MP5, 94 clones.The firing pin is one of the most common repair and replacement items. Compatible With: MP5 SP5 SP5K MP5K 9mm & 40/10...HKP-00062$9.95 -
HKP HK MP5 .22 Sling Clip Kit - Black
HKP HK Parts
$24.95HKP HK MP5 .22 Sling Clip Kit - Black Each unit will fit all models of the MP5 .22 that have the 3 mounting holes on the left side of the magwell. This item installs in a few mins and comes complete with all you need for the install. With the addition of...HKP-15706$24.95 -
H&K Cocking Tube End Cap-Steel
HKP HK Parts
$14.95Cocking Tube End Cap - Steel - USA This is the finest all steel cocking tube end cap available at a price that is simply the best part for the money anywhere. Nobody offers a part of this quality at this price. Manufactured from solid billet steel and...HKP-17580$14.95 -
H&K UMP (.45 ACP) 25 Round Magazine Spring
H&K Heckler & Koch
$9.95H&K UMP (.45 ACP) 25-Round Magazine Spring Perfect for spares and to have on hand as these are a consumable item that needs to be replaced from time to time. A must-have item if you own a USC/UMP conversion or UMP.HKP-01548$9.95 -
H&K HK VP/P30 Magazine Spring
H&K Heckler & Koch
$8.95HK VP9, VP40 & P30, P30S & P30L - Magazine Spring A must-have replacement item as magazine springs should be replaced regularly as this is a consumable part and is prone to wear and tear. Compatible With All Standard Capacity 9mm & .40...HKP-01613$8.95 -
HKP Rail Mount Compensator Replacement Screw Set
HKP HK Parts
$4.95Replacement Screws for Rail Mount Compensator Replacement screw set for the HK Parts Rail Mount Compensators. This includes (2) screws. Compatible With: All HK Parts Rail Mount CompensatorsHKP-19674$4.95 -
H&K HK MR556/MR762/416/417 Firing Pin Spring
H&K Heckler & Koch
$14.95HK MR556, MR762 Firing Pin Spring - German This part is great to have on hand as this item is a high wear and replacement part and one of the most common breakage parts on the HK 416/MR556 rifles. Compatible With: HK MR556 HK MR762 HK 416 HK 417 HK...HKP-00928$14.95 -
HKP 90 Series Sear
HKP HK Parts
$47.95HK USA-Made Sear, Catch-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 solid ordnance grade steel, with the...HKP-00378$47.95 -
Ejector Lever Axle Retaining Spring
USA
$1.95Ejector Lever Axle Retaining Spring This is the perfect spring ring to replace your worn out ejector lever axel spring ring. Made out to HK spec for the best US replacement part on the market. Replacement of the retaining spring clip is necessary to keep...HKP-20629$1.95 -
H&K HK P30/USPC/45C/P2000 Firing Pin Spring
H&K Heckler & Koch
$8.95HK P30/USPC/45C/P2000 Firing Pin Spring A must have spare replacement part to keep on hand and to swap out during pistol servicing. Compatible With: HK USP Compact 9mm HK USP Compact 40 & .357 HK USP Compact 45 HK P2000 Series HK P2000SK Series HK...HKP-01502$8.95 -
PTR HK 91/G3 (7.62x51/.308) Rear Push Pin Reinforcement Weldment
PTR
$19.95HK91, G3, PTR, CETME Push Pin Reinforcement Weldment HK91/G3/PTR91 or CETME steel receiver flat weldment that is added to the rear of the receiver where the 2 large stock push pins install to reinforce this section of the receiver against damage or use...HKP-18224$19.95 -
H&K HK P30 Series Trigger V4 Medium Weight Return Spring
H&K Heckler & Koch
$14.95Trigger Return Spring For V4.1 or Combat Defensive Action (CDA) Trigger for the HK P30, P30L pistols. This spring is also known as the medium weight trigger return spring. Found on all (European CDA) variant 4.1's. Compatible With: P30 P30L P30S All LEM...HKP-16745$14.95 -
H&K 8 Round HK P7 PSP/P7M8 9mm Magazine Spring
H&K Heckler & Koch
$8.958 Round HK P7 PSP & P7M8 9mm Magazine Spring Compatible With: P7 PSP P7M8HKP-01357$8.95 -
H&K Rear Sights Windage Screw - HK 90 Series
H&K Heckler & Koch
$4.95H&K Rear Sights Windage Screw - HK 90 Series This is a hard-to-find rear sight screw new from HK Germany - not surplus.HKP-00867$4.95 -
H&K HK USP/45 Firing Pin Spring
H&K Heckler & Koch
$7.95H&K HK USP/45 Firing Pin Spring Compatible With: HK USP 9mm HK USP 40 HK USP 45 HK USP Tactical models HK USP Expert, HK Elite HK45, HK45 TacticalHKP-01080$7.95 -
HKP Spare Buffer For Folding Stocks & End Caps
HKP HK Parts
$9.95HKP Spare Buffer For Folding Stocks & End Caps New US manufactured flat style "H"buffer to replace the factory HK buffer on MP5K folding stocks and end caps. As well as a spare or replacement buffer for the MP5 & MP5K folding B&T stocks. Made...HKP-17886$9.95 -
H&K 91/G3 (7.62x51/.308) Firing Pin Spring
H&K Heckler & Koch
$9.95HK German HK G3, HK91, & PTR Firing Pin Spring This is a common repair and replacement item and is great for spares as this is a common breakage part.HKP-00498$9.95 -
Out Of Stock
H&K Barrel Retaining Pin - 5.15mm
H&K Heckler & Koch
$0.00H&K Barrel Retaining Pin - 5.15mm This is the barrel pin used for installing a new or replacement barrel. HK suggests using a new factory barrel pin when installing or reinstalling an HK barrel in the trunion. Each pin is slightly oversized for...HKP-01662$0.00 -
H&K HK Mark 23 Thread Protector
H&K Heckler & Koch
$24.95New factory HK Mark 23 SOCOM thread protector This is the only thread protector that HK offers that will fit the HK Mark 23 Pistol. This is a hard-to-find item and a must-have for all MK23 Owners. Compatible With: All H&K Mark 23/ SOCOM barrels...HKP-00293$24.95 -
MP5 40/10 Extractor Spring
$9.95HK MP5 40/10 & .357 - Extractor Spring The extractor spring is the most common wear item on an MP5 and a must-have spare and replacement part. HK Germany no longer makes the MP5 40/10 extractor spring, and they are no longer available. Our offering...HKP-00409$9.95 -
H&K 12 Round HK USP/Tactical .45 ACP Magazine Spring
H&K Heckler & Koch
$8.95HK Pistol Magazine Spring This is a must-have spare part for all HK pistol owners. HK recommends that for optimum performance, you change out the magazine springs often and swap them regularly when keeping the pistol magazines loaded for long periods...HKP-01426$8.95 -
HKP HK MR556/416 Handguard Rail System Hex Screw
HKP HK Parts
$9.95HK416, MR556 Replacement Handguard Rail Screw - Hex- Stainless Steel Hex head replacement handguard retension screw for your HK416, MR556 forearm. Made in the USA from 17-4 SS with a 5mm hex head for ease and use when installing and taking off the...HKP-17657$9.95 -
H&K HK USP/45/P30/P2000 12LB Stock Hammer Spring
H&K Heckler & Koch
$8.9512LB Stock Hammer Spring This is the spring used in some custom trigger jobs, along with other trigger return and firing pin block springs. This spring can be used on the P30 along with the light trigger return spring and light firing pin block...HKP-01284$8.95