HK MP5/K & SP5/K Small Parts
Find every small part you need for your HK MP5 build or repair. Our selection includes pins, springs, detents, and other essential components from HK and trusted aftermarket suppliers.
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H&K MP5/SP5/MP5K/SP5K 9mm Extractor Spring
H&K Heckler & Koch
$9.95H&K MP5/SP5/MP5K/SP5K 9mm Extractor Spring This extractor spring will fit all of the 9mm HK variants including clones. This part is German HK factory manufactured and made to the tightest of specifications and tolerances and will provide a much...HKP-00055$9.95 -
FMP MP5, MP5K Extractor Spring
FMP
$4.95New old stock HK contract FMP extractor spring will fit all of the 9mm HK variants including clones. This part was made using HK prints on HK contract tooling that the German HK factory manufactured for the Portuguese Military and police forces. This...HKP-18201$4.95 -
H&K Small Push Pin - Forearm & Lower
H&K Heckler & Koch
$7.95H&K Small Push Pin - Forearm & Lower All steel HK German small push pin for use on the lower grip housing. The small push pin is also the correct pin for holding the HK forearm in place. Compatible With: HK91, G3, PTR HK93, 33, 53 HK MP5, 94,...HKP-00075$7.95 -
H&K Rifle Extractor Spring For All HK's
H&K Heckler & Koch
$6.74HK German 308, 7.62 & 556, .223 Rifle Extractor Spring New factory HK German part. The extractor spring is the #1 most common repair and replacement item on HK firearms. Many HK gunsmiths recommend using this extractor spring on all HK 90 Series HK's...HKP-00188$6.74 -
HKP MP5 Replacement Buffer for Folding Stock or End Cap
HKP HK Parts
$3.49HKP MP5 Replacement Buffer for Folding Stock or End Cap Spare Replacement Buffer For Choate Folding Stocks Or End caps. Compatible With: Choate MP5 and MP5K stocks or end capsHKP-18735$3.49 -
H&K Ejector Lever Spring
H&K Heckler & Koch
$6.95H&K Ejector Lever Spring The new HK German factory ejector lever spring fits all HK 90 series of rifles and pistols. This is a common repair and replacement part and it is a recommended spare part for every HK enthusiast or shooter. Compatible...HKP-00059$6.95 -
Out Of Stock
Small Push Pin - Forearm & Lower
USA
$5.95HK Small push pin - US MAde All Steel US Made small push pin for use on the lower grip housing for a push pin style of lower housing. Black Nitride finish which adds extra durability to the pin plus corrosion and abrasion resistance.The small push pin is...HKP-20397$5.95 -
H&K 90 Series Pinned hammer
H&K Heckler & Koch
$29.95Hammer, Full Auto HK 90 Series Trigger Packs - German HK - UsedGerman HK Hammer Used surplus in VG-EXC shape and in perfect working order. With the proper hole on the hammer to pin the strut in place. This hammer is the hammer that is most commonly used...HKP-18305$29.95 -
H&K Barrel Retaining Pin - 5mm Standard Size
H&K Heckler & Koch
$9.95H&K Barrel Retaining Pin - 5mm Standard Size Each barrel pin is used for installing a new or replacement barrel. HK suggest using a new factory barrel pin when installing or reinstalling a HK barrel. We also offer the HK oversized barrel pins for...HKP-00071$9.95 -
HK German Butt Stock Push Pin
$8.95HK German Butt Stock Push Pin Each large stock push pin is used to retain the stock to the receiver on the 90 series of firearms. These are great replacement or spare parts to keep on hand as they fit all of the 90-series firearms below. The large...HKP-00076$8.95 -
H&K 30 Round MP5 Magazine Spring
H&K Heckler & Koch
$6.95HK MP5 30 Round Magazine Spring - German The MP5 30-round spring is a must-have replacement spring for all HK MP5 curved magazines. HK factory springs have been known to help cure worn, weak, or aftermarket magazine springs that do not feed well and...HKP-00089$6.95 -
H&K 90 Series Butt Stock Push Pin
H&K Heckler & Koch
$3.95Each large stock push pin is used to retain the stock to the receiver on the 90 series of firearms. Large push pins are for the stock and the small push pin is for the forearm and lower. The HK German genuine push pins are take off's from demilled G3...HKP-18038$3.95 -
H&K MP5, MP5K & SP5K 9mm Extractor
H&K Heckler & Koch
$59.95New HK German HK 9mm Extractor - Latest Generation This is the latest & greatest HK MP5 (newest F style version) German extractor. Each unit works with all HK MP5, HK94, MP5K, SP89, SP5K, or other 9mm clones. A great part to have as a spare or to...HKP-00057$59.95 -
H&K MP5, MP5K 9mm Hammer Spring
H&K Heckler & Koch
$6.89H&K MP5, MP5K 9mm Hammer Spring Each factory HK hammer spring will work in all 9mm & 40/10 trigger packs. This is the finest HK-made spring at the best price anywhere. Do not settle for an HK contract when you can have HK German for less. Great...HKP-00064$6.89 -
HK, Walther, Colt, .22LR 1/2 X 28 Barrel Adapter
USA
$29.95HK, Walther, Umarex 416, Colt M4 or MP5-A5 .22 Barrel Adapter With Thread Protector - M8 X.75 to 1/2 X 28 The finest thread adapter available that converts the factory thread pitch to 1/2 X28. Each adapter comes with a new O-ring (red) & built-in...HKP-01845$29.95 -
HK MP5 .22 Match Trigger Upgrade Spring Kit
HKP HK Parts
$17.49H&K MP5 .22 Match Trigger Spring Kit - Set of 3 Enhanced SpringsThe HK Parts Match drop-in spring upgrade set will enhance your MP5-22's trigger pull to an even smooth, crisp, and lighter pull that will promote better control, which in turn promotes...HKP-17335$17.49 -
H&K German Roller Retainer Plate For Rollers
H&K Heckler & Koch
$2.74Used HK German Roller Retainer Plate For All Rollers. This item is a common wear item that is great to have on hand as they are one of the top items that break or fail with use and age of the service weapon. Made in Germany. Fits all original 1st gen...HKP-02690$2.74 -
HKP 25 Round HK MP5 .22 Magazine Spring
HKP HK Parts
$3.95HK MP5 .22 25 round magazine spring for the MP5-A5 & MP5-SD .22Â A good supply of spare mag springs is a must. These are ideal to have on hand as the spring can become damaged or worn out. New fresh production mag spring for your HK MP5 .22 magazine...HKP-02786$3.95 -
DTAC Mag Paddle Bushing With Pin For Semi Builds
DTAC Dakota Tactical
$9.89Semi Auto Bushing Set For Paddle Mag Release InstallationThe finest semi-auto bushing set available anywhere and at the best price! Each kit will fit all HK paddle mag release installs. Made 100% in the US from 17-4 stainless steel. Latest production...HKP-02194$9.89 -
FMP Rifle Extractor Spring For All HK's - HK Contract FMP
FMP
$3.49HK Contract FMP (Portuguese) 308, 7.62, 556, .223 Rifle Extractor Spring This new factory HK contract part is the #1 most common repair and replacement item. This is also a great upgrade for those that want to upgrade the MP5/94 copper extractor spring...HKP-16248$3.49 -
Semi Auto Shelf For Receiver - Billeted
$19.95Semi Auto Shelf For Receiver - Billeted HK Semi Auto Shelf milled from one solid billet to HK's factory specifications (no castings here). This is the needed receiver shelf that is welded to the receiver to allow the use of the clipped & pinned...HKP-01521$19.95 -
Out Of Stock
HKP 90 Series Flat Trigger - Enhanced
HKP HK Parts
$49.95Made in the USA from solid billet machined ordnance grade steel, heat treated, finished in a QPQ Nitride finish. With the utmost attention to detail in the design and manufacture of the HK Parts flat 90 series trigger. Each enhanced flat trigger will...HKP-18364$49.95 -
PTR Semi Auto Spacer With Elbow Spring - Match Grade
PTR
$11.95PTR Semi Auto Spacer With Elbow Spring - Match Grade For use on all HK semi-auto trigger packs. It's a must-have for those converting a full auto trigger pack to semi-auto. This unit provides a "match" grade feel to your trigger pull.HKP-00838$11.95 -
Retractable Stock Buffer - MP5 A3 - USA
$7.74MP5 A3 Retractable Stock "H" Buffer For All HK A3 Retractable StocksThe A3 stock buffer is a high wear and common replacement items that does need to be replaced when they become torn, cracked, brittle, discolored & worn. These units are made from...HKP-14012$7.74 -
H&K Locking Roller Pin For Bolt Heads
H&K Heckler & Koch
$6.95H&K Locking Roller Pin For Bolt Heads HK roller retainer pin or clamping sleeve (holds roller retainer plate in place). Each retainer pin works with all roller retainer plates & springs. All 3 types including oval-shaped roller retainer...HKP-00066$6.95 -
H&K Roller For Bolt Head 8.00mm - Standard
H&K Heckler & Koch
$12.95H&K Roller For Bolt Head 8.00mm - Standard The 8mm roller is the proper roller size for the standard "zero" function. The correct 8mm roller is essential for proper head spacing and bolt gap. New HK German, not surplus or used goods, that are worn...HKP-00506$12.95 -
HKP MP5 & HK94 Firing Pin Spring - Enhanced
HKP HK Parts
$4.95HK MP5, MP5K Enhanced firing pin fits all of the MP5 9mm & 40/10 Variants including MP5,94 & MP5K, SP89 clones. The "Enhanced" firing pin spring was analyzed & engineered from scratch with the latest in performance spring technology and an...HKP-02321$4.95 -
MI MP5 M-LOK Forearm
MI Midwest Industries
$124.95MI MP5 M-LOK Forearm Compatible professional grade one piece design Simple installation, include all tools Mil-spec top rail. Features 15 full and 5 half M-LOK slots. Features two anti-rotation QD sling swivel sockets. Constructed of 6061 aluminum, hard...HKP-18472$124.95 -
H&K Oversized Barrel Retaining Pin - 5.25mm
H&K Heckler & Koch
$9.95HK Factory German Oversized Barrel Retaining Pin. 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...HKP-16954$9.95 -
H&K Cocking Tube End Cap-Aluminum
$12.95H&K Cocking Tube End Cap-Aluminum New US Made Cocking Tube End Cap (Dust Caps). Made from aircraft grade aluminum alloy, much lighter to save on weight. Built To Last!HKP-02806$12.95 -
HKP Roller +8 - New - 8.08mm
HKP HK Parts
$8.99Roller +8 - New - 8.08mmHK Parts Standard (8.08 mm) locking roller, The proper roller size is essential for proper bolt gap. US Manufacture.Price is per roller.**You need to order two for a complete set (pair) for bolt head.**HKP-19437$8.99 -
H&K +2 Roller For Bolt Head 8.02mm - Over-sized
H&K Heckler & Koch
$24.95H&K +2 Roller For Bolt Head 8.02mm - Over-sized New HK standard (8.02 mm) locking roller. The proper roller size is essential for a proper bolt gap. New HK German, not surplus or used out-of-spec part. Please note: The price listed is per roller...HKP-00507$24.95 -
H&K Magazine Catch Spring
H&K Heckler & Koch
$4.95Compression Spring For Magazine Catch For All: HK 91,G3 & PTR-91 HK SP89, MP5K & SP5K HK MP5/94 HK 93/33/53 HK All 90 Series RiflesThis spring is the spring that resides on the magazine catch.New HK German manufacture not used worn out surplus...HKP-01917$4.95 -
Out Of Stock
HKP Paddle Style Extended Mag Release - EMR
HKP HK Parts
$44.95A great addition to any paddle style mag release, such as those found on an HK. The extended mag release is machined from a solid billet of aircraft grade aluminum and hard anodized aluminum for a lightweight & robust addition to any HK paddle mag...HKP-17079$44.95 -
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 Roller +6 - New - 8.06mm
HKP HK Parts
$8.99Roller +6 - New - 8.06mmHK Parts Standard (8.06 mm) locking roller, The proper roller size is essential for proper bolt gap. US Manufacture.Price is per roller.**You need to order two for a complete set (pair) for bolt head.**HKP-19439$8.99 -
HKP Binary Selector Lever Set Screw
HKP HK Parts
$1.98This 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 keep your Binary trigger group going...HKP-20686$1.98 -
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 -
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 -
HKP MP5 & MP5K 9mm Contact Piece For Paddle Mag Release
HKP HK Parts
$15.95HK MP5, MP5K 9mm Contact Piece - USAFactory correct US manufactured MP5, MP5K 9mm Contact Piece For Paddle Magazine Release. Each part was made using the same material and manufacturing methods used on the German HK latest production parts. Hard to find...HKP-17403$15.95