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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On Sale
HK91, G3 Firing Pin Spring - Used
H&K Heckler & Koch
Now: $4.45Was: $4.95H&K 91/G3 (7.62x51/.308) Firing Pin Spring - Used This is a common repair and replacement item. Grab one for a spare, just in case.HKP-16711Now: $4.45Was: $4.95 -
On Sale
HK G36, UMP Pistol Grip Storage Insert
USA
Now: $14.95Was: $16.95HK UMP, G36 Pistol Grip Storage Insert G36 & UMP pistol grip insert for all G36 & UMP lower housings. This is the piece that locks into place and fits in the bottom of the handle itself. This is a perfect storage location for paperwork, spare...HKP-20176Now: $14.95Was: $16.95 -
On Sale
HK USP, P30, VP9 Magazine Spring - 30 and 32 Round Mags
H&K Heckler & Koch
Now: $8.95Was: $9.95Heckler and Koch 30, 32 Round Magazine Spring for HK USP, HK P30, HK VP9 HK German manufacture new production HK USP 9mm 32 round magazine spring. A super rare and hard to find part for the USP 9mm extended 32 round magazines. This spring took years of...HKP-16407Now: $8.95Was: $9.95 -
On Sale
HK UMP, USC, G36, SL8 Sear
H&K Heckler & Koch
Now: $26.95Was: $29.95HK Complete Sear G36, UMP, USC & SL8 Genuine German Heckler & Koch part. Compatible With: HK UMP HK USC HK G36 HK SL8HKP-01850Now: $26.95Was: $29.95 -
On Sale
HK MP5 Magazine Release Lever Spring - .40 S&W, 10mm
H&K Heckler & Koch
Now: $8.95Was: $9.95HK Heckler and Koch Magazine Release Lever Spring for HK MP5 .40 S&W and 10mm The needed spring that fits in the mag release lever and the magwell for the MP5 40,10 series. Made in Germany and no longer offered or made. These units are the latest...HKP-18109Now: $8.95Was: $9.95 -
On Sale
HK USC Magazine Release
H&K Heckler & Koch
Now: $17.95Was: $19.95Heckler and Koch .45 ACP Carbine Magazine Release for HK USC This is a great replacement as they are prone to breakage and wear. Please Note: For those that have a HK USC with a bullet button and are moving to a free state and want to revert back to the...HKP-02196Now: $17.95Was: $19.95 -
On Sale
HK MP5, MP5K Paddle Mag Release Contact Piece
H&K Heckler & Koch
Now: $53.95Was: $59.95Heckler and Koch 9mm Contact Piece for Paddle Mag Release for HK MP5 and HK MP5K - German This is the real deal NOT the .308 or .223 contact piece. Hard to find factory-correct, brand-new, latest production German HK 9mm contact piece. Compatible...HKP-00118Now: $53.95Was: $59.95 -
On Sale
HK VP9, VP9SK, VP40 Firing Pin with Striker
H&K Heckler & Koch
Now: $53.95Was: $59.95H&K VP9/VP9SK, HK VP40 Firing Pin w/ Striker New HK German factory firing pin that fits all models of VP series pistols. Compatible With: HK VP9, VP9 Tactical, VP9L, VP9 OR HK VP9SK VP40, VP40 TacticalHKP-16833Now: $53.95Was: $59.95 -
On Sale
HK Mark 23 Firing Pin Spring
H&K Heckler & Koch
Now: $7.95Was: $8.95HK Mark 23 Firing Pin Spring Compatible With: HK Mark 23 SOCOMHKP-01627Now: $7.95Was: $8.95 -
On Sale
HK MP5, MP5K, HK93, HK91 Handguard Retainer Screw - Tactical, Keymod, and M-LOK
PTR
Now: $3.95Was: $4.95PTR Tactical, Keymod & M-LOK, Retainer Handguard Screw This is the screw that is used on all the Tactical, Keymod, and M-LOK forearms (MP5K, MP5, HK93, HK91). A great spare to have in case the original screw gets lost.HKP-16743Now: $3.95Was: $4.95 -
On Sale
HK416, MR556 Bolt Head Cam Pin
H&K Heckler & Koch
Now: $28.95Was: $31.95Heckler and Koch HK416 and HK MR556 Bolt Head Cam Pin New factory HK German manufactured cam pin for bolt group. A common wear and replacement item. Compatible With: HK 416, MR556 HK 416 A5 HK M27HKP-02539Now: $28.95Was: $31.95 -
On Sale
HK UMP, USC Extractor - .45 ACP
H&K Heckler & Koch
Now: $44.95Was: $49.95New USC & UMP .45 Extractor - German Compatible with both the USC & UMP. Perfect for spares as they are prone to breakage and are a common wear item. Please Note: HK considers this a high wear and replacement item. Once it is removed from the...HKP-00265Now: $44.95Was: $49.95