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
HK45, HK45 Compact, USP, USP Compact LEM Cocking Piece Elbow Hammer Rebound Spring
H&K Heckler & Koch
Now: $8.96Was: $9.95HK 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 HK45CNow: $8.96Was: $9.95 -
On Sale
HK VP9, VP9SK, VP40 Safety Clamp
H&K Heckler & Koch
Now: $8.96Was: $9.95H&K HK VP9/VP9SK, VP40 Safety Clamp - Black Genuine H&K safety clamp. Compatible With: HK VP9 HK VP9SK HK VP40 HK VP9A1 F HK VP9A1 KNow: $8.96Was: $9.95 -
On Sale
HK MP5 Hammer Axle
MKE
Now: $1.78Was: $2.99MKE HK MP5 Hammer Axle MKE Hammer axle for the 90 series style of trigger packs. Each axle pin or pivot pin measures .237 inches (6.0mm). A great spare and must have spare part for anyone that owns an HK 90 series of firearm or trigger packs. Compatible...Now: $1.78Was: $2.99 -
Out Of StockOn Sale
HK VP9, VP9SK, HK VP40 Disassembly Safety
H&K Heckler & Koch
Now: $12.55Was: $13.95Dismounting Or Disassembly Safety HK VP9, VP40 Compatible With: HK VP9 HK VP9A1 F HK VP9A1 K HK VP9SK HK VP40Now: $12.55Was: $13.95 -
On Sale
HK416, HK417, MR556, MR762 Detent Takedown Pin
H&K Heckler & Koch
Now: $8.96Was: $9.95H&K HK MR556/MR762/416/417 Detent Takedown Pin Factory H&K takedown pin for MR556 A4. Compatible With: HK MR556 HK 416 HK MR762 HK 417Now: $8.96Was: $9.95 -
On Sale
HK45, HK45 Compact USP Detent Compression Spring
H&K Heckler & Koch
Now: $5.36Was: $5.95HK 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...Now: $5.36Was: $5.95 -
HK P7 Series Detent Spring - Piston Plunger
H&K Heckler & Koch
$7.95HK P7 Series Piston Plunger, Detent Spring Compatible With: PSP P7M8 P7M10 P7M13$7.95 -
On Sale
HK416, MR556, MR762 Bolt Catch Pin
H&K Heckler & Koch
Now: $4.46Was: $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 MR762Now: $4.46Was: $4.95 -
On Sale
HK90 Series Compression Spring for Shifter Rod on Burst Trigger Packs
H&K Heckler & Koch
Now: $9.86Was: $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...Now: $9.86Was: $10.95 -
On Sale
HK German Hammer Spring (5.56/.223 & 7.62x51/.308) - Used
H&K Heckler & Koch
Now: $4.46Was: $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...Now: $4.46Was: $4.95 -
On Sale
HK416 A1, MR556 Barrel Nut
H&K Heckler & Koch
Now: $48.56Was: $53.95Heckler and Koch Barrel nut for MR556A1 rifle All steel barrel nut. This item is a must-have repair and replacement part for removal or when you have any work done to your barrel, as the barrel nut may become damaged in the removal and...Now: $48.56Was: $53.95 -
On Sale
HK USP Magazine Floorplate - .45 ACP - 10 Round - Extended
H&K Heckler & Koch
Now: $11.65Was: $12.95H&K 10 Round HK USP .45 ACP Extended Floor Plate This is a great part to stock up on as the 10-round tabs are known for breakage, or if you have large hands, the extended floorplate is a must-have upgrade. Compatible With: HK USP .45 Magazine...Now: $11.65Was: $12.95