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
HK USP Full Size Trijicon RMR-SRO, Holosun 407C-507C Mount
Evolution Gun Works
Now: $44.96Was: $49.95Evolution Gun Works HK USP Full Size Trijicon RMR-SRO, Holosun 407C-507C Mount Includes: Mounting hardware Features: Material: 7075 aluminum Coating: matte black hardcoat Overall length: 1.780" Overall width: 1.1" Mounting hardware: (2) 6-32...Now: $44.96Was: $49.95 -
On Sale
HK90, MP5K Sear Catch - Steel - Used Surplus
H&K Heckler & Koch
Now: $11.65Was: $12.95Heckler & Koch's Sear Catch Release - Complete for HKP 90, MP5K Trigger Packs - German - Used - Steel German HK Sear/Catch complete with installed detent, spring and roll pin. Used surplus in VG-EXC shape and in perfect working order and complete...Now: $11.65Was: $12.95 -
On Sale
HK416, MR556, G36, SL8 Piston Ring - Replacement Set of 3
H&K Heckler & Koch
Now: $17.95Was: $19.95HKP Gas Piston Ring Replacement Combo Set- 3 Rings The gas rings are prone to periodic breakage and wear and tear and require them to be replaced periodically. These are some of the most common breakage parts we see that need to be replaced on these...Now: $17.95Was: $19.95 -
On Sale
HK45, VP9 Series Extractor Spring
H&K Heckler & Koch
Now: $5.36Was: $5.95HK 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 VP9A1 F HK...Now: $5.36Was: $5.95 -
On Sale
HK Handguard Sling Pin - Ambi - Small
H&K Heckler & Koch
Now: $55.76Was: $61.95HK German Ambidextrous Small Sling Pin For Forearm This ambidextrous pin will allow the user to attach a sling hook to the sling pin. This will also allow the user to use the sling on either the left or right side.Now: $55.76Was: $61.95 -
Out Of StockOn Sale
HK MP5, MP5K 9mm Anti-Rattle Roller Tipped Paddle Magazine Release
HKP HK Parts
Now: $23.58Was: $29.47HK MP5, MP5K 9mm Anti-Rattle Roller Tipped Paddle Magazine Release Latest generation paddle mag release for all 9mm MP5, MP5K style builds. Made to the latest German specs, materials, and design. Compatible With: MP5, 94 MP5K, SP89, SP5K Other...Now: $23.58Was: $29.47 -
On Sale
HK45, HK45C, USP Detent Plate Variant 3 & 4
H&K Heckler & Koch
Now: $26.99Was: $29.99Detent Plate For V3 & V4 Installing the V3/4 detent plate will configure the selector lever to de-cock only, thereby disabling the safety function. The V3/4 is a popular configuration to LE/MIL agencies around the globe as well as many concealed...Now: $26.99Was: $29.99 -
On Sale
HK416, MR556, G36 Gas Piston - Complete
H&K Heckler & Koch
Now: $45.86Was: $50.95H&K HK 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...Now: $45.86Was: $50.95 -
On Sale
HK21 Cocking Handle - Extended Style
HKP HK Parts
Now: $55.96Was: $69.95HK Extended Cocking Handle - HK21 Rubberized extended cocking handles for the older style HK21 firearms. This extended cocking handle makes a HUGE difference when trying to charge the HK21 firearm, as it has increased spring pressure and can be a pain to...Now: $55.96Was: $69.95 -
On Sale
M-LOK Rail Section - 5 Slot
Magpul
Now: $17.05Was: $18.95Magpul M-LOK 5 Slot 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...Now: $17.05Was: $18.95 -
On Sale
HK416, MR556, G36, SL8 Piston Ring - Replacement Set of 3 - USA
HKP HK Parts
Now: $7.16Was: $8.95HK MR556, HK416 & G36, SL8 Gas Piston Ring Replacement Combo Set - 3 Rings This is a high wear common repair & replacement item. The gas rings are prone to periodic breakage & wear, tear and require them to be replaced periodically...Now: $7.16Was: $8.95 -
On Sale
HK VP9, VP9SK, VP40 Clamping Sleeve For Drop Safety Axle
H&K Heckler & Koch
Now: $6.25Was: $6.95Clamping Sleeve For Drop Safety Axle VP9, VP9SK & VP40 This is the roll pin that goes in the side of the slide and retains the drop safety.Now: $6.25Was: $6.95