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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HK UMP Lower Locking Pin
HKP HK Parts
$12.95HK UMP Lower Locking Pin, Push Pin For use with all HK UMP lowers & USC to UMP conversions. Made in the USA. This is the pin that holds the lower to the receiver. Compatible With: UMP USC Conversions TBT builds Omega Other builds that...HKP-18580$12.95 -
HK G3 Large Buffer Screw
H&K Heckler & Koch
$1.95HK G3 Large Buffer Screw This is the screw that screws in the back of the buffer. This is also needed to install the Magpul PRS2 stock. Used- in good, working condition.HKP-16981$1.95 -
HK MP5, HK33, HK53, HK93 Elbow Spring With Roller - Full Auto Trigger Pack - Used
H&K Heckler & Koch
$4.95H&K Full Auto Trigger Pack Elbow Spring With Roller - USED Used- Good shape. This item is a factory HK German replacement part.HKP-16241$4.95 -
Bolt Head Locking Roller - -4, 7.96mm - Under-sized
H&K Heckler & Koch
$27.99Heckler and Koch -4 7.96mm Undersized Roller for Bolt Heads The proper roller size is essential for proper head spacing and bolt gap. New HK German not surplus or used goods. German-made -4 roller, each roller is priced per roller. Compatible...HKP-00504$27.99 -
Out Of Stock
HK MP5SD Sealing Ring
H&K Heckler & Koch
$29.95Heckler and Koch Sealing Ring for HK MP5SD Each HK MP5SD sealing ring is the sealing gasket that seals the SD suppressor against the trunnion on factory HK MP5SD's or factory correct SD conversions. This is a typical wear item as they do degrade and...HKP-00142$29.95 -
HK416, MR556 Ejection Port Cover
H&K Heckler & Koch
$55.95H&K HK MR556/416 Ejection Port Cover HK manufactured newer polymer style cover assembly found on the latest HK 416 & MR556. This item can also be used on other AR15-style projects to enhance the project with the finest ejection port cover...HKP-15229$55.95 -
HK MP5, HK90 Series Trigger Spring - SEF and Navy - 3 Position - Surplus
H&K Heckler & Koch
$4.95HK 90 Series SEF & Navy Style Trigger Return Spring - Surplus For HK 90 series (semi or full-auto). This item will fit any NON-burst trigger pack. Compatible With: MP5, MP5K, SP89, & SP5K HK G3, HK91, PTR HK 93, 33, HK33K, & HK53 Other HK 90...HKP-01092$4.95 -
HK416, MR556, HK417, MR762 Buffer Retaining Pin
H&K Heckler & Koch
$15.95Heckler and Koch HK MR556, HK MR762, 416/417 Buffer Retaining Pin New HK German proprietary HK designed buffer pin unique to the HK 416 and MR 556 series. Compatible With: HK416, MR556 HK MR762 HK M27HKP-02544$15.95 -
HK SL8, G36 Magazine Release - Extended
H&K Heckler & Koch
$19.95Heckler and Koch Oversized Extended Magazine Release for HK SL8 and HK G36 New HK German HK SL8, HK G36, HK243 extended mag release. A must have upgrade for your HK SL8, SL8 to G36 conversion or G36 firearm. The HK extended magazine release is a...HKP-17720$19.95 -
On Sale
HK MP5, HK94, SP5K Magazine Floorplate - 9mm - US - BLEMISHED
USA
Now: $5.95Was: $9.95MP5 & MP5K 9mm Magazine Floor Plate - BLEMISHED VARYING CONDITION - SOLD INDIVIDUALLY COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART PRICE IS PER MAGAZINE Floorplate - SOLD...HKP-17507-BNow: $5.95Was: $9.95 -
HK MP5K, SP89, SP5K Recoil Rod Assembly - USA
DTAC Dakota Tactical
$34.95HKP MP5K, SP89, & SP5K Recoil Rod Assembly - USA The new US-made Dakota Tactical recoil rod assembly is completely micro-polished and built of the finest materials. This is a great item to have on hand as a spare part as this is a wear and...HKP-02169$34.95 -
HK P Series Cocking Piece LEM
H&K Heckler & Koch
$69.95HK P Series Cocking Piece LEM Compatible With: HK P30 HK P30L HK P30SK HK P2000 HK P2000SKHKP-01769$69.95