HKP HK Parts
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Out Of Stock
HK UMP, USC Lower Bolt Catch
HKP HK Parts
$22.95HK UMP & USC Bolt Catch For Last Round Hold Open New HK USA lower bolt catch. Compatible With: HK UMP HK USC$22.95 -
HK UMP, USC M-LOK Attachment Piece
HKP HK Parts
$29.95HKP HK UMP/USC M-LOK Attachment Piece Upgrade your UMP and USC with the HK Parts M-Lok attachment piece, designed to eliminate the hassle of snagging and shredding your knuckles on Picatinny rails...$29.95 -
HK UMP, USC Picatinny Rail Set - 4 Piece
HKP HK Parts
$149.95HK UMP, USC Rail Set Complete A complete set of rails for your HK UMP/USC featuring an extended top rail for mounting your optic of choice. The rails are scratch resistant, class 3 mil-spec hard coat...$149.95 -
HK UMP, USC Sling Pin, Stock Block B
HKP HK Parts
$49.95HKP HK UMP/USC (.40 S&W/.45 ACP/9mm) Stock Block B Sling Pin The original thumb screw version for all stock block B's.$49.95 -
HK UMP, USC Sling Pin, Stock Block B - QD
HKP HK Parts
$74.95Quick Detach Sling Pin for Stock Block B - USC, UMP This Ambidextrous QD Sling Pin allows you to replace your Push Pin Style or Eyelet Sling Loop - Style Pin in your Stock Block B for use of a...$74.95 -
HK UMP, USC Top Rail - Extended - Optics
HKP HK Parts
$59.95HKP HK UMP & HK USC Extended Top Rail For Optics Nearly an 1" longer than the standard length top rail for mounting any Picatinny mount optic. Made in the USA from 6061 aluminum and hard...$59.95 -
HK UMP, USC, G36 Flat Trigger
HKP HK Parts
$99.95HKP HK UMP/USC & G36 Flat Trigger Our flat trigger has spaced out serrations at the face of the trigger for a superior grip. Chamfered edges prevent the trigger face serrations from cutting into...$99.95 -
HK UMP, USC, G36 Handstop - Complete
HKP HK Parts
$49.95Hand Stop Complete - USA - UMP, USC & G36 Compatible With: USC UMP G36K G36C$49.95 -
Out Of Stock
HK UMP, USC, G36, SL8 Sear - 9mm / .40 S&W / .45 ACP - 5.56 / .223
HKP HK Parts
$49.95Sear For The HK UMP, USC, G36, & SL8 - USA CNC machined from aircraft grade aluminum that is hard coat anodized that will last much longer than the factory HK part that's made with plastic. This...$49.95 -
HK Universal Magazine Spring - Extended
HKP HK Parts
$11.95Universal Extended Magazine Spring For HK Parts Extensions. This universal extended magazine spring fits most of our extensions from the VP9 to the Mark 23 extension kits. These are also the correct...$11.95 -
Out Of Stock
HK USC Carbine Mag Release - Extended - .45 ACP
HKP HK Parts
$24.95HK USC Alloy Mag Release - Extended Billeted alloy USC magazine release. This is a very common repair & replacement part as they are fairly easy to break on the USC lower. With this new metal mag...$24.95 -
On Sale
HK USC Stock Block to Picatinny Rail
HKP HK Parts
Now: $119.96Was: $149.95HKP HK USC Stock Block to Picatinny Rail The HKP USC stock block with picatinny rail offers superior adjustability for the stock of your choice. Each stock block is crafted from billet aluminum,...Now: $119.96Was: $149.95