USC / UMP to ACR Stock Block
Available under exclusive sales rights at www.hkparts.net
HK USC / UMP M4 buffer tube stock block
Add a M4 style butt-stock onto your UMP-converted USC Rifle
Shown pictured without stock and with not-included Law Tactical
Folding Stock adapter. Made out of Kevlar reinforced ABS,
this nearly indestructible adapter is light and strong.
$99 shipped - available now.
HK USC and UMP wide magazine releases.
Two different variants, one for USC lower receivers and one for UMP.
Sold under exclusive sales agreement at www.hkparts.net