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This is the parts kit you need for the full weld-on conversion, if you don't have your parts already. Includes: HK UMP lower w/ buffer, UMP butt stock, buttstock axle pin, UMP rear hinge section, locking/takedown pin.
This is the parts kit you need for the full weld-on conversion, if you don't have your parts already. Includes: HK UMP lower w/ buffer, UMP butt stock, buttstock axle pin, UMP rear hinge section, locking/takedown pin.