07-19-2016, 02:46 PM
SBR lowers?
I maybe wrong but the lower should be just a standard mil spec lower even if its upper is built to SBR length, dont think their is a special kind of lower to be used with a SBR upper.
I maybe wrong but the lower should be just a standard mil spec lower even if its upper is built to SBR length, dont think their is a special kind of lower to be used with a SBR upper.

