I'm getting more interested in CMP type shooting events and would one day like to add an AR to my collection for this purpose. I would like to build a A4 style rifle that is MA legal. Assuming I bought a fixed mag lower that seem to be out there these days, what should I be looking for in an upper that keeps it MA legal.
What I am thinking:
GI solid body stock
20" GI profile barrel with front sight on gas block, (CMP legal twist rate?)
Detachable carry handle rear sight.
a4 style front hand guard
Am i correct that a bayonet lug and some types of flash hiders would make the rifle not MA legal? I would prefer to have something on the end of the barrel, but it's not critical. Does having a fixed mag make it not an assault weapon, or are bayonet lugs and threaded barrels still off the menu?
Would it be as simple as buying a MA legal fixed mag lower and buying a compliant upper and slapping them together? Or am I missing something?
What I am thinking:
GI solid body stock
20" GI profile barrel with front sight on gas block, (CMP legal twist rate?)
Detachable carry handle rear sight.
a4 style front hand guard
Am i correct that a bayonet lug and some types of flash hiders would make the rifle not MA legal? I would prefer to have something on the end of the barrel, but it's not critical. Does having a fixed mag make it not an assault weapon, or are bayonet lugs and threaded barrels still off the menu?
Would it be as simple as buying a MA legal fixed mag lower and buying a compliant upper and slapping them together? Or am I missing something?