i bought a pri low profile adjustable gas block to fit under my 15" troy alpha rail. the pri would not fit. so i ordered the wilson combat low profile adjustable gas block. it fits great. i even flexed the 15" rail a little to see if it made contact and no contact. this seems like a hot setup for running an adjustable gas block and a long light rail for an spr build.
also the wilson came packaged nicely and came with a 12" allen wrench to adjust the gas way back under a rail.
also the wilson came packaged nicely and came with a 12" allen wrench to adjust the gas way back under a rail.