Battle Arms .308 15" RIGIDRAIL M-LOK DPMS High Profile LR-308 BAD Development BATTLEARMS RIGID RAIL
The distance from the barrel’s centerline to the top of the receiver rail on a pre August 2009 DPMS LR308 model and Aero M5 is HIGH PROFILE 1.313'’. On a post August 2009 DPMS LR308 model the distance is 1.253'’ also known as LOW PROFILE. Just to make things MORE confusing, S&W MP10 created their uppers with a 3/16" Tang BUT a 1.253" centerline distance. Therefore S&W has a "high profile" tang measurement but don't be fooled, it does require LOW PROFILE handguard due to the barrel centerline distance.