First, let me say my concerns will likely be moot once the cover is broken in, plus I’m new to using these. However, starting off it partially obstructs my sight picture through my scope, a Leupold Mk 5HD 5-25×56 on a 20 MOA rail. Can is a Nomad-L on the end of a 24″ long barrel, so that might have something to do with that. Also, it was sliding off my suppressor with every shot, requiring adjustment. Outside of that, it works as advertised.