Review on 📱 Action Mount Sportsman's Mount: Securely Attach Any Smartphone to Your Sports Equipment - Fishing Rods, Bows, Rifles, and More! by Anil Jaimes

Seems to be good quality but will NOT fit my 12 gauge Remington 870 barrel. Not even close! This mount will not fit a 20 gauge shotgun barrel. There were no model or size options when ordering. It is advertised as one size. I haven't tried installing it on any of my long barrels. I think they would fit. However, I don't think it would fit in my Colt LE901 (.308) barrel. Depending on the brand of AR15 barrel, it may not be suitable for these barrel types. Too bad I didn't take any photos of it. Almost forgot to return it in time.