Things I liked:Does what it's designed to do. Things I would have changed:I would have used a pin with a small flat on one end with a set screw on the barrel lug. Tightening the set screw onto the flat of the pin would hold it in place and also enable a quicker, easier barrel change.
Things I liked:Fairly accurate in my R1. Things I would have changed:I think it might be more accurate if shape like the Silver Arrow. What others should know:Not quite as accurate as standard lead pellet.