No do not grind that piece down, it keeps the cylinder from falling out. When you disassemble the gun and slide the part out that the cylinder is on, the cyliner will just slide off. Look up sp101 disassembly on youtube you will understand what I mean
Yeah I am pretty happy with the accuracy of mine. The DOA on mine took a little getting used to however.Some people complain about the weight but I find it to be a good CCW for me. Fun to shoot as well.