New to the forum and a fairly new handgun shooter using an M&P 9. Every 6 rounds or so I end up with a ftf. Not sure what is causing this. It wasn't an issue until recently. I did install the apex dcaek recently. I didn't notice a problem until after the install. Could I have messed up something? I know the most likely culprate is limp wresting, but I don't think that I am. I am using a thumbs forward grip. Is there a way to figure out if it's me or my M&P?