I have never fired a glock 21. and have less than 100 rounds through my 45 m & P. i just got it a couple of months ago. but i like the idea of a couple more rounds and an extra mag?. pretty much a straight trade. one of the guys on here has a custom glock i like. but i may have a hard time parting with the smith any help in this is appreciated. maybe i should take the glock for a test drive at west coast? at least then i will know. but once you have shot a glock you know what to expect... BANG! right. but the same goes for this guy. but little round count. but mostly tested for hollow self defense carry.... you see the think is today i shot all of my pistols i wanted to try and shoot in competition and found out i shoot the best with my xd, glock and Smith. so getting rid of my sig and my desert eagle. love them but not enough to keep. wanting to try out a kimber or a 1911. so many to choose from. HELP.