This is a Custom Smith and Wesson 645 in 45 acp. It is a real nice custom that has had front slide cocking serrations, Action job, recontoured trigger guard , extended slide release, recountoured hammer, upgraded decocking Lever. This gun is built like a tank and can handle +P loads all day. It will also feed any kind of 45acp ammo. Looking to trade for a nice AR 15 and may consider other firearms trades. Values are all over the place on these and still have not found one customized like this. Fair trade value $650