I got a Glock 21 with a Alpha Lone Wolf conversion barrel in a trade. It is chambered in 10mm and 40S&w. I do not have the original 45. barrel. It is as is. Its a Glock 21 SF lower and a 21 matching slide. I originally posted it as a 20 lower and a 21 upper. But both the slide and the lower have matching serials. So all the serials match except the barrel. It has titanium take down pins, timney trigger, and titanium firing pin. The barrel is threaded for suppressor. I have 500 in it. Hit me up on my cell at 512-800-twofive94