my 4.5 in 45acp ar. it was in my truck when the son in law borrowed it and he took it out at home to shoot it, stuck it in the house, went to work and his house burned to the ground. ive been 2 weeks restoring it and it should be done sunday. ill post an after picture when its done. i did some research about barrel temper and they said as long as it doesnt get over 1200 f. im sure if it got that hot the stock and grip would have been completely gone. as is i had to relace the bumper on the buffer, the brace, the red dot, stock quick dethatch (its on order) all the springs and pins. i had everything in the spare parts drawers except the quick detatch. many hours in the ultrasonic cleaner and elbow grease!! even the binary trigger worked after cleaning it up but i stuck it in my 9mm cmmg 16 ' gun and if this thing runs well ill buy another for it. its a cool little gun. retract and detatch the stock and it will fit in a lunch bucket. uses glock mags so i can throw it and my glock 30 in a small bag for a truck set up. if i get it running reliably again on a binary i just might have to buy a 45acp suppressor! Christmas has about drained me though so it will have to wait a bit