this is 1911 #6 and colt 1911 #4 well i just got this colt lightweight commander yesterday. one more ccw to add to my rotation. it came with ambi extended safeties. i detest ambi safeties and making them extended is even worse. first thing i did was slap in a standard safety and have a colt brushed stainless on order. ive never understood the desire for ambi especially on a carry gun where it can get swiped off so easy. the extended just bites into my hand on shooting them. so it had to go. one thing about modern current production colts is they feed EVERYTHING including empty cases. load up a mag with empty 45acp cases and it will hand cycle them all. hopefully will find time to try it out this weekend.