Discussion in ' The 1911 Forum ' started by Jackman,. 68c15 replied Apr 22, 2019 at 4:59 PM. They found that, with point shooting, the 1911 shot a little low for most people. They changed the mainspring housing from flat to arched, which made the gun point higher when you held it. The biggest VISIBLE difference is the notches behind the trigger guard. Everything else is replaceable. You can put a 1911 trigger on an A1, and vice-versa. Same with flat and arched mainspring housings, hammers and grip safeties. The Firearms Forum - The Buying, Selling or Trading Firearm Forum. We work hard to bring the best Firearms Forum has to offer! Unlock additional features, and fewer ads while browsing. I believe it was at the 1911A1 introduction the pistols went from a polished blue finish to the more familiar, more durable and cheaper parkerized finish. The finish change may predate the 1911A1; no doubt one of our more studied brethren will correct me. The 1911 rear sight had a very tiny 'U' shaped notch, and the front sight was narrower than the 1911A1 (not sure of actual dimensions, but fairly subtle). How do you carry a Taurus Raging Judge Magnum?. m77user replied Apr 22, 2019 at 4:44 PM. Good info. I just always figured it was an abbreviated term that didnt have any meaning as far as differances. nmckenzie replied Apr 22, 2019 at 4:55 PM. However, one does occasionally find a G. I. pistol with a 1911A1 frame and a 1911 slide with the original sights. These are presumed to be arsenal rebuilds. The 1911A1 (the 'A1' in military speak in those days meant 'alteration one') had a subtly wider front sight and was squared flat on top, rather than almost a point, and the rear sight notch was slightly wider and deeper and was square on the bottom. The Firearms Forum is on online community for all gun enthusiasts. Join us to discuss firearms of all kinds, gun accessories, legal issues and more. Membership is free and we welcome all types of shooters, whether you're a novice or a pro. Come for the info, stay and make some friends. drymag replied Apr 22, 2019 at 4:23 PM. Well, one of the few banned States in US, and for. The A1 was a series of modifications that the US Army submitted to Colt. Arched housing, the recessions around the trigger, the hammer spur and sights are slightly different, short trigger. MIkeflys replied Apr 22, 2019 at 5:03 PM. carver replied Apr 22, 2019 at 4:23 PM. The Firearms Forum - The Buying, Selling or Trading Firearm Forum. What are the differences between 1911 and 1911A1? anyone have some pics to add?. [ASKDEEIPSNPPET-21-23] The gun is missing a screw for the hammer, the recoil pad is dry rotting, and the finish has a patina look to it. I believe this is the s/n because the barrel has this number also. The Rifle barrel has the proof stamps: Crown over N, Crown over U, & Crown over G. On top of the barrel it is stamped in gold: K. Kormes, I think, hard to read. This, I believe is the caliber, and I don't know what this means. Please be sure to post images when you're asking what the value of your firearm(s) is. We find this to be a necessary tool when determining a value. It is stamped on the side of the barrel: fluss stahl krupp essen. >fluss stahl krupp essenThe (2) 16 ga barrels have the proof stamps: B over Crown, Crown over S, Crown over U, & Crown over N.The rifle barrel is also stamped: 7.8mm/57 This, I believe is the caliber, and I don't know what this means. Discussion in ' The Ask the Pros & What's It Worth? Forum ' started by catman,. The Firearms Forum - The Buying, Selling or Trading Firearm Forum. The (2) 16 ga barrels have the proof stamps: B over Crown, Crown over S, Crown over U, & Crown over N. On the flats were the gun breaks, it is stamped: 87. I am trying to find out when and where this gun was made and its value. The Ask the Pros & What's It Worth? Forum.