I have a 45acp AMT backup.
At one time I carried it as one of my CCW pieces.
The line of pistols is still being made as noted above.
As noted earlier the pistol has a very long and heavy trigger pull.
It holds 5 rds +1 in the chamber.
It is not condusive to quick mag changes due to the catch at the base of the grip which engages the base of the mag.
If you have a good mag, the gun is reliable.
As a 45, it is a thumper. You will not want to stand at the range and pour 50-100 rds through it. You can, but it beats on you, as a small pistol with a big bullet might.
It is a close quarter defensive pistol, probably suited for its name "backup". I carried mine not as a back up, but when the occasion for the 1911 was just to big to carry.
At about 22 oz (empty) it is not an overly light gun.
However it is not too heavy either. It is slender, and you can put it in a IWB holster, and you hardly know its there. It is stainless so I don't worry about sweat.
Accuracy is a ? I have paced off 15 yds and put three shots in a 50 cent piece. However, I can spend the rest of the night trying to put three of them on a pie plate. Rarely succeeding. Its the recoil and the trigger pull, that are not condusive to precise accuracy. It has no external sights, but instead has a "U" grove. For 7 yds and in, it is just fine. Don't go to Camp Perry with it though.
Dealer cost is somewhere around $210.. I think.
I am an AMT fan, mostly because of my experience with their Hardballer 1911. Great Value & Quality for an American Stainless 1911 clone.
The backup design has been around for many years, and honestly the advantages it once had, small compact and concealable as a backup, have been overtaken by competition and technology.
Its ok for what it is.
Would I buy another one? Probably not. I would buy a pocket 32 Keltec, Berretta, etc. for real backup concealability, and use a Glock model 30 for routine concealed carry. I have neither currently.
It pains me to say that because I am a 1911 fan and actually carry a Paraordnance P-12.
My 45 ACP backup gets pulled into service only on rare occasion.
If you were in Metro Detroit, I would let you try mine out.
Good luck.