Not exactly sure...
When it was built, I bought it used from a local shop, and for a long time thought it was one of the Kahr guns, because the manual that came with it said Kahr Arms.
However, after careful scrutiny one day, I noticed that the gun doesn't say kahr on it any where. It is an Auto Ordnance gun.
I bought it before 2004, but don't recall exactly when, a couple of years, I think. After the passing of the AWB, I got the 50rnd drum (for an outrageous IMHO price). have only used the drum 3 times, and so far, it hasn't worked well. Stick mags work flawlessly.
My gun feeds FMJ, JHP, LRN, and LSWC, everything I have put in it so far. And it is accurate! One hole 5 shot rip at 25yds, and with the ladder sight, I can ring the 200yd gong! Even with the long, spongey heavy tgrigger pull.
Sadly, from what I have heard from other 1927A owners, this isn't always the case.
Have had only one bit of trouble with mine, the extractor broke on 3rd stick I shot. Got a replacement (actually got two), and haven't had any further problems.
I'd prefer the classic 11.5" barrel, but don't want to hassle with SBR registration, so I just consider mine the "express" version, longer barrel, more thwop!