I bought a NEW Rock Island Armory 1911A1 around 8 years ago. Very nice looking weapon, fit & finish are outstanding. As a complete unit, it runs like a Swiss Watch & is fairly accurate.
Two problems: #1 - It was the cheapest 1911A1 out there at the time and I bought it for the frame, wanted to put a Kimber .22LR conversion on it. I could not do this as the slide stop holes were out of specs, approx .005" too low and put a bind on the conversion unit locking it up. The holes in the RI slide are also out of specs so this does not effect the operation of the weapon in .45ACP.
Problem #2 - As recieved from the factory, the RI would not fire a rd, It would not even put a dent in the .45ACP primers. Upon inspection I found what looked like a "screen door spring" being used for a firing pin spring. Also, the orig. factory firing pin looks to be a well used one, (top set in pic). I replaced both parts and it runs fine now.
I bought a SA 1911A1 and the Kimber conversion unit fits great, looking back, I should have spent the extra $40.00, (at the time) and bought the SA in the first place, but I only wanted the frame!
I could have hogged out the hole in the Kimber unit to make it fit on the RI, but I hated to modify it. This was a while back, hopefully RI has taken care of their spec problems by now. This is the ONLY RI I own, Ken