TexasCHLforum.com

Your Rock Island compact should fit any holster designed for a 1911 Officer, Colt Defender, Kimber Ultra Carry, etc. Likewise, the magazines will also interchange, as well as most of the parts.

One if the most important parts of a "fit and try" is not only gun-to-holster fit, but also holster-to-user fit. A holster that fits your gun is near-useless if the holster doesn't fit you (and thus, doesn't conceal or "chafes uncomfortably"). We all wind up with a "box o' holsters" that have been tried, and cast aside (and indeed, my own box of holsters is growing, though I am but a newbie to CCW).