If you’re looking for a way to shorten the length of your AR Pistol, I’d take a long, hard look at the Maxim Defense CQB Brace, which also came with a JP Rifles Silent Capture Spring. I’m a big fan of that spring because it’s very reliable, easy to use and completely eliminates the “SPROING!” of the buffer spring recoil next to your ear.
I also did the review of the DoubleStar ARP-7 AR Pistol, and I loved the darn thing. Accurate little sucker too… I managed a few MOA and sub-MOA groups with it using SIG Sauer 77gr ammo.
And because there are very few articles on this topic, I wrote up five skill building pocket pistol drills you can shoot on an indoor range.
I’ve also found a lot of articles that showed you HOW to move on a USPSA stage, but darn few about WHY you wanted to do so, so I wrote a beginners guide to stage strategy for USPSA.