I have an AR pistol in 350 Legend and love it. 7.5 inch barrel with a brace. Accurate, recoil is fine, gets looked under the truck seat. Not a primarily carry weapon, but there if you need it and have time to retrieve it. The best option for a pistol caliber weapon I like is the MP5 clones and I have a PTR 9KT with a brace. Put in a backpack, 4 mags equals 120 rounds. 5.5 pounds with one mag.