My standard M1A only gets fieldstripped every 500-1000 rounds. The standard after-shooting cleaning is to lock the bolt back, swab the bore till the patches come out clean, hit the bolt face and receiver rails with a toothbrush, and put a couple drops of LSA on the recoil spring. It takes all of 5 minutes. On patrol I don't swab till the patches come out clean, just run a wet patch, brush, and a few dry patches through. I don't mess with the gas system unless it doesn't move freely when the bolt is locked back and the rifle is tilted back and forth. About once a year I totally degrease the rifle, use a .45 brush inside the gas cylinder, scrape the carbon from inside the gas cylinder plug, and put a light coat or grease on the rear sight rack and pinion. No unit commander is inspecting my rifle before I go home, so why go overboard? LOL