03-09-2012, 10:28 PM
DI all the way especially on a long range gun. A long barreled precision gun is not a machine gun, therefore there is no need for a piston system in the first place. Also, as you mentioned, adding moving parts to your barrel could be detrimental to accuracy. It certainly doesn't help it. Piston systems have their place and that's on full auto carbines or PDWs.