I have been messing in target rifles for years. I have recently taken a strong interest in subsonic ammo. The M1A has it all covered. It comes standard with a gas block with a valve to turn off the gas feed if you want, and the action has a handle on the side that can work manual alot like a bolt action if needed. In this manner, it seems to be even quieter than my bolt action subsonics. Only thing I can hear from the action is the firing pin click. Amazing versatility from a Semi-Auto. Also mine came standard with a Aftermarket world leading premium target barrel. There are just some things that are taken for granted until you shoot it next to a factory mass production barrel... I shoot with my friends who are name brand bolt actions and win on occasion. They are amazed how a semi-auto can have such accuracy. The match grade features make a difference! Out of all of my rifles, My M1A will be the one IN my cold dead hands when they come to pry!