LMOS is JP Rifles system for reducing the recoil impulse.

http://www.jprifles.com/1.4.7_bc.php

In addition to the improved bolt and rifle length reciever extension and buffer, I also have the adjustable gas system. I turned it all the way off and then started adding gas until it would cycle the action, then added just a bit more gas to keep it running dirty. Not really a life-or-death set-up, but nice for this purpose. Might just throw an A1 stock and the TA11 for the next match.