[Jute Scarecrow]

Just a thought, I was reading somewhere about Airsoft G.I. doing an upgrade on a rifle where they used a "rubberized paint" which aided in the handling/grip of a rifle. Would rubberized paint not help deaden at least some of the internal noise? Also I am assuming you are using this in a sniper role, if so, can you thicken your rifle's ghillie "sock" or wrap? It's just me but I'd be worried about putting something expandable inside the rifle, then again, I am new to the sport.

 

[Jute Scarecrow]

If you Google "plasti dip rifle stock" or simply go to http://www.plastidip.com/home_solutions/Plasti_Dip you should see the product. They now actually have specific camouflage colors as well. I honestly think that between a coat of this (which can be removed should you want to sell the rifle) and the ghillie sock and wrap on the exterior of your rifle should provide serious sound deadening. A Google search will return photos and videos of rubberized stocks in addition to articles. Best of luck!