does anyone make an adapter to use a screw on  flash supressor   oooo I don't want to change the barrel it shoots tooo good the way it is and if the adition changed it it could be removed  but if you thread it and it changes you are stuck with what you have  
thanks for any help

Accuracy hinges on the crown more than muzzle attachments. Some flahs hiders and muzzle brakes actually improve accuracy, and if you saw a degradation of accuracy, you could get a thread protector for the barrel.

To answer your question though, check on sturmgewher by searching for thread adaptor. There's a guy there that makes different adaptors and it seems he has some adaptors that attach by set screws.

Here is what you are looking for :

www.preciseinnovationsllc.com/muzzlebrakes.htm