I have the Wilson combat muzzle break on my Bushy Dissipator and here are my thoughts on it:
-First off it changes the balance of your rifle, making it more barrel heavy, subtle but bothersome nevertheless.
-Second, when it was returned from Wilson's they essentially placed it in a flimsy cardboard box and mailed it to me with virtually no wrapping or padding/cushioning.
-Thirdly, possibly due to reason second above, or due to Wilson's mis-handling, my barrel came back with a gash in the finish. Also the finish that I received from them near my barrel is all screwed up.
-Lastly, Wilson totally screwed up my front sight. My front sight is now no longer moveable (it's like welded in place), and the rifle shot about a foot higher (at 100 yrds) then it did before the muzzle break was attached.
What I think Wilson's is doing is they take your rifle and clamp the whole front of the barrel (including the front sight) in a giant vise and proceed to torque like hell on the front of the barrel to cut the threads and place the muzzle break. Then when your Parkerization is totally screwed up they take some black paint and cover up the bare metal.
My front sight is so totally f-ed up now. It was unbelievably sloppy work from Wilson's. I will never ever purchase anything from them again. Ever.
P.S. Did you read the article in Gun Test magazine where they found that that "custom tuned" AR from Wilson's shot like a total POS. I think, if my memory serves me correctly, that it shot 3.0 MOA. I mean that's like Mini-14 quality. Imagine $1800 bucks to shoot like a Mini-14. Something is seriously wrong at Wilson Combat.