AR muzzle break, accuracy problems?

[Strabs]

I've been reading about the various breaks for ARs lately and have narrowed the search down to Kurt's, Wilson's, and lastly the Bushy Y comp. I am not neccesarily in search of a break or compensator, but more of a muzzle protector. I do not like the exposed bore (even though it's recessed) hanging out there waiting to be damaged.
Many times I've seen mentioned that a break will cause the gun's accuracy to slack off. This is obviously a concern, but to what extent will the accuracy fall off?
The particular 16" (dissapator) rifle is strictly irons and will likely never see any use past 300 yds.

Thanks

[radom]

They really do not affect the accuracy of the gun unless its a match one hole type of gun but the Bush Y-Comp will make you flinch and jump shooting it. Its like having a 16 inch 30-06 go off in your face for blast. You can get the barrels with a recessed crown from Bush so you do not have to worry about bashing the bore in the end of the tube. The best is the A-2 GI flash suppressor as it brakes the barrel jump and cuts the blast and sound too but as its works well it is a no-no now.