I assume you are not talking about wanting a can?
The issue muzzle device is known as a flash suppressor. The early versions had 3 prong, then bird cage with vents all the way around and next is A2 Suppressor which has a even smaller flash signature.
The only way you are going to keep rifle on a target between shots is with a bipod or use a sling in prone position. The record at Aberdeen Proving Ground was a M16 was fired from prone position with bipod at E silhouette target at 100 yards for 60 seconds using SINGLE SHOT MODE and he hit target 157 times using 20 shot mags.
In full auto mode shooting at E silhouette target at 25 yards from standing, first shot hit dead center, second shot just grazed shoulder of E silhouette or missed it, third shots were another two feet higher. Right hand shoot recoil drives muzzle towards 1:00, left hand shooters muzzle goes towards 11:00.
Formerly Small Arms Test Director, Aberdeen Prov Gnd, Army Small Cal Wpns Lab, Mem Interagency Comm Sec. Equip. Wash, Intl Wound Ballistics Assn, Consultant to INS, USBP, DCIS, FLETC, 4 US Intl Rifle Teams NRA Bene, Vol FD, Eagle Scout, Shriner.
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