Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: Is the brake it self is the A311 steel?? I've seen another older model that was AL brake and AL sleeve and want to confirm it up that THIS is the A311
Document: Easy installation in ar pistol. Very well machined and sleeve can be removed for using the brake by itself. On the pistol it helps to redirect the gases forward to avoid the occasional blast to fingers that slide a bit past the end of the handguard. Looks great too.
I like this I use it between my 10-22 and sr22 pistol. The only thing I missed was the inner is steel and the outer is aluminum but it actually works to keep the weight down. This is really helpful for those using pencil barrels, like the factory with a thread adapter.
I have not gotten to take my 1022 out and shoot it with this muzzle brake yet but the look of it is hard to pass up!
Pretty cool gadget you dont need ear plugs if you leave the mini shroud off you get the aggressive look of a muzzle brake
The machining and style are well done but the bore is too large to be effective on .223 caliber rifles. It looks like they use a universal bore instead of designing properly for the caliber which greatly reduces the efficiency of the brake.
Looks good and is functional. The muzzle blast from a .22 isn't all that great, but a shooter and those standing behind the shooter will notice less blast when using this device.The muzzle brake is aluminum,  so you are not adding a lot of weight to the end of your barrel.
This mounted real easily to my 10/22 after the adapter was installed. Definitely gives the gun a cool look, but I haven't really had the chance to fire with it on there. But I don't foresee any problems, since I used Locktite on the main brake, just not the sound redirect.
This is a well made unit. The function was supposed to the re-direction of muzzle bast/noise or it could be used as a simple muzzle brake. I have used it and it fits all my threaded .22s very well. I just can't tell much diff in noise as I perceive it. Your experience may be different.
My local smith' removed my pin/welded Miculek Comp/Brake and installed this one in its place with new pin/weld.Testing the redirect on Wed.UPDATE.. the redirect definitely works.. it cuts the CRACK NOISE down to the point of not hurting your ears (still recommend plugs)..Makes a neat fireball too..
I bought this for my Chiappa Little Badger and my S&W M&P 15-22. The picture makes it look bigger than it actually is. Screwed on easily. Redirects noise away from you well, although if there are objects in front of you that can rebound the sound waves, then this will probably negate that particular benefit. The shroud removes easily if you just want to go with the muzzle break only. I personally did not notice any difference in accuracy after putting this on.
Answer: no