Does exactly what it is supposed to. - Advanced Armament Corporation Blackout 51 Tooth Flash Hider Fast Attach 5.56mm 1/2-28 TPI 100206

Function wise, this little device does exactly what it is intended to. I have exactly zero complaints about the function of this flash hider. It appears to be durable and well made. Make sure this is the correct product for your attachments (they must use the 51 tooth connections). My only reason for not offering 5 stars is lack of color/finish selection. Would be great if this was available in something other than a high gloss black finish. Other than that, near perfection.