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I'm looking into doing a Colt XM177 vietnam build but since I dont have a preban lower I cannot have the 5.5" flashhider perm attached to it. For those that do not know these are 11.5" barrel uppers with a 5.5" perm flash hider on them.
Anyways Since I don't wanna sleeve the hider and block off the ports cause it just doesnt look right I was looking into other options. I found this.
US Machinegun: 5.5 Inch Ported Muzzle Brake for AR-15 1/2x28 Threads, AR-15 & AR10 PARTS & ACCESSORIES, AR-PRT28
Now I called them and talked to the owner on the phone and he said it was more of a comp then anything. It's not really gonna suppress flash with all the holes. What are your thoughts on this?

Anyways Since I don't wanna sleeve the hider and block off the ports cause it just doesnt look right I was looking into other options. I found this.
US Machinegun: 5.5 Inch Ported Muzzle Brake for AR-15 1/2x28 Threads, AR-15 & AR10 PARTS & ACCESSORIES, AR-PRT28
Now I called them and talked to the owner on the phone and he said it was more of a comp then anything. It's not really gonna suppress flash with all the holes. What are your thoughts on this?