sorry, I just bought 4 more, they were on sale.
I should add, my minimum barrel length is 14.5. not sure if I would use them on a pistol or SBR. and I do make sure my rail is a few inches short of the brake, because that area directly behind the brake for a couple inches does get coated, maybe 3". but "black pepper" in my face or teeth? hasn't happened yet, and I've been using the M4-72 for years.
I could imagine if you had a 5" barrel AR pistol in 308, if that's even possible, and were shooting nose-to-charging-handle, the M4-72 would not be good. nope, I wouldn't want to shoot that. After some thought, I think that if your rail goes right up to the brake, the rail itself could channel some blast down the inside to your face, but like I said, I learned for the M4-72, the rail needs to end before the brake, not at the brake. After all, the rail itself is a tube. with some holes.
for 5.56, I use the LANTAC or the VG6 or SureFire brake. or the M4-72. but not as much benefit to be gained from the smaller round.
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