I’ve got a 14.7” 6920 barrel with the A2 pinned. I ordered a Centurion C4 rail specifically because you can do it with the barrel and muzzle device on.
However, I got the 12” version with the FSP cutout and the bayonet lug needs to be removed. I won’t attempt this myself but is this a pretty easy job for a gunsmith to do with the FSP on the gun? Trying to avoid extra work by not having to remove the muzzle device.
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