Agreed.. the Kak tube is a little longer than a standard pistol buffer tube. My oal is to the barrel muzzle, not including the end of barrel device, as I choose to not pin and weld it. I use the spacers to increase the 'lop' for the sig brace as I have monkey arms (long) and it was a little too short for my liking. They have a 1/2" and a 1" spacer, I am using the 1" for now, see how that works and it does not (I'm fairly certain, according to BATFE) increase the oal of the weapon. My builds are both very close to 26.5" rear of the buffer tube to the muzzle. If I add the spacer in that it would be 27.5" to the muzzle from the rear of the brace, but I'm pretty sure it don't work that way.. lol
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