Hey Flipz. Did the 27" include your muzzle device? If so, which did you use? I'm filling out a form 1 now. Also, which stock did you use?
The 27" did not include a muzzle device as you're supposed to measure from the end of the stock (fully extended) to the tip of the muzzle. I plan on using a B5 SOPMOD Bravo stock. I got the measurement by putting the 8.2" upper on an already SBR'd lower that has the B5 stock.