SneakySh0rty
Active Member
I am getting ready to build my first SBR and this is confusing me.
How do I know what the OVERALL length will be if I can't have the parts until I get the stamp?
I am building a 300 with a barral length of 10 - 10.5, haven't decided yet (depending on manufacture) - will be suppressed.
compare it to a known completed SBR length in that caliber. Some list the OAL with the stock fully extended. Then subtract their stated barrel length with a flash hider.That gives you the measurement of the front of the upper receiver all the way to the end of the stock extended. Add that to your desired barrel length and you got an OAL. You can play it safe by writing an inch or 2 less than what you come up with. If you get your tax stamp, assemble, and it ends up being a little longer than stated, I dont see that as a bad thing. Not sure about what happens if its shorter than what's stated though...
I ran into the same issue when I was trying to determine my OAL, google and ar15.com helped.
