AR Sponsor
Posted: 3/23/2009 8:30:44 PM EDT
|
I'm looking at doing a mid-length barrel. I've searched and found alot of general information on the mid-length gas port location (about 9")
but does anyone know the exact measurement, say from the breech or the barrel extension? thanks!! |
|
From AR15barrels:
From the barrel torque shoulder where the barrel extension torques against, it's 6.75" for carbine, 8.75" for mid-length and 12.125" for rifle to the step at the rear of the gas block seat. Breach face is 3/4" back from the torque shoulder. Gas port is usually 0.275" to 0.295" forward of the rear step, depending on if there is a handguard cap in the design or not. You should be able to figure everything else out from that... –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– I built a midlength according to these measurements, and it functions just fine. |
AR Sponsor