So I read that the ATF advised how to measure OAL is to lay the firearm down mark the end of the barrel without any permanently attached muzzle device and with any length adjusting stock / brace at its full point.
My question is, what if your barrel minus the muzzle device ISNT the longest part of your rifle?
My Barrel is 10.5, its inside a 12" rail. The barrel's muzzle device is not permanent, but is needed for safety since firing the weapon without the muzzle device would blow the last 2" of the rail off![AR15 :ar15: :ar15:](/images/smilies/AR15firing.gif)
So is my firearm OAL measured from the end of the rail or do I need to remove the rail and measure from the end of the barrel threads?
Just as an example for a COP upper https://aeroprecisionusa.com/cop-m4-mid-length-upper-receiver-kit-black.html
Mine is not a COP upper. The rail is attached to the barrel nut like most rails are.
My question is, what if your barrel minus the muzzle device ISNT the longest part of your rifle?
My Barrel is 10.5, its inside a 12" rail. The barrel's muzzle device is not permanent, but is needed for safety since firing the weapon without the muzzle device would blow the last 2" of the rail off
![AR15 :ar15: :ar15:](/images/smilies/AR15firing.gif)
So is my firearm OAL measured from the end of the rail or do I need to remove the rail and measure from the end of the barrel threads?
Just as an example for a COP upper https://aeroprecisionusa.com/cop-m4-mid-length-upper-receiver-kit-black.html
Mine is not a COP upper. The rail is attached to the barrel nut like most rails are.
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