View Full Version : Whats the barrel length on a mid length upper?
16, 18, or 20 inches? Thanks.
16". Carbine length, different gas system.
There are also 18" (or will be soon, from BCM).
Mid-length refers to the gas system length, not the barrel length.
The carbine-length gas tube is about 7.5 inches, the mid-length gas tube is about 9.5 inches long, and the rifle length gas tube is about 11.5-12 inches long.
Barrel length can differ.
There is supposedly a 14.5" midlength in the works from BCM. Couple that with a lightweight barrel, and it just might be something I'll have to add to the list.
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