This is what 2A Armament says:
2A Armament is proud to offer our own branded lightweight barrel. These barrels are manufactured in the USA and are the same barrels that ship with the BLR-16 rifle.
Features and Specs:
416-R Stainless Steel with QPQ Nitride finish
5.56 Caliber
mid-length gas system, .078" diameter gas port
.625" gas block diameter, 1.1" gas block journal length
1 in 8 twist
1/2-28 threads on muzzle
M4 barrel extension
11 deg target crown
Magnetic Particle Inspected
Weight - 1 lb 3.1 oz
16 2A Lightweight 5.56mm Barrel
SKU: 2A-C556L16PB-1
$189.00 Regular Price
$179.55Sale Price