This is what 2A Armament says:


Building on our experience with lightweight firearms, 2A Armament set out to design a custom contoured 18" lightweight (31.5 oz) .308 barrel.  This barrel will ship as standard with our Xanthos rifle but is also available for individual purchase.


    4150 Barrel steel with QPQ Nitride
    .308 Caliber WIN MATCH
    Length 18"
    Rifle-length gas system .081 gas port
    1:10 twist, 5R rifling
    5/8-24 muzzle thread (.625 thread length)
    .750" diameter x 1.0” long gas block journal
    11 deg target crown
    LR-308 (DPMS Compatible) extension
    Weight - 1 lb 15.5 oz

18 2A Lightweight .308 Barrel

SKU: 2A-C308L18PB-1
$289.00 Regular Price
$274.55Sale Price