These are factory new and unfired Proof Research AR10 barrels that have been converted to work with an LMT MWS monolithic upper.
We have two calibers and lengths available.
20" 308 with a rifle length gas system
20" 6.5 Creedmoor with Rifle +2 gas system
22" 6.5 Creedmoor with Rifle +2 gas system
These barrels do not come with a gas block, one will need installed prior to using.