SI Defense LR-308 barrels are made from 4140 chrome moly steel and use button rifling. The barrel is chambered in 308 Winchester with a 1 in 10" twist. The M110 SASS profile is heavy under the handguard and .875" at the gas block. The muzzle is threaded 5/8"-24 to accept muzzle brakes, flash hiders, or a suppressor. The barrel is finished with a mil-spec manganese phosphate finish. This barrel is compatible with DPMS LR-308 Bolt assemblies and other parts.
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