BudsGunShop.com - Barrel lining

Timothy, no Sir. This rifle has a "22 inch National Match medium-weight ***Stainless Steel*** barrel with four grooves and 1:8 inch twist rate & ported California muzzle brake.

No it is a stainless steel barrel "The M1A’s National Match Grade, 22-inch medium weight ****stainless steel barrel provides a long sight radius with a 4-groove 1:8 right hand twist and shot-steadying muzzle brake for accuracy. NM Grade .062 post front sight and non-hooded .0520 aperture rear sight ideal for far targets, adjustable for ½ MOA windage and 1 MOA elevation. The 2-stage trigger is NM-tuned to 4.5 – 5 pounds for a crisp pull. A true 1000-yard rifle that delivers a level of shooting satisfaction few rifles can match, especially when paired with an SA scope mount and your optic of choice." springfield-armory.com/products/m1a-loaded-6-5-creedmoor/#MA9826C65CA

Timothy, no this barrel is stainless steel and already corrosion resistant.