I don't go by model numbers anymore. Center or stagger fed, Top or bottom bolt release. Pre accutrigger or accutrigger(1, 2 and 3). Target action and no. Large shank or small. Stainless or not. Old firing pin or new firing pin. Barrel profile.....
I cant take a Remington 223 and make it a 308. Feed ramps and bolt are different.
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