It wasn't accessible on thirty” barrels, deer guns, concentrate on guns or to be a retrofit. This patented procedure allows the shooter to utilize a wrench to change the shotgun to entire, modified or improved cylinder chokes. Remington also added the 12-ga. Model 870 SP Distinctive Goal Deer Gun towards https://pumpaction68889.imblogs.net/62110556/facts-about-remington-gauge-pump-action-shotgun-revealed