This Ruger AR-15 magazine fits the Ruger SR-556 AR-556 and other AR platform weapons.This magazine features stainless steel construction precise robotic welds brightly colored follower and a reliable internal spring. 30 round capacity - .223 Remington/5.56x45Fits AR platform weapons including the Ruger SR-556 and AR-556Ruger pairs these reliable stainless steel magazines with their rifles as they perform consistently.Please note these magazines will not function with Ruger Mini-14 or Ruger Mini-30 weapons and are for AR-platform weapons only. Looking for more AR-15 magazines? Get big savings when on our entire online inventory of low-priced AR15 Mags for sale