Mission First has refined and enhanced upon the classic STANAG magazine design with modern materials features and improved design.This windowed 30-round AR-15 Magazine has two durable and anti-glare transparent panels built in featuring capacity indicator numbers and a high-visibility "rounds-remaining" indicator mounted to the coil.This system shows your approximate rounds remaining at a glance from 0-30! Check out the images to watch the capacity indicator rise and fall!When extracting your Mission First windowed magazine the stipple texture the low-profile front ribs and flared floorplate all help to provide a good grip.Your magazine is protected from cracking against hard floors thanks to the tough polymer floor plate which also features a paint pen matrix so you can easily identify your mag later on.Also in the base of the magazines are drain holes for maritime activities or a very rainy range day.Mission First AR-15 223/5.56 magazine 30-round with windowsWindows with hi-viz capacity indicator mounted to internal springFloorplate resists cracks drains waterInternal stainless steel springs and anti-tilt follower for reliable feedingExaggerated bolt-catchSuper-Tough polyamide body materialGrab yourself some reliable Mission-First magazines suitable for the law enforcer competitive shooter or home defender.Looking for more AR-15 magazines? Get big savings when on our entire online inventory of low-priced AR15 Mags for sale