ProMag RM-40-SL AR-15 5.56 NATO 40-Round Steel Lined Magazine

The ProMag RM-40-SL is a 40-round detachable magazine for AR-15 rifles chambered in 5.56x45mm NATO. It is built with a steel-lined polymer body, a design intended to add durability to the magazine's feed area and mag catch interface.

The magazine body is made of DuPont Zytel polymer, with stamped steel feed lips, a steel mag catch, and heat-treated chrome silicon spring wire. The follower is an anti-tilt roller design. The magazine is finished in black and is made in the USA.

The RM-40-SL is listed as fitting the AR-15 platform and is sold as a single magazine.

• Platform: AR-15
• Caliber: 5.56x45mm NATO
• Capacity: 40 rounds
• Material: DuPont Zytel polymer body
• Feed lips and mag catch: Stamped steel
• Spring: Heat-treated chrome silicon wire
• Finish: Black
• Made in: USA