ProMag AR-15 5.56 NATO 40-Round Magazine

The ProMag RM40SL is a 40-round magazine designed to fit AR-15 rifles chambered in 5.56 NATO. It features a black DuPont Zytel-based polymer body, steel-lined feed lips and magazine catch, and an anti-tilt roller follower.

Built for practical range use and rifle setup flexibility, this magazine uses a heat-treated chrome silicon wire spring and is made in the USA.

Key Specifications

• The magazine has a 40-round capacity for AR-15 rifle applications.
• It is designed for 5.56 NATO AR-15 rifles.
• The body is made from DuPont Zytel-based polymer.
• The magazine has a black finish.
• It uses over-molded stamped steel feed lips and a steel magazine catch.
• The anti-tilt follower is a roller follower.
• The spring is formed from heat-treated chrome silicon wire.
• The magazine is made in the USA.

With its polymer construction, steel-reinforced components, and roller follower design, the ProMag RM40SL provides a clearly specified magazine option for AR-15 platforms chambered in 5.56 NATO.