ProMag RM40FDE 40rd AR-15 Magazine 5.56x45mm FDE

The ProMag RM40FDE is a 40-round detachable magazine designed for AR-15 platforms chambered in .223 Rem / 5.56 NATO. It is molded from DuPont Zytel polymer in a Flat Dark Earth finish and features an anti-tilt roller follower. Magazine springs are precision wound from heat-treated chrome silicon wire, and the magazine is made in the United States and backed by a lifetime guarantee against manufacturer defects.

Key Specifications

• The caliber is listed as .223 REM/5.56 NATO.
• The capacity is 40 rounds.
• The magazine is designed to fit the AR-15 platform.
• The material is DuPont Zytel polymer.
• The finish is Flat Dark Earth.
• The magazine employs an anti-tilt roller follower.
• The spring is made from heat-treated chrome silicon wire.
• The model is designated Standard (RM40FDE).
• The product type is a detachable magazine.
• The country of manufacture is United States.

Built for consistent feeding and long-term service, the RM40FDE provides high-capacity utility for range sessions, competitive disciplines, and training. Its polymer construction and robust spring system balance weight and durability while the roller follower helps reduce tilting and feeding issues. For shooters seeking a reliable AR-15 magazine in a subdued Flat Dark Earth finish, this ProMag unit offers a practical, field-ready option.