ProMag RollerMag AR-15 Extended Magazine, 5.56 NATO/.223 Rem., 40 Rounds

Overview

The ProMag RollerMag AR-15 Extended Magazine delivers increased capacity and exceptional reliability for AR-15 rifles chambered in 5.56 NATO/.223 Remington. Featuring a steel-lined Technopolymer body, over-molded steel feed lips, and a proprietary Roller Follower, this magazine ensures smooth, dependable feeding and long-lasting durability in demanding conditions.

Key Features

• 40-round capacity for extended shooting sessions without frequent reloads

• Steel-lined Technopolymer body for enhanced strength and durability

• Over-molded steel feed lips for a secure, wobble-free fit

• Proprietary Roller Follower for friction-free, smooth feeding

• Heat-treated, anti-fatigue chrome silicon wire spring for consistent performance over time

• Easy-loading design for user convenience

• Manufactured and assembled in the USA

Specifications

• Caliber: 5.56 NATO / .223 Remington

• Capacity: 40 rounds

• Material: Steel-lined Technopolymer with over-molded steel feed lips

• Spring: Heat-treated, anti-fatigue chrome silicon wire

• Finish: Black

• Compatibility: AR-15 platform rifles

• MPN: RM-40-SL

• UPC: 708279014512

Applications

Ideal for tactical training, competition, extended-range sessions, and scenarios where maximum capacity and feeding reliability are critical.

Additional Features

• Backed by ProMag’s lifetime warranty for lasting confidence

• Resistant to impact, harsh environments, and long-term storage fatigue