ProMag MOSA1 25-Round Magazine for Mossberg 715T .22 LR

The ProMag MOSA1 magazine transforms the Mossberg 715T into a high-capacity rimfire platform with reliable 25-round feeding capacity. This extended magazine combines blued steel construction with a polymer body extension for enhanced durability and extended shooting sessions.

What Makes This Different

Unlike standard 10-round magazines, the MOSA1 delivers 2.5 times the capacity without compromising reliability. The blued steel body provides corrosion resistance while the polymer extension reduces overall weight compared to all-metal alternatives. Heat-treated steel construction ensures consistent spring tension through thousands of loading cycles.

Key Features

• 25-round capacity for extended shooting without frequent reloads
• Blued steel body construction resists corrosion and wear
• Polymer body extension reduces weight while maintaining strength
• Heat-treated internal spring maintains consistent tension
• Drop-free design enables rapid magazine changes
• Compatible exclusively with Mossberg 715T rifles
• Witness holes allow visual ammunition count verification

Field testing demonstrates reliable cycling with standard and high-velocity .22 LR ammunition across temperature ranges from 20°F to 110°F. The magazine functions effectively in competitive shooting scenarios where rapid follow-up shots matter, as well as extended plinking sessions and small game hunting applications. The steel construction maintains dimensional stability under repeated loading stress.

Technical Specs

• Capacity: 25 rounds of .22 Long Rifle ammunition
• Construction: Blued steel body with polymer extension
• Compatibility: Mossberg 715T rifles only
• Overall length: Approximately 7.5 inches
• Weight: 4.2 ounces empty
• Finish: Blued steel with matte black polymer
• Manufacturer: ProMag Industries

The MOSA1 addresses the capacity limitations of factory magazines while maintaining the reliability Mossberg 715T owners expect. ProMag's established reputation for aftermarket magazines ensures consistent quality control and dimensional accuracy.