Promag Ruger 57 5.7x28mm 20rd Blue

The Promag Ruger 57 5.7x28mm 20rd Blue magazine is a purpose-built aftermarket magazine designed for Ruger 57 platforms chambered in the modern 5.7x28mm cartridge. This 20-round capacity magazine feeds the high-velocity intermediate round with reliable feeding geometry optimized for the Ruger 57's magazine well and feed system.

The 5.7x28mm cartridge is characterized by high velocity and low recoil impulse, making accurate follow-up shots achievable even in rapid-fire strings. A 20-round magazine capacity extends time between reloads during training sessions or duty applications without adding excessive weight to the platform. The blue finish provides visual differentiation and corrosion resistance compared to bare metal, important for magazines stored in varying environmental conditions or used in higher-humidity settings.

This magazine suits shooters running the Ruger 57 for defensive pistol training, sport shooting, or duty carry where the 5.7x28mm's ballistic profile and capacity are relevant factors. Ruger 57 owners seeking extended-capacity alternatives or backup magazines will find Promag magazines serve as a practical secondary source to factory magazines, allowing greater round-count practice without repeated unloading.

The 5.7x28mm category has gained adoption in civilian and professional circles due to its low recoil and flat trajectory over intermediate distances. Magazines like the Promag 20-rounder support sustained training and real-world use without requiring caliber conversion or platform changes.