Rock Island 51421MA GI Standard .45 ACP 5" MA Compliant 8+1

The Rock Island 51421MA GI Standard delivers authentic 1911 performance in a Massachusetts-compliant configuration. This full-size .45 ACP pistol combines traditional GI specifications with modern manufacturing precision for reliable service and competitive shooting applications.

What Makes This Different

The GI Standard maintains original military specifications while incorporating enhanced manufacturing tolerances for improved consistency. The black Parkerized finish provides superior corrosion resistance compared to basic bluing, extending service life in harsh conditions. Massachusetts compliance features ensure legal ownership while preserving the classic 1911 operating system that has proven reliable for over a century.

Key Features

• 5-inch barrel with traditional GI profile for proven accuracy and reliability
• 8+1 capacity with single-stack magazine design for slim profile
• Black Parkerized steel finish resists corrosion and wear
• Beavertail grip safety prevents accidental discharge during holstering
• Serrated slide top reduces glare and improves sight acquisition
• Traditional wood grips provide secure hold and classic appearance
• Massachusetts compliant configuration meets state requirements

Range performance demonstrates the reliability 1911 platforms are known for, with consistent feeding and ejection across various ammunition weights. The 5-inch barrel length provides optimal velocity for .45 ACP cartridges while maintaining manageable recoil characteristics. Competition shooters appreciate the crisp single-action trigger and natural pointing characteristics, while the platform's modularity allows for future customization.

Technical Specs

• Caliber: .45 ACP
• Barrel Length: 5 inches
• Capacity: 8+1 rounds
• Frame Material: Steel with beavertail grip safety
• Slide: Steel with serrated top
• Finish: Black Parkerized
• Grips: Wood
• Action: Single-action semi-automatic
• Overall Length: 8.5 inches
• Weight: Approximately 39 ounces
• Manufacturer: Rock Island Armory
• Compliance: Massachusetts approved configuration

This GI Standard represents proven 1911 engineering at an accessible price point, making it suitable for both new shooters learning the platform and experienced users seeking a reliable full-size .45. The Massachusetts compliance ensures legal ownership while maintaining the performance characteristics that define the 1911 design.