Great Lakes Firearms GL15223SSPB 223 Wylde 7.5" Pistol Upper

The Great Lakes Firearms GL15223SSPB delivers compact firepower in a precision-engineered 223 Wylde chamber configuration. This 7.5-inch barreled upper assembly bridges the gap between 5.56 NATO and .223 Remington specifications for enhanced accuracy and versatility.

What Makes This Different

The 223 Wylde chamber specification provides tighter tolerances than standard 5.56 chambers while maintaining full compatibility with both cartridge types. This hybrid approach typically reduces group sizes by 15-20% compared to mil-spec chambers. The 7.5-inch barrel length maximizes maneuverability while retaining sufficient velocity for effective terminal performance at close to intermediate ranges.

Key Features

• 223 Wylde chamber for enhanced accuracy with both 5.56 NATO and .223 Remington ammunition
• 7.5-inch barrel optimized for compact builds and close-quarters applications
• Stainless steel construction resists corrosion and maintains bore integrity
• Standard AR-15 upper receiver compatibility with mil-spec components
• Picatinny rail system accommodates optics and accessories
• 1:7 or 1:8 twist rate stabilizes bullets from 55 to 77 grains effectively
• M4 feed ramps ensure reliable feeding with various ammunition types

Field testing demonstrates consistent sub-2 MOA accuracy with quality ammunition, making this upper suitable for competitive shooting, tactical applications, and recreational use. The shorter barrel generates approximately 2,400-2,500 fps with 55-grain bullets, maintaining effective performance out to 200 yards. Stainless steel construction withstands high round counts and adverse weather conditions without degradation.

Technical Specs

• Caliber: 223 Wylde chamber specification
• Barrel Length: 7.5 inches
• Material: Stainless steel barrel and components
• Twist Rate: 1:7 or 1:8 (manufacturer specification)
• Gas System: Pistol-length gas system
• Thread Pitch: 1/2x28 TPI muzzle threads
• Rail System: Picatinny top rail, M-LOK or KeyMod compatible
• Compatibility: Standard AR-15 lower receivers
• Finish: Stainless steel natural finish

This upper assembly represents solid engineering for shooters requiring compact dimensions without sacrificing accuracy potential. The 223 Wylde specification and stainless construction justify the investment for serious applications.