ASG STI Duty One CO₂ BB Airgun – Black (4.5mm)

The STI Duty One is a fully licensed CO₂-powered airgun based on the iconic 1911 platform, enhanced by STI® International (Texas, USA) for modern tactical use. This non-blowback version offers semi-automatic shooting with 4.5mm (.177) steel BBs, powered by a 12g CO₂ cartridge cleverly housed in the grip using an easy-load system.

Built with a high-strength polymer frame and a heavy-duty metal slide, it features authentic STI® markings, a threaded barrel for a mock suppressor, and a tactical accessory rail for mounting a flashlight or laser (not included). The STI-logoed grip with extended beavertail ensures a secure and comfortable hold. Each airgun comes with a unique serial number for added authenticity.

Key Features:

• Caliber: 4.5mm (.177) steel BB
• Action: Semi-automatic, non-blowback
• Power Source: 12g CO₂ cartridge
• Material: Polymer frame with metal slide
• Threaded barrel (compatible with mock suppressor)
• Tactical accessory rail (light/laser-ready)
• Licensed STI® trademarks and serial number
• Ergonomic grip with high-rise beavertail