The AR-7 Industries AR57-ULT16 is a complete 5.7x28 upper assembly that converts an AR-15 style firearm to FN PS90 magazine compatibility. Built as a drop-in ready upper, it ships with an included 50rd PS90 magazine and features an M-LOK rail forend for flexible mounting options.

Key features

• Converts an AR-15 style platform to fire 5.7x28 using FN PS90 magazines
• Complete upper assembly designed for drop-in readiness with no modification
• 16-inch barrel length for a balanced setup
• M-LOK rail forend for mounting lights, optics, and accessories
• Includes one 50rd FN PS90 magazine

Add 5.7x28 capability to your AR-15 style build with a ready-to-install upper from AR-7 Industries.