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The Colt Canada C8 carbine range are carbine variants of the C7 family, and are mechanically and visually very similar to the Colt Model 723 M16A2 carbine. Colt made the initial C8s for Canadian Forces as the Colt Model 725. The C8 has a 368 mm (14.5 in) A1 profile barrel like the Colt Model 653 M16A1 carbine, but with a 1 in 178 mm (7 in) rifling twist appropriate for adequately stabilizing the 5.56×45mm NATO C77 cartridge L109 ball and the C78 cartridge longer L110 tracer projectiles and the design improvements featured on C7 assault rifles. The C8 has a cyclic rate of fire of around 750–950 rounds per minute (RPM).
The Colt Canada C8 carbine range are carbine variants of the C7 family, and are mechanically and visually very similar to the Colt Model 723 M16A2 carbine. Colt made the initial C8s for Canadian Forces as the Colt Model 725. The C8 has a 368 mm (14.5 in) A1 profile barrel like the Colt Model 653 M16A1 carbine, but with a 1 in 178 mm (7 in) rifling twist appropriate for adequately stabilizing the 5.56×45mm NATO C77 cartridge L109 ball and the C78 cartridge longer L110 tracer projectiles and the design improvements featured on C7 assault rifles. The C8 has a cyclic rate of fire of around 750–950 rounds per minute (RPM).