This allows greater wear life (2 toģ times M16) and lets us machine C9 barrels from the same barrel blank. (Chamber, bullet lead, diameters) the bore has dimensional reduction as theīullet moves forward (squeeze) to increase life and accuracy. The bore dimensions were developed to fire C77 ammunition, This process produces a barrel that is much stronger than the US The Material is to a formula developed here inĭiemaco (under Gov‘t contract) so that the entire bore and chamberĬonfiguration can be integrally formed in one operation on a rotary hammerįorge. The C7 barrel is not the same as any M16 barrel except for the exterior As is the cartridgeĭeflector, handguards and many other changes. Profile, 1 turn in 7inch barrel is definitely M16A2. Reference to the sight option first chosen by the CF. The reference to the rifles origins (M16A1E1) is in In the case of theĬ7 it included iron sights and was extended (I think) when the C79 sight and

Office (DLR), usually before the weapon is even bought. So when you seeĮffective range, it is almost always a subjective assessment of the systemĬapability derived by the user instructor (CTC) and rifle requirements Man, sights, weapon ammunition and expected employment. Is an infantry doctrine distance to do with the whole system including the The effective range published does not have much to do with the barrel but I‘m afraid I have been avoiding theĪlligators chewing on my ankles to take care of the ones feeding higher up. Further, the barrel has squeeze (reducing bore diameter over the length of the rifling) to increase accuracy. The Canadian design utilizes a proprietary steel that claims to increase barrel life 2-3 times over a chrome-lined 4150 barrel in US rifles. The most interesting nugget is the claim for barrel life. While the C7 is built off of the Technical Data Package from Colt, the Canadians claim to have made over 150 changes improvements to the basic rifle prior to entering production. According to user “RebelRouser” on, the Canadian C7 rifle is a markedly different from the standard M16 issued to US armed forces.

M16 barrel markings