Winchester made 601 barrels for Colt with 1:14” twist rifling ... brought on a meditation about the reliability problems that the XM16E1 and the M16A1 would ultimately experience in 1966 ...

Here’s What You need To Remember: The Chinese copy of the M16A1 rifle, the CQ, is an odd weapon. It is a faithful copy of the original M16A1, with a handful of very visible differences.