JAMB----OMATIC.....Cheap Build....Cookie Cutter Parts...
Bullschit!
They only jam for idiots who don't know how to properly clean a gun.
Keep it clean and dry, it'll fire every single time. One of the best auto rifles ever made.
Our M16s were exactly the same as the 742. In the desert we had to keep them clean and dry. Too much oil, they accumulated dirt and jammed.