Quote Originally Posted by SethB View Post
The Ljungman was nowhere near as refined as the Stoner system. In Stoner's system, the bolt is pushed forward by gas, unloading the bolt and rotating it at the same time. This is what makes such small lugs successful. Piston guns require a lot of work to keep the load even on the lugs.
I don't follow what you are saying - I thought that with most Stoner weapons - as with most, if not all, auto/semi auto small arms the bolt is pushed FORWARD (assuming the front is the muzzle, which I do) by a spring and backward via gas.