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Then comes price. Ruger introduced a piston system AR—the SR15 —that retails for over $2,000. I found an M4 from one of the more popular piston-gun makers listed on for $1,925.
The gas system of the Winchester Model 100 semi-automatic sporting rifle is similar to that of the M14 rifle. This was pointed out by Winchester when the Model 100 was announced in 1960.—E.H ...
Designed to compete with budget AR-15, the rifle features a highly similar layout to the AR, but an AK-like operating system that uses a long-stroke gas piston and a charging handle integrated on ...
AR-15 GAS SYSTEMS Now that you know the basics of the AR-15, we’ll get into more complicated stuff. There are two primary types of gas systems for the AR-15. They are DI and Piston.