Direct Impingement

Long-Stroke Piston System Cutaway in Ultra Slow Motion

A standard AR-15 uses a direct impingement system. While there are many benefits to such a system, does have drawbacks. A gas piston system is a different method to cycle a firearm that has its own set of advantages and disadvantages. So let’s “ooh” and “ahh” at ultra slow motion footage of Primary Weapon Systems’ long stroke piston system.

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