Best AR-15 Piston Uppers & Conversion Kits [2017]

It seems like everyone and their mom makes a piston-driven AR-15 these days. And with good reason.

Piston-driven guns run cleaner and cooler than a standard direct impingement (DI) system, making them a big draw for high volume shooters such as those who shoot competitively like in 3-Gun.

They also just make all around great guns if you want to get into AR-15’s a bit more and try something different.

Who knows? You might just fall in love.

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