Genesis Arms' Gen-12 AR-10 Shotgun Upper allows you to turn your AR-10 into a 12 Gauge!

While the prospects of a 12-gauge AR are exciting, it's certainly far from mainstream. In the past it was believed that the AR-10 platform was difficult enough to make reliable in its original .308 caliber. Modern makers like Stag with its 10S and DoubleStar with its 10B have changed that. With optimism, I slapped the Gen-12 on my DoubleStar lower and before anything else wanted to know does it work?

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