Posted March 10, 2015 9:03 am by Comments

By Nicholas C

Proof research

Four Guys Guns posted this video on their website. I can’t embed the video so here is the link. It is a short video showing the manufacturing of Proof Research Barrels and SI Defense receivers. Proof Research makes carbon fiber wrapped barrels. Here is a video we posted last year. SI Defense […]

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Via:: The Firearm Blog

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