Product Description Proof Research PR15 6mm ARC AR-15 Barrel - Intermediate Length - Carbon Fiber - 16" Proof Research PR15 6mm ARC AR-15 Barrel - Intermediate Length - Carbon Fiber - 16" at Primary Arms Browse all Primary Arms deals $999.00 Out of Stock Price verified today Buy Now at Primary Arms Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand Proof Research Proof Research