Product Description Proof Research PR15 6mm ARC AR-15 Barrel - Intermediate Length - Stainless - 14.5" Proof Research PR15 6mm ARC AR-15 Barrel - Intermediate Length - Stainless - 14.5" at Primary Arms Browse all Primary Arms deals $649.00 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