Product Description Aero Precision M4E1-T PRO Barreled AR-15 Upper Receiver - 5.56 - 16" - Hanson Mid CHF - MOD 4 15" Aero Precision M4E1-T PRO Barreled AR-15 Upper Receiver - 5.56 - 16" - Hanson Mid CHF - MOD 4 15" at Primary Arms Browse all Primary Arms deals $744.99 Out of Stock Price checked 5 days ago Buy Now at Primary Arms Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand Aero Precision Aero Precision