{"product_id":"solgwexo3upper-1p","title":"Sons of Liberty Gun Works  M4-exo3 5.56 Urg","description":"\u003ch2 id=\"sons-of-liberty-gun-works-m4-exo3-556-upper-receiver-group\"\u003eSons of Liberty Gun Works M4-EXO3 5.56 Upper Receiver Group\u003c\/h2\u003e\n\u003cp\u003eThe M4-EXO3 is the latest iteration of the EXO series rifles, designed for duty, service, and defense. This third-generation rifle incorporates several upgrades and refinements to enhance its performance and durability.\u003c\/p\u003e\n\u003ch3 id=\"specifications\"\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003eThe M4-EXO3 features a 5.56 NATO chamber with a 4150CrMoV (Chrome Moly Vanadium per MIL-B-11595E) barrel. The barrel is coated with a QPQ corrosion-resistant finish and has a 1\/7 twist six-groove rifling. The gas block is designed with a .750\" gas block journal and a gas port that is appropriately sized. The barrel extension is QPQ-coated and features a M4 feed ramp.\u003c\/p\u003e\n\u003ch3 id=\"features\"\u003eFeatures\u003c\/h3\u003e\n\u003cp\u003eThe M4-EXO3 incorporates several third-generation upgrades, including a 4140 steel barrel nut, an updated proprietary lockup with a custom 4140 set screw, and an anti-rotation pin from the M76\/M89. These features provide improved stability and reliability. The rail system has been modified to include slight finger grooves, similar to those found on the M76\/M89, and the lightening holes have been spaced out to stiffen the rail.\u003c\/p\u003e\n\u003ch3 id=\"performance\"\u003ePerformance\u003c\/h3\u003e\n\u003cp\u003eThis rifle is built to require minimum maintenance for years, ensuring that it remains reliable and effective throughout its lifespan. The QPQ corrosion-resistant finish ensures that the rifle can withstand harsh environments without compromising its performance.\u003c\/p\u003e\n\u003ch3 id=\"design\"\u003eDesign\u003c\/h3\u003e\n\u003cp\u003eThe M4-EXO3 comes in various barrel lengths to suit different needs, including 10.5\", 11.5\", 13.7\", and 16\". Each barrel length is designed for a specific gas system and muzzle device, ensuring that the rifle maintains optimal performance. The 13.7\" barrel, for example, uses a mid-length gas system with a P\/W Nox and B5 stock, while the 16\" barrel uses a mid-length gas system with an A2 muzzle device and B5 stock.\u003c\/p\u003e\n\u003ch3 id=\"components\"\u003eComponents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel\u003c\/strong\u003e: Sons of Liberty Gun Works 4150CoMOV 1:7 MPI HPT Barrel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber\u003c\/strong\u003e: 5.56 NATO Chamber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel Steel\u003c\/strong\u003e: 4150 CrMoV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwist Rate\u003c\/strong\u003e: 1\/7 Twist Six Groove\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Pitch\u003c\/strong\u003e: 1\/2-28 Threaded Muzzle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas Block\u003c\/strong\u003e: .750\" Gas Block Journal with appropriately sized gas port\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 25 Ounces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel Finish\u003c\/strong\u003e: QPQ Corrosion Resistant Finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel Extension\u003c\/strong\u003e: QPQ coated M4 Feed Ramp Extension\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 id=\"conclusion\"\u003eConclusion\u003c\/h3\u003e\n\u003cp\u003eThe M4-EXO3 from Sons of Liberty Gun Works offers a superior performance without compromising on durability and reliability. Its third-generation features and specifications make it an excellent choice for a variety of applications, from law enforcement to hunting and home defense.\u003c\/p\u003e\n","brand":"Sons of Liberty Gun Works","offers":[{"title":"13.7\"","offer_id":45077007139035,"sku":"SOLGWEXO3UPPER-137-556","price":807.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/1072\/7131\/files\/180002517.webp?v=1738363986","url":"https:\/\/www.atcostammo.com\/products\/solgwexo3upper-1p","provider":"AtCostAmmo.com","version":"1.0","type":"link"}