{"product_id":"ar-15-button-rifled-barrel-oal-m4","title":"AR-15 Button Rifled Barrel OAL M4","description":"\u003ch2\u003eFN America AR-15 Button Rifled Barrel OAL M4\u003c\/h2\u003e\n\u003cbr\u003eMade from a strong mil-spec steel with black manganese phosphate finishing, this 16 button rifled FN America barrel is a great choice for any carbine length AR-15 rifle. Chambered in .223 Rem \/ 5.56x45mm, this chrome lined chamber with an M4 styled feed ramp will provide more consistent and reliable feeding while shooting. This barrel also features a 1\/2 x 28 threaded muzzle and a 1:7 RH twist rate.\n\u003cbr\u003e\u003cbr\u003eChrome lined chamber and bore help resist corrosion and provide heat erosion resistance that greatly improves barrel life, and reliability of chambering \/ extraction  Carbine length mil-spec barrel steel  Magnetic Particle (MP tested to ensure each barrel is free of microstresses and\/or cracks  Government profile, built for .750 diameter gas blocks  1\/2 x 28 threaded muzzle\n\u003cbr\u003e\u003cbr\u003eMPN: 20-100046\n\u003cbr\u003eUPC: 845737008420","brand":"FN America","offers":[{"title":"16\"\"","offer_id":52783769223453,"sku":"FNH-20-100046","price":173.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0859\/4083\/0493\/files\/FNH-20-100046.png?v=1787138709","url":"https:\/\/americanpolicesupply.com\/products\/ar-15-button-rifled-barrel-oal-m4","provider":"American Police Supply","version":"1.0","type":"link"}