The Guntec USA BAR-16-TIN-HP-CAR 16 5.56mm barrel embodies cutting-edge precision engineering, elevating your shooting experience to new heights. Constructed from robust 4150 Chromoly steel, its high polish tin coating not only enhances aesthetic appeal but also significantly boosts durability and performance in various shooting scenarios. 4150 Chromoly Steel 5.56/.223 Chambered in 5.56x45 1:7 Twist for enhanced projectile stability 1/2 by 28 Thread for compatibility M4 Contour Profile for balanced handling Markings Spiral Engraved Near Break .750 Gas Platform System High Polished Tin Coating (Gold Titanium Nitride Finish) Aesthetic Coating which improves durability & lubricity M4 Feed Ramps for reliable performance Carbine Length Gas System Weight: 32 oz Enhance your firearm's capabilities with this exceptional barrel, ensuring uncompromised accuracy and reliability.