The BROADSWORD-89 uppers and Drivelock (89 series) rails deliver an exceptionally rigid interface, utilizing a traditional two-piece AR-15 construction. The design features an extended barrel nut, Drivelock tensioning crossbolts and a keyed upper receiver face that integrates seamlessly with the 89 series rails. These components, along with anti-rotation tabs and a stainless steel center index dowel, enable the transformation of nearly any lower receiver into a match-grade rifle. Although the billet BROADSWORD upper receivers are specifically engineered for precision, they maintain compatibility with standard dimension mil-spec contour lower receivers. The three-groove polygonal rifled 416 stainless barrels have garnered attention since their introduction, providing true sub-MOA performance in small frame gas guns at a competitive price point. Additionally, the barrels are equipped with a 5/8-24 thread to enhance precision, complemented by purpose-built muzzle devices designed to optimize this feature. The upper receiver is extensively reinforced throughout its entire profile to enhance the rigidity of the interface between the barrel and the mounted optics