Christensen Arms strives to craft the finest 1911 handguns ever produced, and the new A4 and A5 aluminum-framed 1911s are no exception. Currently available in 9MM, each frame is machined from 7075 billet aluminum and assembled using only premium components, including a tunable match-grade trigger. After being machined, each newly-designed slide is hand fit to its frame to guarantee a perfectly smooth and highly accurate handgun - a 5-shot, 2 inch group at 25 yards. Stainless Steel Match Grade Barrel. 7075 Billet Aluminum Frame. 17-4 Stainless Steel Billet Slide. Adjustable Overtravel. Skeletonized Hammer and Trigger. Checkered Front Strap. Checkered Mainspring Housing. G10 Grips. Beavertail Grip Safety. Full Length Guide Rod.