The GX4XL is built on the same award-winning polymer receiver as the GX4. Hailed for its exceptional handling characteristics in a micro-compact profile, the GX4XL's hybrid stainless steel and polymer receiver includes a modular grip with standard or high-swell backstrap options for a custom fit, industry-leading grip texturing for optimal firearm control, an ergonomic and reversible magazine release to promote no-fumble mag swaps, and a class-leading flat-face target trigger with a generous trigger guard to accommodate all hand sizes. What separates the GX4XL from the GX4 is its extended barrel and slide assembly. The GX4XL barrel is .64 inches longer than that of the GX4. This extended length translates to an increase in muzzle velocity and harder hits downrange. With this increased barrel length comes a longer slide profile and subsequent extended sight radius. Already noted for its remarkable accuracy, the GX4XL further tightens the point-of-aim/point-of-impact ratio. In short, the deep-conceal GX4XL's micro-compact design gives up nothing in the kind of terminal performance, accuracy, and handling serious EDC practitioners demand. For those who favor a micro red dot for their EDC handgun, the GX4XL is also available with the T.O.R.O. (Taurus Optic Ready Option) slide. This optional slide features a direct-thread (no plate) mounting system that accommodates the most common micro red dots on the market today: