The bolt-action rifle was forever changed with the introduction of the Browning X-Bolt. The X-Bolt builds on the proven successes of past Browning rifles, and adds numerous improvements that place the X-Bolt at the top of any side by side comparison. Most notable is an adjustable three-lever Feather Trigger system that offers the best feel on any Browning rifle ever. A bolt unlock button works with the top-tang safety to offer enhanced safety while unloading. Styling features offer more compact dimensions for a smaller, quicker, sleeker look and feel, and also trims weight. To ensure the stability of optics, scope bases are attached to the receiver using four screws per base.