Rock River is also proud to offer the LAR-BT3 series of rifles in a variety of popular calibers! This LAR-BT3 series rifle is designed specifically for the varmint hunter. The X-1 Varmint Rifle is chambered in the .308 Winchester cartridge and features a 20" stainless bull barrel. A lightweight 17" extended M-LOK rail offers plenty of space for attaching a bipod, infrared device, flashlight and more and a full length Picatinny rail is the ideal way to add your choice of optic. The LAR-BT3 series of rifles are all built on a pair of uniquely designed LAR-BT3 billet aluminum receivers, and the X-1 Varmint comes with an RRA Operator A2 stock and a rubber Hogue pistol grip. Varmint hunters are sure to bag their prey with this rifle from Rock River Arms.