With its fixed V-block machine rest stock, multi-fluted muzzle brake, and unique octagonal receiver. The AR-30 is similar in design to the innovative ArmaLite AR-50. Available in three calibers-.300 Win Mag, 7.62mm and .338 Lapua - the AR-30 is equipped with a triple lapped barrel and 5 round detachable magazine for fast reloads during matches. Stunningly Accurate! Shown with optional bi-pod, scope and mount Model: 30M300 for .300 Win Mag Caliber: .300 Barrel: 26" Chrome Moly, 6 Groove, Threaded 5/8 - 18 UNF - 3A Rifling Twist: RH 1:10" Muzzle Device: Highly Efficient Multi-Flute Recoil Check, Very Moderate Felt Recoil Upper Receiver: Modified Octagonal Form, Drilled and Slotted for MIL STD Scope Rail with Boss to Engage Cross-Slot on Receiver Bolt: Dual Front Locking Lug Trigger: Schilen Standard Single Stage, Approximate 5 lbs Pull Stock: 3 Sections: Extruded Forend, Machined Grip Frame with Vertical Grip, Forged and Machined Removable Buttstock Overall Length: 48" Weight: 12.3 lbs Finish: Hard Anodized Aluminum, Manganese Phosphated Steel Accuracy: 1" MOA Included with Rifle: 10 Minute Sight Base, 5 Round Magazine, Bi-pod Adapter, Owner's Manual, Limited Lifetime Warranty, Black Case