The B-14 HMR rifle features our integrated mini-chassis molded into the stock to give the rifle repeatable bedding and accuracy. It also supports a fully free-floated barrel to achieve optimal precision.Specifications: Weight: 9.5 lbs Overall Length: 40? Barrel Length: 20 Barrel Taper: No. 6 Muzzle: Precision threaded 5/8-24? (.450 Bushmaster: 11/1624) with knurled thread protector Magazine: AICS style detachable Mag Capacity: 5 round mag provided Stock: Bergara HMR Molded with mini-chassis Scope Mount: Fits Remington 700 bases with 6-48 screws Integrated QD flush cup sling mounts and swivel mounts Rear butt-stock: Adjustable cheek piece and length-of-pull (Length of pull adjustable with alternative screws available at shop.bergarausa.com) Full-length Integrated mini-chassis for repeatable bedding and supports fully free-floated barrel Caliber/Twist: .450 Bushmaster/1:24