1.5

Two Remington 700’s inside of the Accuracy International Chassis System. The one at the top is the 1.5, an update to the original 1.0 model. Second photo is of the 1.5 Version 2 which has updated panels that mimic the 2.0; the folding stock variant.

One of the major differences between the 1.5 and 1.5 Ver.2 (aside from aesthetics) is that the latter cannot use a rear monopod. It has a much more prominent swell at the bottom of the stock for the support hand.