The Atlas BT20 AAIS Rail set consists of three pieces of picatinny rail that can be attached to the AAIS BT19 on the bottom and both sides allowing for a multitude of options, including mounting of the BT10, and BT10-LW17 to the AAIS.

The rails are made from 6061T6 Aluminum with a type II hard coat anodize, and come complete with fasteners they are made in the USA.

Please note, one of the images in the product imagery gallery shows the rails fitted to the Adapter Accuracy International Spigot. This product contains only the three rails, and required fasteners. The Adapter Accuracy Internaional Spigot should be ordered separately.