The BT20 Atlas Accuracy International Spigot (AAIS) Rail Set consists of three pieces of 1913 rail that can be attached to the BT19 AAIS on the bottom and both sides. This accommodates for a multitude of options including the mounting of any rail mounted Atlas Bipod.
Each rail is machined to Picatinny rail standards from 6061-T6 aluminum with Mil-Spec Type III Class 2 finish. Fasteners included. Available in black only.