B&T BT20B AAIS Bottom Rail

The BT20B is the same lower rail found in the BT20 kit. This product can be installed on the bottom of the BT19 model at the 6 o'clock position, allowing for the installation of a BT10 or BT10-LW17. This rail is 1.60" long and constructed from 6061 T6 anodized aluminum.