The BT20-B Atlas Accuracy International Spigot Bottom Rail is the same rail found in the BT20, but consists of the bottom 1913 rail ONLY. It features two blind threaded 10/32 holes and center-to-center hole spacing of 1.100″

Machined to Picatinny rail standards from 6061-T6 aluminum with Mil-Spec Type III Class 2 finish. Available in black only. NO HARDWARE INCLUDED. 10-32 x 3/8″ Flathead Socket Screws available separately.

• Length: 1.60″
• Weight: 0.57 ounces

It was originally designed to attach to the bottom of the BT19 AAIS. Progression of various mounting options prompted some end users to adapt their Atlas Bipod while utilizing their existing quick detach lever on the “LW17” style of Atlas Bipods and/or the 2-Screw mount style of Atlas Bipods.

We found our BT20-B Bottom Rail to be the perfect solution to this request. By installing onto any clamp with matching center-to-center hole spacing of 1.100″, you are given a ready solution to adapt to your choice of attachment. See our BT20-B PLUS for compatible options we offer installed.