ATLAS BIPOD GEN2 CANT AND LOC (CAL) TALL BIPODS BT69-NC Gen. 2 CAL Atlas Bipod: Tall with No Clamp The CAL (Cant And Loc) Atlas Bipods were developed for shooters that do not desire the Panning feature. The BT69-NC Atlas Bipod "No Clamp" model has a two hole pattern of 1.100" with the holes being 10/32 threads. It requires any 17S size lever style mount to include the ADM-170-S, ARMS 17S, TRAMP from Badger Ordnance, LT271 or any ARCA dovetail mount with the same hole pattern. The BT69-NC will also mount directly to our BT19 AI Spigot or BT70 M-LOKA(R) Adapter. It is comprised of 6061-T6 aluminum, except the inner Mfg: Accu-Shot