Choate Tool Rifle Stabilizer Black. It was developed by a renowned sniper instructor Major John Plaster and promised to dramatically improve rifle and handgun accuracy in all offhand shooting positions. Specifications for Choate Tool Rifle Stabilizer: Manufacturer: Choate Tool Country of Origin: USA Features of Choate Tool Rifle Stabilizer Rifle Stabilizer Package Contents: Choate Tool Rifle Stabilizer Choate Tool CMT-60-09-21: Rifle Stabilizer Black