Tag: UMOS

The UMOS – Universal Manual Operating System Pump Action AR-15 Kit

Posted July 11, 2014 in Companies, Other Gear & Gadgets by Nathan S with 65 Comments

Updated. Your eyes do not deceive you. That is not a free-float fore-end. It is indeed a pump-action AR-15, named the UMOS by Bentwood Gunsmithing of Nevada. The UMOS, or Universal Manual Operating System is a novel retrofit kit for AR-15s that utilizes [Read More…]