SEEKINS PRECISION IRMT-R AR-15 Billet Upper Receiver (0010900007)

Upgrade your rifle with the Seekins Precision's Integrated Rail Mounting. The IRMT technology uppers integrate the rail mounting points into the upper retaining the stiffness of a true monolithic upper while allowing the rails to be completely modular. This upper design is considerably thicker in the most critical area and will aid in squeezing all of the potential accuracy out of your rifle. Instead of a standard barrel nut Seekins Precision IRMT system uses an externally threaded, Titanium barrel nut with 1-1/8" wrench flats on it for simple installation. No special proprietary wrenches needed.