This is the MDT AICS Long Action 5-round magazine in .30-06 Springfield.

This AICS-pattern magazine features a high-strength, nitride steel body for maximum durability. Plus, it has been finished inside and out with Cerakote Elite for corrosion resistance and friction reduction.  

Specifications

• The standard length long action magazine in an MDT Chassis is 3.715″ unless otherwise noted in the description stating CIP or 3.85 for the longer magazine well