What will my rifle weigh? Posted on October 25, 2017November 9, 2017 by admin by admin The MGA Ultra-Light rifle can be custom built as light as 4-3/4 lbs. Most calibers will weight between 4-3/4 lbs. and 5-3/4 lbs. depending on the caliber and barrel length. Post navigation What is the finish on the metal?What is the cost if I supply the action?