The Maxim Defense MDX 516 rifle in 5.56mm with a 16-inch barrel and black finish (brand part no. MXM-48560) is a full-length, non-NFA rifle in Maxim Defense’s MDX lineup, listed here despite the standard AR pistols shelf. Maxim Defense chambers the MDX 516 for 30 rounds with a rifle-length 16-inch barrel, giving shooters full-power 5.56 ballistics without any NFA registration required. Among AR-platform builds, this MDX 516 configuration favors shooters who want Maxim Defense’s compact-pattern design in a standard, rifle-length build.

Key Specifications

• This is a rifle-length build, not a pistol, despite its category placement.
• The chambering is 5.56mm / .223 Remington.
• The barrel measures 16 inches.
• That length meets the ATF’s 16-inch minimum for a standard, non-NFA rifle.
• The capacity is 30 rounds.
• The action is semi-automatic.
• The model is the MDM-516, part of Maxim Defense’s MDX lineup.
• The finish is black.
• Manufactured by Maxim Defense Industries.

Frequently Asked Questions

Is this listing actually a pistol? No, its 16-inch barrel and full configuration make it a standard rifle, not an AR pistol.

What caliber does the MDX 516 use? 5.56mm / .223 Remington.

Buy the Maxim Defense MDX 516 Rifle

A full-power, rifle-length 5.56 build from Maxim Defense is exactly what this MDX 516 delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.