MEC-GAR MAG BERETTA PX4 9MM 21RD AFC

Description

Mec-Gar has supplied OEM magazines to major firearm manufacturers since 1965, and this extended magazine for the Beretta PX4 is built to the same standard as those factory contracts. If you run a PX4 for home defense, competition, or carry and want more rounds on tap without switching pistols, this is the straightforward solution.

The tube is drawn from heat-treated carbon steel, which gives it the structural rigidity to handle the sustained spring tension of a higher-capacity stack without deforming over time. The spring itself is wound from high-tensile music wire, a material chosen for consistent force across the full range of travel — important because a spring that loses tension near the top of its stroke is a source of feed failures, not just slower last-round feeding. The high-impact polymer follower works in conjunction with the interlinked internal components to keep the stack aligned through the feed cycle.

The Anti-Friction coating does three things at once: it reduces the effort required to load rounds by hand, it lowers the friction that can cause a cartridge to hang up on the way into the chamber, and it provides a barrier against corrosion without adding meaningful thickness to the tube. The extended polymer floorplate gives your support hand something to grab when seating the magazine or stripping it during a reload. One compatibility note worth knowing before you buy: this magazine is not designed to work with funneled magazine guides, so if your PX4 has one installed, verify the guide’s geometry before ordering.