MasterPiece Arms 20-Round 5.7x28mm Magazine for the Defender

MasterPiece Arms builds this factory spare magazine (part no. MPA5770) for the Defender, its 5.7x28mm pistol, holding 20 rounds of the flat-shooting, low-recoil cartridge in a black polymer body. As a direct factory-fit magazine, it gives Defender owners a genuine replacement or spare without adapting a magazine built for another platform. The 5.7x28mm cartridge’s high magazine capacity and mild recoil make the Defender a popular choice for range days and home defense alike, and keeping a spare magazine on hand means less downtime between strings of fire. For MasterPiece Arms Defender owners, this handgun magazine is a straightforward way to add capacity on hand.

Key Specifications

• Chambered in 5.7x28mm, matching the Defender’s factory caliber.
• Holds 20 rounds, the Defender’s standard high-capacity magazine size.
• Fits the MasterPiece Arms Defender pistol as a factory-spec magazine.
• Built from black polymer for a lightweight, corrosion-proof body.

Frequently Asked Questions

What pistol does this magazine fit? It’s built specifically for the MasterPiece Arms Defender in 5.7x28mm.

Why choose 5.7x28mm for a range or defense pistol? It’s a flat-shooting, low-recoil cartridge that pairs well with high-capacity magazines like this 20-round option.

Buy the MasterPiece Arms 20-Round 5.7x28mm Magazine for the Defender

A factory spare keeps a Defender topped off between range sessions. Order it from our Lubbock, Texas gun shop for fast, insured shipping.