XS Sights +5 Magazine Extension (M&P 2.0)

The XS Sights +5 Magazine Extension is the rare M&P 2.0 capacity part that covers both the Full Size and the Compact from a single SKU. It replaces the factory floorplate and adds five rounds while keeping the factory spring and follower, so there is no spring swap and no reliability guesswork. The body is machined from aircraft-grade aluminum and finished in Black Nitride, with an enhanced grip texture on the front strap.

XS publishes fitment on the 15-round and 18-round M&P 2.0 magazines in 9mm. That covers the M&P 2.0 Compact 15-round magazine, which becomes a 20-rounder, and the M&P 2.0 Full Size 18-round extended magazine, which becomes a 23-rounder. It does not fit the M&P Shield, Shield Plus, M&P22 Compact, M&P 380, or any original 1.0-generation magazines, which use a different floorplate geometry. XS does not list fitment for the 17-round Full Size factory magazine, which shares the body but uses a different floorplate, so treat that combination as unverified.