The Mec-Gar Sis Sauer P.229-1 9mm 17rd Extend Anti-Friction Mag is a high cap 17 round 9 mm magazine. It fits newer P .229 and P .229 E2 pistols with wider tapered P229-1 magazines. It will not fit in older P .229 pistols with narrow flat-sided magazines. The increased 17 round capacity features a Plus-2 adapter and interlinked internal components. It is only 0.625 inches longer than flush fit magazines. The redesigned tube improves functionality and is heat treated for strength. The anti-friction coating allows for easy loading and superior anti-corrosion properties.