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Questions & Answers
Will this fit p 229 magazines? Expert Answer

No, unfortunately it will not. Here's a link to the extension for the P229 mags.

https://www.opticsplanet.com/mec-gar-plus2-sig-p229-pro-polymer-adapter-set.html

by Kurt Colbourne, Gear Expert, August 17, 2021
Customer Reviews
Most Recent Reviews
Easy to install by PCrandal, Verified Owner, December 2, 2025
They fit well. Sadly the "Plus" is only 2, not 3.
Read 1 Review
Color:
Black
Fabric/Material:
Phosphate Steel, Polymer
Gun Make:
SIG Sauer
Gun Model:
SIG Sauer P228
Caliber:
9mm Luger
Magazine Capacity:
3 Round

Code: MEG-PME-MCGR16-F42140-SET-3RD

MPN: F42140-SET

UPC: 765595510180

List: $17.49Save 26%
$12.99

Product Info for Mec-Gar Plus3 Sig P228 Polymer Adapter Set

Replacement floorplate to increase the capacity on Mec-Gar Sig P228 9mm 15rd flush fitting magazines onlyimage

Specifications for Mec-Gar Plus3 Sig P228 Polymer Adapter Set:

Manufacturer: Mec-Gar
Color: Black
Fabric/Material: Phosphate Steel, Polymer
Gun Make: SIG Sauer
Gun Model: SIG Sauer P228
Caliber: 9mm Luger
Magazine Capacity: 3 Round

Features of Mec-Gar Plus3 Sig P228 Polymer Adapter Set

  • Polymer "Plus-3" magazine extender
  • Phosphate steel locking plate, heat-treated
  • Fits on the following Mec-Gar magazines:
  • MGP22815 B/N - Sig P228 9mm 15rd

Package Contents:

  • Mec-Gar Plus3 Sig P228 Polymer Adapter Set

Mec-Gar Plus3 Sig P228 Polymer Adapter Set Orderable Models

List of Orderable Models

  • Mec-Gar Plus3 Sig P228 Polymer Adapter Set, Black, F42140-SET , MPN: F42140-SET , UPC: 765595510180 , Code: MEG-PME-MCGR16-F42140-SET-3RD
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Last updated 2026-11-04 UTC.