If you are looking for a magazine for your Sig Sauer P228/229 Pistol, choose the magazine manufacturer that is the most trusted in the industry. All Mec-Gar magazines are made in Italy with the most sophisticated technologies and best materials. Since 1965 Mec-Gar has been a world leader in the production of magazines for the largest firearm manufacturers and militaries in the world. Fits Sig Sauer P229 in 9mm. Will not fit in older P229 pistols with the narrow, flat-sided magazine.