This polymer grip module is a Sig Sauer factory original replacement. This grip module kit comes with the magazine release, magazine release spring, and magazine release stop installed in the grip module. This assembly is made to the same high factory specifications, materials, and standards as you have come to expect from Sig Sauer. Great for replacing a worn or damaged part or to keep as a spare, you can rely on genuine Sig Sauer parts to keep your pistol in top shooting shape. Product Specifications Brand: Sig Sauer Caliber: 9mm Finish / Color: Black Firearm Type: Pistol Material: Polymer Models Fit: Sig Sauer P365 Kit Includes: Black Grip Module Magazine Release (Installed) Magazine Release Spring (Installed) Magazine Release Stop (Installed) Note: It is recommended that all Sig Sauer parts be installed by a qualified and trained gunsmith.