I have the Samp;W Mamp;P 15 rifle and was wondering if I should oil the exterior of the rifle. The receiver material is 7075 T6 Aluminum and the finish is Hard Coat Black Anodized (specifications on website). Any advice or tips are welcome! Thanks!Aluminium does not rust. The anodized finish protects the aluminium from oxidization. So no, oiling the finish is not necessary.aluminum is different from steel, it does rust (oxidize) but once it does the oxidation protects it from further rust! unless freshly scratched or gouged, all aluminum surfaces are covered wit ha near-invisible layer of aluminum oxide (rust) that acts like a barrier against further corrosion. anodizing is a type of aluminum finish that strengthens the natural barrier of aluminum oxide to make it more acid resistant. no oiling is necessary to keep anodized finishes in good shape. the only stuff you have ot watch out for with aluminum is mercury. mercury will destroy aluminum beyond repair. but since the mercury bans about 20 years ago accidentally spills of mercury on your gun isn\'t very likely... mercuric corrosive primer soot will not damage your gun.As chris w said, aluminum doesn\'t rust and anodizing prevents corrosion. Have you considered simply reading the manual that comes with your rifle? The manual includes instructions for cleaning and care, and if you don\'t have one, you can download it from SW\'s website.Other related question