I’ve owned several RSA’s over the years they have held up very well. True they are made of carbon composite & titanium vs aluminum but will take abuse. They were originally part of the German IdZ program. It has a few points over aimpoint . no POA shift when using a cowitness , solar backup and it’s extremely light. The AP is aluminum, has aftermarket support and is less complicated. They both are combat tested, both have battery life in the years and both are well made. Can’t go wrong with either.