Primary Arms 5x ACSS Gen 2 Prism Scope Review Ammoland Inc. Posted on The Primary Arms PLX 5x Prism Scope is available in both black and FDE. IMG Jim Grant U.S.A. -(AmmoLand.com)- When it comes to combat optics, there is a misconception that shooters need to spend big money to get a quality scope. This is partially fueled by the legendary durability of Trijicon ACOGs that normally run around $1,000 since they were among the first combat scopes to gain widespread use among civilian shooters. And while offerings from Trijicon is very nice, they’re often outside the financial means of many shooters.