This Primary Arms rifle scope is part of the SLx optics line. SLx optics have built a reputation for innovation, reliability, and value. All SLx optics undergo rigorous field-testing during development to best serve you in any environment. The SLx 3x Micro Magnifier is an exciting approach at red dot magnifiers, combining high-clarity 3x magnification with a miniaturized body. This new optic is part of Primary Arms' SLx line. SLx optics built Primary Arms Optics' reputation for innovation, reliability, and value. All SLx optics undergo rigorous field-testing during development to best serve users in any environment.