A growing presence for Theta Optics in airsoft and we get to learn more of the Theta Optics A1 Mini in this review by L'Antre Du Dingo. The brand has introduced of the RUGGED line, featuring the compact, low-profile A1 Mini collimator. Crafted from durable, CNC-machined aluminum, this collimator boasts shock resistance up to 800G, IPX7 water resistance, and anti-reflex, UV, anti-fog, and scratch-resistant glass.