UTG 6" ITA Red/Green CQB T-dot Sight with Offset QD Mount | Leapers Leapers, Inc. - Hunting/Shooting, Sporting Goods and Security Gear
UTG ACCU-SYNC 2521R Dot Sight, Red 3.0 MOA Single Dot, for Mini ACOG Footprint | Leapers Leapers, Inc. - Hunting/Shooting, Sporting Goods and Security Gear
DOCTER Sight III instruction manual - Optics Trade Blog