Check out the C4 Sights/ Apollo Max Review by Firearm Freedom! Watch Firearm Freedom review the C4 Sight and Apollo Max,
Check out the C4 Iron Sights Featured Watch the guys at Alabama Arsenal shoot and review the C4 sights and Mercury muzzl
Check out an upgraded iron sights experience with the Ultradyne C4 sights Watch OreGear shoot and review the Ultradyne C