CYMA CY-M015 LMT Tactical Rear Sight, Compatible with 20mm Rails, Full Metal Replica, Zero & Peep Switchable, Black

[Compatible Airsoft Guns] ■Compatible with all airsoft guns with a 20mm rail This is a CYMA LMT-type tactical rear sight replica. This is a classic rear sight for the M4/M16 series, a proven military sight also used on the "US SOCOM Mk18 Mod.0." While compact and lightweight rear sights have become mainstream in recent years, this rear sight's appealing features, such as its "old-school, rugged design" and "large dial that can be adjusted with bare hands," make it a perennial favorite among some users! Just like the real thing, it allows you to switch between up/down/left/right zeroing and peephole (eyehole) settings! The screw that secures it to the 20mm rail uses a thumb screw that can be turned with your fingers. The screw has a groove that allows you to tighten it further with a coin or similar tool.