GHK Colt Licensed M4A1 SOPMOD Block II RISII GBBR (Black) 416 Metal flip up sights also

Metal flip up sights also make mounting an optic a breeze

it accepts AEG springs

Since the early mid 1800s SIG Sauer has been widely regarded as a purveyor of some of the best small arms on the planet

Integrated night vision mount for night vision devices

Durable carbine receiver with matte anodized finish and stamped G&G rollmarks

GHK Colt Licensed M4A1 SOPMOD Block II RISII GBBR (Black) 416 Metal flip up sights alsoComes with orange tip. Features Full metal upper and lower receiver with stamped Colt trademarks One piece metal barrel assembly CNC machined Daniel Defense licensed RIS II aluminum alloy handguard with laser etched trademarks allows for easy addition of any 20mm accessories Flat top receiver makes mounting optics or other accessories easy Adjustable CRANE style stock and polymer pistol grip CNC bolt carrier group with negative pressure blowback