GHK Colt Licensed M4A1 SOPMOD Block II MK18 GBBR Handguards and Rail Accessories Also works with Holosun HS403B

Also works with Holosun HS403B red dot (does NOT work with 403R or 503R)

Gen 2 Design for better Air seal

Users should be alert that airsoft products are potentially dangerous which can cause serious injury and even death

Do not attempt to recharge non-rechargeable batteries

GHK Colt Licensed M4A1 SOPMOD Block II MK18 GBBR Handguards and Rail Accessories Also works with Holosun HS403BComes 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