GHK Colt M4A1 14.5 Inch DD RIS II GBB Airsoft V2 ( Batch - NOV 2023 )

2023 latest version of receiver & hop-up system

Update of the authorized COLT engraving receiver.
Optimized surface treatment of the main body.
Version 2 CNC machine bolt carrier with new bolt lock system
M4A1 Daniel Defense RIS II models added.
Colt and Daniel Defense authorized by the original