6.03mm Tightbore inner barrel
Pre-upgraded version 2 gearbox
High density polymer construction
If you love the standard issue US Army M4A1 carbine, this should suit you! The Delta Armory DA-C03 CHARLIE™ M4A1 RAS AEG is styled after the M4A1 as it is issued to the US Army, featuring a RAS style quad 20mm railed handguard, M4A1 barrel profile with M203 cutout and the iconic AR-15 triangular front sight, along with some thoughtful modern ergonomic enhancements to improve handling. 
On the outside, Delta has added a gunfighter mod.3 style ergonomic pistol grip and the awesome Delta Armory battery stock and enhanced receiver, complete with gripping texture on the magazine well and a built-in enlarged trigger guard. As a replica of the Delta Armory CHARLIE™ line, the DA-C03 is constructed primarily from high density polymer with alloy trim parts to provide manageable weight and maintain peak agility in game. 
On the inside, the DA-C03 is kitted out with a tightbore inner barrel, a rotary HOP-up unit, and a pre-upgraded gearbox featuring an SHS tappet plate and piston, 7mm bushings and a quick change spring guide. Needless to say, this platform is superb value considering its features and is the perfect AEG for a new skirmisher who wants a cost-effective primary without any performance compromises!