Prometheus Straight Trigger SIGMA for Marui M4 Next Generation Electric Airsoft Sniper Innovative Hop-Up Thumb Dial located

Innovative Hop-Up Thumb Dial located inside the gun (can see after dissemble the slide)

and as an HK patent handguard stove base

The most striking changes compared to its previous versions as well as to market available AR platforms include an improved and tool-less gas regulator for suppressor use

Not Include Battery

Retractable Buttstock

Prometheus Straight Trigger SIGMA for Marui M4 Next Generation Electric Airsoft Sniper Innovative Hop-Up Thumb Dial locatedPrometheus Straight Trigger SIGMA for Marui M4 Next Generation Design for Upgrade the Origianl Trigger This will make altering triggers on AEGs much simpler than before Suitable For Tokyo Marui M4 Series Next Generation Electric Gun AEG Rifle