Specna Arms - M4 MK18 in Chaos Grey Viper Tactical Elite Carrier(coyote) it has rails for which

it has rails for which you can attach whatever you want to attach to it

This HK416A5 from Umarex is a fully licensed gas blow back replica of the newest version of the HK416

Adjustable straps on velcro panel for precise rifle placement

Others are 165mm long

which accept MOLLE  pouches

Specna Arms - M4 MK18 in Chaos Grey Viper Tactical Elite Carrier(coyote) it has rails for whichBRAND SPECNA ARMS Rifle MK18 carbine. Color CHAOS GREY. Shooting Mode: safe single shot Auto Electrical operation. Weight 2580gr. Body full metal. Adjustable length 700 785mm. Battery place in stock. SOPMOD stock type crane. Aluminum mk18 RIS. Flip up sight. Left 14mm threaded. BOLT CATCH working. TECHNICAL FEATURES: Metal gear box. 8mm bearings bushing. Steel gears. Adjustable hop up. ENTER & CONVERT system. IN THE BOX: MK18 carbine rifle CHAOS GREY.