M4 RAS is the M4A1 Carbine which equips with the RAS (Rail Accessory System) handguard , as the standard equipment for the M4 / CQBR used by US Special Force based on the SOPMOD block I (Special Operations Peculiar Modification) developed by USSOCOM.
The Masterkey is an under-barrel door breaching shotgun system developed in 1980s. This project wants to provide assault rifle with a built-in breaching tool and let soldiers no need to carry an extra breaching shotgun on the battlefield. It consists of a Remington M870 shotgun mounted on a M16 or M4 assault rifle in an under-barrel configuration, like the M203 grenade launcher. Independent stock is needed when need to use the Masterkey as a stand alone weapon which can also used with the M203 grenade launcher as Masterkey cannot used independently.
The Masterkey is only a tested type modular weapon in US army, but it successfully inspired the M26 (called XM26 when testing) under-barrel shotgun attachment and chosen by US army as the new breaching tool.
14mm”+” Metal Flash Hider.
Comes with matel 14.5 inch outer barrel with fixed iron sight.
Comes with an air cocking Masterkey (with short barrel) attached on the outer barrel.
Comes with the upper part of the RAS Handguard. The lower part of the RAS is included in the package.
Metal Frame with clear “Skull Frong” Marking.
Standard 20mm rail on the upper frame for rail attachments.
Comes with 600m Flip up rear sight.
Constructed of 8mm Metal Bearing Gear Box.
Adjustable hopup system.
Comes with Standard handgrip in black.
Comes with LMT style buttstock which store up to 7.4V Lipo batteries inside the rear stock tube with normal t-plug.
Ready to go for 350 FPS (both M4 RAS and Masterkey) without modification.
Included 130 rounds M4 mid-cap magazine and 22 rds shotgun magazine.
** Please note that Battery and Charger are not included**
Length: 840mm, 925mm (Stock extended)
Barrel Length: 363mm (M4 RAS), 230mm (Masterkey)
Shooting Mode: Safety, Semi-Auto & Full-Auto (M4 RAS), Safety, Fire (Masterkey)
Weight (g): 5930 (with box)
System: 8mm Metal Bearing Gear Box (M4 RAS), Spring Pump action (Masterkey)
Battery: 7.4V Lipo Battery
Magazine Capacity: 130 rds (M4 RAS), 22 rds (Masterkey)
Material: Metal & ABS
Bullet type: 6mm BB
Power (Muzzle Velocity): 350 FPS (both M4 RAS and Masterkey)