[Tokyo Marui] M4A1 MWS Gas Blowback (Latest Lot/Released November 27, 2025)

The M4 Carbine Enhancement Program has created the definitive modern US military firearm.

The highly expandable "M4A1 MWS" is now available in gas blowback, equipped with a RAS (Rail Adapter System) and compatible with a variety of optional parts!
The dedicated blowback engine houses the largest cylinder in the series, measuring 19mm in diameter, generating unprecedentedly powerful recoil shock. Equipped with new mechanisms for increased durability, including the Z-System, this ultimate gas blowback model combines Tokyo Marui's signature accuracy and high operational performance with a pursuit of realistic shape and texture.

Key Features

• Realizes powerful blowback

  It features a new blowback engine with a large piston measuring approximately 19mm in diameter. The bolt operates in conjunction with the firing, allowing you to enjoy an unprecedentedly powerful recoil shock.

• High durability

  The new Z-system prevents wear and tear on the bolt catch, while the piston absorber and friction relief bolt roller reduce the strain on internal parts caused by bolt operation, and the barrel clamp mechanism prevents loosening due to recoil and keeps the barrel centered at all times improve durability against strong recoil shock.

• Realistic moving gimmick

  It faithfully reproduces the same functions as the real thing, such as loading the first bullet by operating the charging handle, operating the bolt catch after opening the bolt and changing the magazine, and an enhanced stock that can be adjusted to six lengths.It also allows for field stripping (normal disassembly for maintenance) in a manner similar to the real thing.

• Equipped with metal RAS

  The handguard is equipped with a RAS (Rail Adapter System) that features mounting rails on all four sides. It can accommodate various optional parts that are compatible with the Picatinny standard (20mm width), such as flashlights and foregrips. The heat shield inside the RAS is also reproduced.

• Mil-spec paint Cerakote

  The upper/lower frame and bolts are coated with Cerakote, a durable and abrasion-resistant coating, giving them a texture that is just like the real thing.

• Adjustable front/rear sights

  The front sight can be adjusted up and down using the included adjustment tool, and the rear sight can be precisely adjusted up and down and left and right using the dials.

• Compatible with various muzzle options

  By removing the muzzle compensator, you can attach a muzzle option with a 14mm reverse thread, such as a silencer.

• Aluminum die-cast magazine

  The die-cast aluminum magazine holds 35 rounds and reproduces the weight of a fully loaded magazine.