[Tokyo Marui] M4 CQBR BLOCK1 Gas Blowback (Latest Batch / Released December 8, 2025)

Flexible and evolving, the new era of the M4 Shorty

The CQBR is a 10.3-inch short barrel M4 that replaces the upper receiver and barrel to adapt it for close-quarters combat (CQB) in confined spaces. There are three main versions of the CQBR, and the Block 1 model is now available in the gas blowback machine gun lineup!
By incorporating new mechanisms such as the Z system developed for the M4A1 MWS, it achieves both high durability and operational performance while pursuing realism in shape and texture.Furthermore, it has increased expandability for optional parts, making it easy to handle even in tight spaces.

Key Features

• Realizes powerful blowback

  It is equipped with a blowback engine that uses a large piston with a diameter of approximately 19 mm. 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 a crane-type stock that can be adjusted to six different 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 has mounting rails on all four sides (top, bottom, left, and right). It can accommodate a variety of optional parts that are compatible with the Picatinny standard (20mm width), including the standard KAC-type vertical foregrip. 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 LMT 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.