The M26 has been in development at the U.S. Army's Soldier Battle Lab since the late 1990s. The idea was to provide soldiers with lightweight accessory weapons which could be mounted under the standard issue M16 rifle or M4 carbine.

The XM26 is a modular Accessory Shotgun System (MASS). It can be used as an under-barrel shotgun attachment. XM26 was first named as Lightweight Shotgun System (LSS). Now it is officially named as XM26 Modular Accessory Shotgun System (MASS).

Features:
- Comes with Aluminum Alloy Body Receiver
- Comes with Aluminum Outer Barrel and Polymer Flash Hider
- Comes with 5 Position Polymer Stock With Rubber Pad
- Comes with  Flip-up Front and Rear Sight
- Aluminum Cocking handle can be folded up and down
- Comes with Non Slip Special Textured Grip
- include one magazine can hold 5 shell
- include 2 gas shell  (Each shell can hold 3 rounds 6mm BB)

Specifications:
Length: 660mm / 810mm
Shooting Mode: Safety, Semi-auto
Power : Pump Action
Color: Black
Magazine Capacity: 5 gas shell
Material: Metal and Plastic
Bullet type: 6mm BB
Power (Muzzle Velocity):  280FPS (0.2g BB)
Manufacturer: PPS