- Pre-fabricated defence structure built of steel.
- Single-man operation
- Designed to allow top part of turret to rotate through 360 degrees for all round field of fire.
- 199 Turrets ordered and built.
- 64 allotted to 2 Corps.
- 116 allotted to 11 Corps.
- Designed to be used for all types of light weapons: Bren, Lewis, Boys, Hotchkiss & Browning