The MadBull Gemtech "HALO" QD Barrel Extension is another quality barrel extension from Madbull. They received the license from Gemtech to replicate their famous HALO quick detach suppressor. This barrel extension fits over your standard birdcage flash hider to enhance the look of your M4/M16. It only takes a few seconds for the Madbull Gemtech HALO to go on and come off.
Length: 176mm (6.93")
External Diameter: 38mm (1.49")
Thread Type: None, This is a Quick Detach barrel extension You must have a standard M4/M16 Birdcage flash hider to use this product.
Recommended fit: Any AEG with a standard birdcage flash hider
Color: OD, Olive Drab
This barrel extension fits over the flash hider. It is one solid piece with absolutely no suppressive capability.