The Rob Allen Open Muzzle 25 mm is a speargun muzzle designed for railguns with an internal barrel diameter compatible with its 25 mm spigot. Its open design gives a clear line of sight along the shaft for aiming. It is moulded from glass-reinforced nylon, and the shooting line can be routed on either the left or right side, depending on your preference.
Key features
- Open design for a clear line of sight along the shaft
- Spigot outer diameter of 25 mm
- Moulded from glass-reinforced nylon
- Shooting line can be routed on the left or right
Specifications
- Type: open muzzle
- Spigot outer diameter: 25 mm
- Material: glass-reinforced nylon
- Line routing: left or right side
How to use and care
Check the internal diameter of your railgun barrel against the 25 mm spigot before ordering. Fit the muzzle and route the line to the side that suits you. Rinse the muzzle in fresh water after each dive and check it for cracks.
FAQ
Which barrels does it fit?
Railguns with an internal barrel diameter compatible with its 25 mm spigot.
Can I choose which side the line runs on?
Yes, the line can be routed on either the left or right side.
What is it made from?
Glass-reinforced nylon.








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