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open muzzles Hawaii style

Thread Status: Hello , There was no answer in this thread for more than 60 days.
It can take a long time to get an up-to-date response or contact with relevant users.


New Member
Mar 21, 2003
Because of our usually clean water, many divers here like to modify their muzzles to open muzzle style. A gun with two bands can be used for fish holed up, or for those in the open or on the run. Here's my thoughts:

1. Cheaper to change bands.
2. Opens sight, easier to aim.
3. Allows adjustable power for both reef and open shots.
4. Smaller muzzle profile, easier to swing.
5. Can use fin/riffe type shafts.
6. No more shaft rattling.
7. Easier to load.
8. Less tangling.
9. Line guide for guns with reels (Higa Model)

1. Probably ruins warranty on new gun.
2. If overpowered, can risk trigger failure.
3. $50 more to spend.
4. slimmer muzzle may mean less stability.

First pic is of a Gene Higa muzzle for Rob Allen guns. Also made for Euro guns.


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This is the Gene Higa muzzle that has a line guide for guns with reels. Made of Delrin. This one machined for 2 16mm bans.


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This is a Wendall Ko muzzle on a Beuchat with two 9/16" bands.


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These are the muzzles side by side on a Rob Allen and Beuchat.


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Just thought of some other advantages:

1. Use of RA shafts or fin type shaft means no metal wishbones. Soft wishbones are much safer.
2. Soft wishbones are also quieter.
3. Replacing wishbones are cheap.
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