Finished this gun quite some time ago.
I wanted to build a gun that if I could only take "one" gun on a trip, then this could be used in all but the bluest of water... In saying that I have taken it out to some FADS with bottomless vis and shot some mahi with it.
125cm/49" (Mech to muzzle) euro - wood core/carbon wrapped
Single 19mm (3/4") rubber (I have twin 14mm (9/16th) on it now)
Riffe 165cm/7.1mm shaft
Neptonics reef mech, anchor, guide and handle frame.
Threaded inserts for mounting reel/Gopro
I made the handle side stocks out of zebrano laminated to red mahogany.
It's thin...
I hand wrapped 4 layers of a medium 2x2 twill on it, making it extremely stiff.
If I removed the rails holding the shaft then the body (with carbon) is roughly 20mm (just over 3/4") thick. With the rails it's 25mm (1") for 80% of the gun, 33mm at the each end and roughly 50mm wide.
Sinks with the shaft in, floats with it out.
I've been using this gun for most of the diving I do along the east coast here in Australia.
It's a little rough in some parts but overall I'm stoked with how it came out...