Rob Allen Tuna Railgun


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Rob Allen Aluminium Tuna Railgun

The configuration

  • Double 16mm bands – Max firepower & range edition
  • Integrated rail for deadly accuracy
  • 7.5mm tri-cut stainless steel spear
  • Aviation grade aluminium barrel 1.45mm thick
  • Mechanism manufactured from glass reinforced nylon
  • Double wrapped heavy duty shooting mono – 2mm thick with 400lb breaking strain
  • Muzzle bungee with quick release clip
  • Low profile muzzle


The single and double banded aluminium spearguns are by far our most popular models.  If power, accuracy and durability are as important to you as they are to us, then here is your gun.  Durability wise we have a customer who is still shooting one these things that he bought all the way back in 1998!  Tread on them, fall on them, sling them in your boot after a hard day diving and they just keep on preforming season after season.

What makes this gun so popular however is not the battle tank-like ruggedness, but the pin point accuracy of the integrated rail that guides the spear when shot.  Perfectly in line with the firing mechanism and the low profile muzzle this railgun delivers one of the smoothest shooting systems the industry has seen.  No other gun manufacture comes close to the amount of world records these guns currently hold.  Don’t believe us?  Check out the IUSA and see for yourself 🙂

Combine this with double 16mm bands and you have an absolute powerhouse of a gun which is deadly accurate.

With the maximised power comes far increased range.  To ensure you can capitalise on that we always double wrap our twin band guns.  The heavy duty shooting mono is 2mm thick, has a breaking strain of 400lbs, secured with stainless seal crimps and connect via muzzle bungee.

This insanely powerful gun with the added range has become incredibly popular over the past couple of years.  It seems to be the number one choice for people not wanting to leave anything to chance.  It also has the added bonus off being equally at home abroad targeting big game as it is in the UK targeting bass.

The Sparid 80cm and the Tuna 90cm our best sellers for a reason, they blow the competition out of the water – it’s not even a fair contest.


What size speargun do you need? Click me to find out!

Spearfishing courses – New to spearfishing?  Then why not let one of our instructors train you up!

Additional information


Aluminium 60 – twin 16mm rubber, Aluminium 70 – twin 16mm rubber, Aluminium 80 – twin 16mm rubber, Aluminium 90 – twin 16mm rubber, Aluminium 100 – twin 16mm rubber, Aluminium 110 – twin 16mm rubber, Aluminium 120 – twin 16mm rubber, Aluminium 130 – twin 16mm rubber, Aluminium 140 – twin 16mm rubber, Aluminium 160 – twin 16mm rubber, Aluminium 170 – twin 16mm rubber


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