Airzone TetraStrikes (TRU rebrander of Buzzbee, toyquest, lanard and possibly other brands) have hit here in CA so I figured I'd snag one for the low price of 7.99. I'd like to start off and disclaim all of the crap I saw on previous threads of the Tetra strike about how the airtanks seemed slightly similar in size. Its more like a hornet tank in size but maybe 3/4ths the length of a hornet tank.
Materials needed:
file/sandpaper
glue of choice
Ls/recon/raider/longstrike/pieceofcrapclippedgun faux barrel
saw or pipe cutters
dremel
Heres the tetra strike, theres a orange ring that prevents you from opening the gun undeneath the pump, I took some pliers and wrenched to the left and the glue broke. the orange grip also might be glued on yours.

Open it up

told you the airtanks were small. also there is no tubing inside it, just this:

Now hack the barrels down to about a 1/2 and put 1 inch of faux barrel over it. glue it down. it will be a tight fit, but with some sanding it will work.

glue whatever barrel material inside the faux barrel and you are done. I choose 4 inches of my brand of PETG (I'm not going to sell it simply because there is already enough people who sell petg, even if its not the same size as mine)

done!
Some notes: my stock pump was broken, so I added a 2k pump and it takes 3 pumps till the 2k OPRV kicks in to get 4 50 foot shots. highly effective with 4 1/2inch length hotglue weighted shotty stefans in each barrel.
Ranges: mid 50's