Colonel Wasp 77 --- Standard 16mm barrel replacement mount (Shell cutting needed)
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Remove factory barrel and fit standard 16mm barrel. REQUIRES CUTTING SHELL.
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Jan 2025. You probably should not use this, there is a better way. You can clamp to the metal buts on the front of Wasp, like the official “dragon” BCAR does that was released by Colonel Wasp themselves.
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NOTE: REQUIRES CUTTING THE BLASTER SHELL
Remove factory barrel barrel and fit standard 16mm barrel.
It is a tight fit as I made a small tolerance error in the CAD, I have provided the STEP file if you need to adjust it. I just hit it.
How to remove Colonel Wasp 77 barrel
(1) Remove the 4 screws at the front of the blaster's plastic shell, not the ones holding the metal pieces on
(2) Prise apart the front SLIGHTLY
(3) Remove the metal crosspiece, and pull out the barrel.
(4) FILE the front of the plastic shell to 16mm diameter; it is cut smaller to fit the barrel notch.
(5) Replace barrel, re-install shell screws.
(6) Secure print via picatinny screws m3x30 bolt and nut, secure barrel via m3 bolt.
Performance Notes
From testing, 300mm barrels seem to work best. I don't know why. They still seems short to me. At 300mm, mine hits 75m/s (250 fps) on heavyweights with good accuracy. At 350mm, consistency of velocity started to drop (this might be the specific barrel's precison and I don't currently have a 400mm or spare 350mm). I am using the stock 2.2mm spring. (More aluminium is in the post from the PRC). Colonel Wasp himself has stated the blaster can hit 90 m/s (300 fps) but hasn't (yet) given the specs for barrel and spring. He also published a trigger and full auto fix, which you should consider.
DISCLAIMER: I believe the metal crosspiece is reinforcement for the plastic shell. You might want to file that down and put it back on. I have been using my Wasp 77 for some few hundred rounds now without it, and nothing has broken so far. I would stick more padding between the shell and the barrel mount, where CW put the black rubber tape.
Modifications and License
Remix and commercial use welcome under CC-BY-SA. Suggestions (1) address tolerance, (2) replace barrel screws with heatsets, (3) add a front sight post, (4) address padding between the mount and the shell, to take the spring force.
Amended instructions; added photo of screws to remove.