5 replies to this topic

[NerfFreak]

Well, I finally managed to get a homemade spring gun to actually work, and here it is.




The plunger tube is built almost exactly after Boltsniper's GNS. I made modifications to the lower reciever though, as I didn't have the right materials to make the fire control group Bolt used. I just used a clothespin trigger. Works wonderfully.
Also, before anyone makes a comment about it, the gun is not finished. I'm most likely going to remove the duct tape and epoxy everything together. It'd look and possibly function better. Also, I may add a stock to the gun, to make it look like some mutated SMG, and have the plunger be cocked via a handle on top of the stock, like a Famas.

That's about it for now. If you want details on design, make sure you have Boltsniper's GNS paint template open, to see what I'm talking about.

P.S. - What kind of O-ring did Bolt use? I tried 17's and 18's but they just didn't seem to fit right.

[Nonsense Man]

What kind of ranges does it get?

[SHADOW HUNTER ALPHA]

#18 O-rings have worked for me on my shotgun (As in the fit is perfect. I still can't fire the damn thing...). If the plunger chamber is 1" PVC, then the 18s will work fine. You may just need to cut a deeper groove if the plunger won't fit into the chamber with the O-ring on, or wrap some e-tape in the groove if it is not airtight or close to airtight. Other than that, great work. I hope to see the finished piece soon. I would use screws, though (#6 pan-head screws for sheet metal work on bolt-esque guns), just in case you want to take it apart for cleaning, upgrading, or repairs.

[NerfFreak]

It get's about the ranges of an unmodded NF. Not bad for a first homemade, but still, it can be improved.

For my seal, its basically a lubricated #17 O-ring, wrapped with duct tape until a tight fit was achieved, then lubricated again. It works fairly well, too.

I'll definetely look into using screws S.H.A. It would probably make the gun look nicer too.

[zaphodB]

I would move away from duct tape. When it gets old, it gets tacky, in both meanings of the word: it looks bad, and it's sticky.

[SHADOW HUNTER ALPHA]

Also, duct tape is terrible for seals. Sure, it may hold on the outside of pipes, but the criss-crossed fibers will make it extremely difficult for your plunger to obtain a good seal. Use e-tape inside the groove, and then roll the O-ring over that.