way overpriced but great design i like the fan idea and i think if it was a lower price than i might consiter buying it but i would also like to know what materiles were used in this gun. Composed of 32 machined parts, 26 are unique. Most are made of T6061 Aluminum, some stainless and the rest PVC....

Moonbogg, I gotta think you did not constrain the PTFE well enough. The stuff is close to inert and will withstand a lot of pressure but it has very poor mechanical strength. I often see it in square cut or o ring form placed in a tight groove, the lip of the vessel then entraps the seal in the groo...

Not to be a party pooper for anyone but Moonbogg is gonna be selling the cobra venom and the cobra viper (I think that is what the name is) kits for 400 or so dollars(THIS IS AN ESTIMATE), full aluminum construction :) with hybrid capabilities 8) :P Boom, True I am biased towards USG ... I am USGF ...

Looks great. Could be more camo with This stuff maybe. Or powder coat or black annodized. TL, Mike sent out quite a few for black anodizing. They were done up with bright dip so they are rather shiny. On the next batch, I would opt for a mat black, sand blasted black or powder coated satin black. W...

Wow amazing dude! That is some massive recoil and like people said they seem to be very stable in flight! I've seen other advanced spudgun videos on youtube and many of them had trouble going threw a tv screen at POINT BLANK... you did it at like 20 yards? :P HOLY nice job man... You made a beast o...

jackssmirkingrevenge wrote:If only you could achieve that rate of fire on target in real time...

JSR, there has been talk of a fully automatic GB gun. Pneumatic of course. Time is NOT permitting a lot of pet projects right now.

USGF

Shot with 520 and UHMW compound rounds. Round penetrated same depth as arrow shot from 65 lb compound bow. LOL.. Be careful.. The mods are lurking.. In total there are 14 users online :: 3 Registered, 1 Hidden and 10 Guests Tech, Mods may be lurking but Sponsor did NOT cross the line. If we/ he mes...

how many shots do you think the center drilled pucks will last It will depend on the target. Using carpet or wood as a backstop I think you could re-use all day. Usually the failure point is the tail. Any plans for additional bore sizes?? Yes. The 1.7 was nice because no modification to tail needed...

Update, the 2-1/2 UHMWHDPE round stock is too big to fit 2-1/2 inch SDR21 160 PSI PVC Pipe. I just tried it. This does mean it is big enough to machine down to test rounds that fit like a glove. :D Tech, our large 21" lathe has a 3.5 inch through bore. That material will go through and be machined ...

Do you think you could make a round for a 2 1/2 SDR sch 21 barrel? SNIP I measured the can and it came out to be a little over 65mm and Wikipedia agreed. I don't know the exact diameter since I was just using 2x4s and a plastic ruler, so it might have a larger diameter than the 2.5 inch stock you h...

Do you think you could make a round for a 2 1/2 SDR sch 21 barrel? SNIP I measured the can and it came out to be a little over 65mm and Wikipedia agreed. I don't know the exact diameter since I was just using 2x4s and a plastic ruler, so it might have a larger diameter than the 2.5 inch stock you h...

daccel, that's what we're talking about. Sometimes you wonder if advise is falling on deaf ears. Obviously not. Gents like you make the effort worth it.

USGF

Groove deep enough? check! Many calipers won't measure large diameters because the opening throat isn't deep enough. Digital with a pair of machinists calipers are a winning combination. Also, remember to use the depth measuring feature of a digital caliper to simply measure the depth. Once you hav...

The 4 inch piston on the previous page has an excellent o ring and groove. Awsome job on that 4 inch 3 inch porting monster. :salute: Tech, Thanks. We did relax the ID of the groove so the piston moves very freely. We use gland specs such as these. http://www.engineersedge.com/general_engineering/o...

I made a 3" port, 4" piston for Grock the other day. One of many possibilities.



Thread

http://www.spudfiles.com/forums/4-inch- ... 18112.html

USGF