LazzurusMan

Up, down, left and right. Barrel should be central, and it's teflon taped so it doesn't move. I've not checked the barrel to see if it's perfectly clean and can't take it out to check where I'm testing it atm.

Sigs all back together, fired, got 275 on .28s, but I can't get the rounds to go straight. They're flying all over the place, even with a maple leaf bucking and omega nub. Anyone got any ideas what it could be?

All together, shimmed and tested. Doesn't screech, hits 31/32rps, and my FPS is entirely inconsistent. BUT IT LIVES.

I haven't got an awl, but I might try and gently scrape with a hobby knife or one of my tiny files. Glad (in some ways) to know I'm not the only one, and that I'm not crazy. Hopefully now I can sort it and get the Sig back together again.

Managed to get a video that shows what I mean a bit better. This is just the spur gear and bevel gear in the shell, no shims or anything. As you can see, the gears lock up with each other and it takes a bit of force to move them, more than should realistically be required. gears locking.mp4 gears locking.mp4 gears locking.mp4 gears locking.mp4

I've already short stroked the sector gear. I'll try adjusting the shimming, and I'll try them in a spare V2 gb I've got laying about too.

This is the other side, but the problem isn't with the sector gear, cause the sector and spur gears run perfectly together. It's only when I put the bevel gear in that I get issues.

This is the GB with no gears. Honestly the teeth on the spur and bevel gear don't seem to match/mesh very well.

Stick it in the nuprol, or buy another shell.

Will do in the morning after work.

Empty or with gears? Stupid question I know but I'm at work so brain not in gear 🤣

Not sure what you mean, but when I take the spur and bevel gears out and just mesh them together and turn them as if they are in the GB, I can see and feel at least one tight spot where the teeth don't match up well

Looks to be the teeth on the bevel gear and spur gear not meshing properly. I can actualy put the two together and hold one up, and the other will stay attached. I'm not sure if this is a production issue, or something I'm not getting right.

So my new shs 13.1 gearset arrived today, and Ive started to get eh gb shimmed and hopefully I'll have it alkl finished today. Or so I thought. Gears are shimmed to the GB shell, and shimmed with a very small gap between each gear, but when I test to see if the gears are meshing well they seem to spin fine then get stuck/caught on something. Appears to be a problem between the bevel and spur gear. Anyone had a problem like this before?

Wasn't sure where this belonged, but I wanted to thank everyone that has commented, messaged or in any way helped over the last 5 years when I've asked for it. Thanks to all of you I finally have my sig working! 345fps on .2s (I'll be using .28s) with about 27rps. I do still want to replace the gears as the bevel gear is pretty much ruined, but it all works! So againb, thank you all!!!

Cheers guys. I put it all back together just to test if my rewire had worked, and now that I know the new motor and electrics work, I can pick up a new gear set (tempted to go with 13.1 instead of 16.1) and hopefully I'll also find my buffer tube so I can have it back together and fixed.

Is this bad? This is what the bevel gear looked like when I took it out after my Sig ate it's last piston (won't name and shame, but a very reputable shop put in a half steel piston with polymer pickup and didn't seem to do any kind of aoe correction. When I opened the GB the read of the piston had nearly been ripped off). The Sig went through maybe half a days skirmish before it ate the piston, and these were apparently brand new gears out in. Should I replace the gear/gear set or is this normal wear?

Took off all the shims I put on, put a rubber washer on the piston head and screwed it tight (I suppose if that's a weak point it'll be cheaper than replacing a whole gear set etc) and my aoe is pretty much spot on. Thank you all, I'm one step closer to getting her on the field again! Now to solder the new wires and rebuild for testing.

The piston head has a bit of metal that protrudes into the piston where the thread for the bolt is. If I add more shims to it, the bit with the thread no longer goes into the piston. At that point I'd be relying entirely on the bolt to keep the piston head on, and be creating a weak point.

So I managed to get the piston head off and put a couple of washers on it, but the aoe still isn't right and there's no more space for washers on the piston. Anyone know any other tricks I can use? Picture of my current aoe, is it bad enough that I HAVE to correct it?

After on all, it's me again with ANOTHER question that'll hopefully help me to get my Sig sorted. It's been 5 years since I started working on it proper, I NEED to get it done. So I have a 15 tooth piston that I've used a Dremel on to reduce the size of two of the teeth for aoe, AND I removed two teeth on the pickup end to short stroke it. I need to replace it as I can't get the piston head off as I glued the thread and the head of the screw is now pretty chewed up, and just wondered, as I'm correcting for aoe and short stroking anyway, would it matter how many teether the rack on a new piston has?

So I found a video on youtube that apparently shows you how to restore old o rings. Heat up some cooking oil, not too hot, and put the oring in for a few minutes, then leave to cool. And I swear I'm not pulling any legs, it worked. My piston/cylinder/nozzle now have a pretty perfect seal. Like, I can't believe it actually worked.

To get a new nozzle means taking the old one somewhere can can scan and machine an exact replica, or buying a second hand king arms Sig 556 to pinch the nozzle out of it. They're unique to the gun. It's a V3 gb that sits far enough back from the hop unit that it has a very long nozzle to work properly. I should be able to find a replacement oring somewhere.

So checking the air seal in my Sig 556 before I clean it all ready for a re-shim to a new motor, I discovered that the air nozzle is barely sealing. I've removed the nozzle oring and it's had it. However, I don't have anything accurate enough to measure the oring, and I don't know where could possibly stock an oring this small that I can pick up easily. Anyone know where I should be looking and what I should be looking for?

The listings for em all day yellow so 🤷‍♂️