I just traded for a new m305 yesterday and am in the process of removing the brown death that's coating it. I don't know if I'm missing something but the gas piston seems very tight in the gas cylinder. The piston seems to be slightly rotated from it's ideal position inside. What the hell should I do here?
Stubborn gas piston new M305
- Thread starter Folklorestatus
- Start date
see if you can push a bore brush of suitable size into the open end of the piston to rotate it and then push and pull it out?
FYI, i've seen 2 newer 305/14's recently where either the piston was too big or the gas cylinder hole was to small and the piston would not at all fit thru the bottom opening without considerable force. After dissassembly they noticed the problem with their piston fitment, took about 10 min tryin to line it up and force it thru the bottom opening.
FYI, i've seen 2 newer 305/14's recently where either the piston was too big or the gas cylinder hole was to small and the piston would not at all fit thru the bottom opening without considerable force. After dissassembly they noticed the problem with their piston fitment, took about 10 min tryin to line it up and force it thru the bottom opening.
Get used to having a Norinco first and formost.
The piston should be dry as a bone once you have done your cleaning. Also, do as much reading on the platform as you can.
The piston creates a weak vacuum/pressure and should actually take about 1/2 second or so to move when tilting the gun back and forth.
Should be a nice pfffffffffffffftt.
The piston should be dry as a bone once you have done your cleaning. Also, do as much reading on the platform as you can.
The piston creates a weak vacuum/pressure and should actually take about 1/2 second or so to move when tilting the gun back and forth.
Should be a nice pfffffffffffffftt.
Kayser Sose
CGN Ultra frequent flyer
- Location
- Southern Van Isle
Tapping the piston out accurately (dont just wail on the thing, use a good drift punch or the like), done well damage shouldn't result from this technique.
To recap, with the gas plug out, the piston should be free to drop out. If it ain't, help it. Sorry to hear about the rust, better luck next time.
...maybe soak it down with WD40 as well? as mentioned earlier, you'll have to clean that out after.
To recap, with the gas plug out, the piston should be free to drop out. If it ain't, help it. Sorry to hear about the rust, better luck next time.
...maybe soak it down with WD40 as well? as mentioned earlier, you'll have to clean that out after.
I just installed a used usgi gas cylinder and piston on my Norinco, all looked good to the naked eye but the piston would not slide back and forth without a fair bit of force, sprayed some action cleaner in there, moved the piston back and forth until it would move freely the wiped out the gas cylinder with a bore mop and passed the tilt test with no problem. Don't force it if at all possible just spray the cleaner in and push the piston back and forth with a wooden dowel until it moves freely through the gas cylinder.
Rodney
Rodney
The one that comes with the rifle. You have to bend it a little, or use a .410 brush that should work.
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Sprayed some carb and choke cleaner down there and after a few minutes of sitting, the piston was ready to leave the cylinder. If anyone was waiting for this thread to be resolved, sorry it has taken me so long. I don't have my own garage so a visit to the old man's place was required for any volatile chemicals to be applied.
eaglesnester
CGN Ultra frequent flyer
Let it soak, use brake clean and anything else U can think of that is a solvent and let time be your friend. Do not force, bang, or pry, it must fall out on its own. U probably have may have some evaporated or hardened Chinese cosmoline which is not supposed to do that but for some reason has. submerge the whole thing in a pan of diesel or some such other for a while.
