WTK Poly-Choke Super - Uninstall & Install?

[Azrial 1,091]

I have an old Mossberg barrel that I wish to save the "Poly-Choke Super" off the front of for use on my Saiga 12. I also wish to save the barrel which I will shorten to 18" and return to my friend for use on his Mossberg.

 

I would assume that it is silver soldered on. How do you usually remove these? I understand the theory, I have just never done it.

 

Any tips by those with experience would be greatly appreciated!

[vjor 2]

Brother, if you going to cut the barrel down on the shotgun to 18 inches, cut the barrel

with the choke in place, now you have the piece of barrel with the choke install.

 

Well I dont know if the choke have been done with high temp silver solder or

low temp silver solder, as if the shotgun is old I have seen ribs and other stuff

done in low temp silver solder on shotguns. As the shotguns dont get as hot as

rifles, but you never know it can be high temp silver solder.

 

Any way, I will use a oxy acetylene rig, as you can control the heat

better than any other torches, get a small tip on the rig do not use

a rose butt, you dont want to burn the choke at all.

 

Take any part of the choke that can come unscrew of it, the must you can take off

if you can take off any the better, install the choke on vice as you want to use the

vice as heat sink on the choke part , not the part of the barrel, now that the

part is hold on the vice and the vice is use to hold the choke and as a heat sink

heat the barrel all around, you are going to transfer heat from the piece of barrel

until the silver solder goes liquid and the barrel comes off the choke.

 

Use players to pulls nice and easy on the barrel, try to heat it

all around on the barrel part until gets about 600 degrees

the barrel will be still look black or the color of the barrel is

when is cool or normal temp, if that dont work keep applying

heat on the barrel part until comes off, One thing

if is high temp silver solder you may have to heat the

barrel part until it looks cherry hot as high temp silver solder can go

from 1000 to 1400 degrees.

 

I don't think the choke will be high temp silver solder but you never know

remember any solder work in capillary action that means

that at certain temp the solder will flow between the parts

is not like welding were you melting the metals to be join together

as one, that means don't heat the choke part or you can fubar it

that is why I say heat the barrel part if you toast it no matters

as you going to discard it.

 

I say before dont heat the choke even when you can a little bet

but remember if you have to heat the choke that the choke itself

may not be as thick metal as the barrel and it can

melt parts of it that are tin leaving it useless to you.

 

 

 

Good luck.

[Azrial 1,091]

Hey Vjor,

Thanks for taking the time to give me such a detailed answer! I could not find the Poly-Choke Super Model during a websearch last night, that and the built in sight bead makes me think that this choke is OEM (Factory Installed) on the Mossberg. It is a super clean job and I see no tell-tail silver leakage that is common to gun shop installs. Therefore, I am afraid I am wagering it to be High Temp solder.

 

I have ever considered cutting it off and boring the rear to size to slip fit on the Saiga. I intend to cut the S12 so that the installed choke is 18.25", so I will be silver soldiering it back on.

 

I would not think that this little bit of shortening of the barrel will necessitate a 4th gas port, but then again that is another problem.

 

Thanks so much for your help!

[vjor 2]

No problem broter, look at your PM.

[Azrial 1,091]

Thanks! - I am reading it now!