Hi,
Does any body know what brand might be, and how can I remove the front sight seen on the picture file that I'm attaching to this post?
The blade Lyman, but the base....I don't know. It looks like those british heat-shrinkable band sight, but I can't recall the brand name. I might have to take it to a machine shop to cut and crown the muzzle, I guess about half an inch, or may be less. No good gunsmith in hand.
KHAN

No idea of the make, but definitely older. It could be sweat soldered on, or there could be a set screw under the sight blade. If a set screw, then there is probably also some rust that will make it somewhat more difficult to remove. Heating hot enough to solder will either soften the solder if present, or expand the band enough to make is easier to remove, after loosening the set screw(?). If there is a screw it should be copletely removed, not just loosened, as it may be set into a hole in the barrel. Use either a lead ingot or piece of hardwood against the back of the ramp and strike that with your hammer to avoid damaging the ramp. After crowning you probably will need to slightly enlarge the band to get it to go far enough back onto the barrel. It can be replaced using almost any Loc-tite thread locker since there is quite a bit of area for it to bond to. Blue might not be the best choice, though.

No idea of the make, but definitely older. It could be sweat soldered on, or there could be a set screw under the sight blade. If a set screw, then there is probably also some rust that will make it somewhat more difficult to remove. Heating hot enough to solder will either soften the solder if present, or expand the band enough to make is easier to remove, after loosening the set screw(?). If there is a screw it should be copletely removed, not just loosened, as it may be set into a hole in the barrel. Use either a lead ingot or piece of hardwood against the back of the ramp and strike that with your hammer to avoid damaging the ramp. After crowning you probably will need to slightly enlarge the band to get it to go far enough back onto the barrel. It can be replaced using almost any Loc-tite thread locker since there is quite a bit of area for it to bond to. Blue might not be the best choice, though.
Ye I agree about the age. I estimate 50 years or more. I'll seek behind the blade, after marking the horizontal position with a punch or something, and then let's see what's next on it. I saw on the web those british band sights have a screw just where you suggest. So maybe that's the case.
Thanks for your help.
KHAN

If it isn't screwed on it's probably silver soldered on. Silver solder will come off with careful the use of a torch. If this is the case you will have to clean all of the solder off once the band sight is off and polish and reblue the end of the barrel.

I like oxpho blue from brownells for touchup.

I remenber seeing those a long time back. Its probably not soldered on.

If it isn't screwed on it's probably silver soldered on. Silver solder will come off with careful the use of a torch. If this is the case you will have to clean all of the solder off once the band sight is off and polish and reblue the end of the barrel.

I like oxpho blue from brownells for touchup.
A torch? Won't it change the barrel temper? I thougt heat would leave a barrel in useless condition. But I must be wrong. I need to know what kind of a torch may be used. If those for plumbing (propane/butane gas) or those used for refrigeration/car body works (acetylene).
Now, after heating the sight and the barrel until sight is removed, what else must be done? Do I have to cool the barrel in water? or just leave there it until it cools by wind disipation. Please, I'm almost illiterate in the use of heat onto gun barrels.
KHAN

A simple propane torch will work to soften the solder.
Loosening the solder doesn't require enough heat to damage the barrel. A simple way to judge if the sight is hot enough is to fold a scrap of typeing paper several times over to make it stiff, apply a small amount of heat and then touch the paper to it. If the paper discolors it 'ought to be hot enough, reapply a little more heat to bring it back up and then attempt to remove the band.
To remove the leftover solder, you can heat it to a liquid appearnce and then gently wipe it off with a wad of #OOOO steel wool.

Ye I agree about the age. I estimate 50 years or more. I'll seek behind the blade, after marking the horizontal position with a punch or something, and then let's see what's next on it. I saw on the web those british band sights have a screw just where you suggest. So maybe that's the case.
Thanks for your help.
KHAN

Yes, I marked the horizontal with a punch, and then I slided out the sight blade using a brass punch and a hammer. There it was a screw that fits inside a hole on top of the barrel. I just loosen the screw, and then hit the sight base using an aluminum piece and a hammer. First hits were on both sides of the base, then I hit on the dovetail cut towards the end of the barrel, obviously. It came out easily. Now it's time to cut that od barrel front and crown it again. Still, no trace about the make of the sight base. Thanks,
KHAN

You could have counterbored the muzzle for a new crown! Leaving sight intact.

A torch? Won't it change the barrel temper? I thougt heat would leave a barrel in useless condition. But I must be wrong. I need to know what kind of a torch may be used. If those for plumbing (propane/butane gas) or those used for refrigeration/car body works (acetylene).
Now, after heating the sight and the barrel until sight is removed, what else must be done? Do I have to cool the barrel in water? or just leave there it until it cools by wind disipation. Please, I'm almost illiterate in the use of heat onto gun barrels.
KHAN

Lots of sight bases soldered on along with most double shotguns having the barrels silver soldered togather. Heat at the temperatures used won't hurt a barrel.

Sure glad you got it off. Check with Brownell's thay have piloted crowning tools that make this an easy job.

Lots of sight bases soldered on along with most double shotguns having the barrels silver soldered togather. Heat at the temperatures used won't hurt a barrel.

Sure glad you got it off. Check with Brownell's thay have piloted crowning tools that make this an easy job.
Well. I 've got a lathe crowning bit from them. I can't do that job by hand, because muzzle has to be cut about 1/2", or maybe 3/8" at least. So I 'll take it to a machine shop. Besides, piloted hand crowning tools are expensive, and I trust more machines to cut and crown, than hand tools.
Thanks for your comments,
KHAN

You could have counterbored the muzzle for a new crown! Leaving sight intact.
No, my friend. I could not, because the sight base was located 1/8" behind the muzzle, and in order to correct the real problem the barrel must be cut at the front end at least 3/8". Crowning just is the second part of te job ti finish it. The thing is that because of muzzle wear as a consequence of its age, the rifle lost accuracy. The muzzle doesn´t pass the "practical test" of putting a catridge against the muzzle to check it's diameter. If I do that the bullet will go inside, along with part of the case, which is never acceptable. Caliper muzzle diameter readings are obviously unacceptable too. Thanks for your comments,
KHAN

Lots of sight bases soldered on along with most double shotguns having the barrels silver soldered togather. Heat at the temperatures used won't hurt a barrel.

Sure glad you got it off. Check with Brownell's thay have piloted crowning tools that make this an easy job.

I will do lathe barrel crowning because I need to cut the barrel as well. Now, what type of crown do you recommend for a 0.624" outer diameter muzzle with 0.263 bore? I 've seen three types I can tell: Round, step, and eleven degree crowns. Current crown is round, but with a 1/16" depth 45 degree cone at the bore exit.
KHAN