91/30 rear sight base removal

yeedamiah · 03-11-2008, 04:23 AM

so heres my issue.....i bought that imfamous "scope mount" that replaces the rear sight leaf and it just looks bad...so after some thought i took my scope rings of my marlin model 60 and realizied they were just tall enough to mount my scope on that dovetail under the rear sight. heres were my problem starts....one pin came out with one tap and the other pin has had eveything except an atom bomb used on it and it just wont budge. im looking for just about any ideas to get this pin out so please help rid me of this hell...thanks

SwedeSteve · 03-11-2008, 05:46 AM

I would apply heat carefully to the pin. Not the barrel! Sometimes they are in there good and tight. Another option, would be to drill it out if you have a drill press. Moose will come along and probably have a few ideas!

marion57 · 03-11-2008, 05:49 AM

If you have a computer supply store close you can buy some canned Freese that they use on PC boards and freese the pin then knock it out.. If you freese just the pin it will shrink it

SwedeSteve · 03-11-2008, 06:08 AM

Now THAT's a great idea!

EDIT: I had to come back to this one! Yeed, which pin is the one left in? The front?

yeedamiah · 03-13-2008, 04:23 AM

the pin closest to the bolt/butt end

SwedeSteve · 03-13-2008, 08:26 AM

OK, have you tried applying heat?

jmp8927 · 03-13-2008, 09:32 AM

I've never removed the rear sight, so my opinion is more subject to flaw, but theoretically would heating it up not make it tighter? When a substance absorbs more heat(heat=energy), the atoms in it begin to move more rapidly and the substance expands. In other words, the pin gets bigger and the hole get smaller. To me, the freeze idea makes a lot more sense. Freeze them both and the atoms in both the pin and the hole will slow down and the substance will contract, making the pin smaller and the hole bigger...

SwedeSteve · 03-13-2008, 09:58 AM

If the materials are the same then they will expand/contract at the same rate and you will have no change basically. Sometimes heating the pin area helps if there was any soldering done.

Also, are you tapping the pin left to right?

BaserRonin · 03-13-2008, 11:03 AM

Heat is effective to break lock-tight or dried grease/oil loose. If it is a pure tolerance issue I would try contracting the metal by sticking it in the freezer.
Usually if a pin is that hard to knock out there is something else going on though

R5CYA · 03-13-2008, 11:56 AM

there is always the option of using one of darrels scout mounts. they look like the best thing out there to avoid what you're going through. cost as much as my m44 though. 69.95 shipped i think. i think i might get one myself soon.
this one's for a m39

here's a link
Darrell's Scout Mount Forum - Hunting - ParallaxBill's Curio & Relic and Military Surplus Firearms Forums - Message Board - Yuku

SwedeSteve · 03-13-2008, 12:08 PM

If you are looking for a a scout mount, I think his is the best built one.

yeedamiah · 03-25-2008, 11:59 PM

ive got a mount already i just figured it would look nicer with the scope directly on that dovetail. thanks for all the ideas, i think ill start with the freezeing and go from there. thanks again -mike

Mike82 · 03-26-2008, 11:32 AM

one thing before u decide to use the marlin's rings....the dovetail is a 3/8", it's only as long as the base, and you cannot use the standard-rise scope rings....you must get the ones that have the 1/8"-1/4" rise, which gives a peep hole between scope and dovetail. Reason i say that is, I got the standard rise rings, and when i mounted my 2-7x 32mm scope, the rear lens housing rests against top of receiver, and will not zoom out any from 2x....cuz the top of receiver is on a slight rise, so you need around 1/4" higher rise to clear top of receiver. That's my 2cents....it may be different on yours, but i have serious doubts that standard rise rings will work, unless u get maybe a fixed zoom scope.

03-11-2008, 04:23 AM	#1
yeedamiah Registered User Join Date: Mar 2008 Location: wa Posts: 6	91/30 rear sight base removal so heres my issue.....i bought that imfamous "scope mount" that replaces the rear sight leaf and it just looks bad...so after some thought i took my scope rings of my marlin model 60 and realizied they were just tall enough to mount my scope on that dovetail under the rear sight. heres were my problem starts....one pin came out with one tap and the other pin has had eveything except an atom bomb used on it and it just wont budge. im looking for just about any ideas to get this pin out so please help rid me of this hell...thanks

03-11-2008, 05:46 AM	#2
SwedeSteve Thor's Hammer Join Date: Feb 2007 Location: Alaska Posts: 10,372 Images: 1	I would apply heat carefully to the pin. Not the barrel! Sometimes they are in there good and tight. Another option, would be to drill it out if you have a drill press. Moose will come along and probably have a few ideas! __________________ Thank God we don't get as much Government as we pay for! -Will Rogers

03-11-2008, 05:49 AM	#3
marion57 Senior Member Join Date: Dec 2007 Location: Missouri Posts: 2,882	If you have a computer supply store close you can buy some canned Freese that they use on PC boards and freese the pin then knock it out.. If you freese just the pin it will shrink it __________________ You can have my gun when you pry it from my cold dead fingers!(Charlton Heston)

03-11-2008, 06:08 AM	#4
SwedeSteve Thor's Hammer Join Date: Feb 2007 Location: Alaska Posts: 10,372 Images: 1	Now THAT's a great idea! EDIT: I had to come back to this one! Yeed, which pin is the one left in? The front? __________________ Thank God we don't get as much Government as we pay for! -Will Rogers Last edited by SwedeSteve; 03-11-2008 at 06:31 AM.

03-13-2008, 08:26 AM	#6
SwedeSteve Thor's Hammer Join Date: Feb 2007 Location: Alaska Posts: 10,372 Images: 1	OK, have you tried applying heat? __________________ Thank God we don't get as much Government as we pay for! -Will Rogers

03-13-2008, 04:23 AM	#5
yeedamiah Registered User Join Date: Mar 2008 Location: wa Posts: 6	the pin closest to the bolt/butt end

03-13-2008, 09:32 AM	#7
jmp8927 Senior Member Join Date: Nov 2007 Location: Walterboro, SC Posts: 1,141 Images: 17	I've never removed the rear sight, so my opinion is more subject to flaw, but theoretically would heating it up not make it tighter? When a substance absorbs more heat(heat=energy), the atoms in it begin to move more rapidly and the substance expands. In other words, the pin gets bigger and the hole get smaller. To me, the freeze idea makes a lot more sense. Freeze them both and the atoms in both the pin and the hole will slow down and the substance will contract, making the pin smaller and the hole bigger... __________________ Doing the unexpected makes the unexpected the expected and thus the expected becomes the unexpected.

03-13-2008, 09:58 AM	#8
SwedeSteve Thor's Hammer Join Date: Feb 2007 Location: Alaska Posts: 10,372 Images: 1	If the materials are the same then they will expand/contract at the same rate and you will have no change basically. Sometimes heating the pin area helps if there was any soldering done. Also, are you tapping the pin left to right? __________________ Thank God we don't get as much Government as we pay for! -Will Rogers Last edited by SwedeSteve; 03-13-2008 at 10:00 AM.

03-13-2008, 11:03 AM	#9
BaserRonin Senior Member Join Date: Feb 2008 Location: In a Dark Cubicle Posts: 371	Heat is effective to break lock-tight or dried grease/oil loose. If it is a pure tolerance issue I would try contracting the metal by sticking it in the freezer. Usually if a pin is that hard to knock out there is something else going on though __________________ "It is useless for the sheep to pass resolutions in favour of vegetarianism" ~ R. W. Inge

03-13-2008, 11:56 AM	#10
R5CYA Senior Member Join Date: Feb 2008 Location: San Bruno, Republic of Kalifornia Posts: 638	there is always the option of using one of darrels scout mounts. they look like the best thing out there to avoid what you're going through. cost as much as my m44 though. 69.95 shipped i think. i think i might get one myself soon. this one's for a m39 here's a link Darrell's Scout Mount Forum - Hunting - ParallaxBill's Curio & Relic and Military Surplus Firearms Forums - Message Board - Yuku Last edited by R5CYA; 03-13-2008 at 11:58 AM. Reason: Automerged Doublepost

03-13-2008, 12:08 PM	#11
SwedeSteve Thor's Hammer Join Date: Feb 2007 Location: Alaska Posts: 10,372 Images: 1	If you are looking for a a scout mount, I think his is the best built one. __________________ Thank God we don't get as much Government as we pay for! -Will Rogers

03-25-2008, 11:59 PM	#12
yeedamiah Registered User Join Date: Mar 2008 Location: wa Posts: 6	ive got a mount already i just figured it would look nicer with the scope directly on that dovetail. thanks for all the ideas, i think ill start with the freezeing and go from there. thanks again -mike

03-26-2008, 11:32 AM	#13
Mike82 Senior Member Join Date: Feb 2008 Location: Vicksburg, Mississippi USA Posts: 1,027 Images: 7	one thing before u decide to use the marlin's rings....the dovetail is a 3/8", it's only as long as the base, and you cannot use the standard-rise scope rings....you must get the ones that have the 1/8"-1/4" rise, which gives a peep hole between scope and dovetail. Reason i say that is, I got the standard rise rings, and when i mounted my 2-7x 32mm scope, the rear lens housing rests against top of receiver, and will not zoom out any from 2x....cuz the top of receiver is on a slight rise, so you need around 1/4" higher rise to clear top of receiver. That's my 2cents....it may be different on yours, but i have serious doubts that standard rise rings will work, unless u get maybe a fixed zoom scope. __________________ No Trespassing! Violators Will Be Shot! Survivors Will Be Shot Again!