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swankforce
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Posted: 9/22/2004 9:33:52 AM EST
[Last Edit: 9/22/2004 4:46:38 PM EST by mike103]
Just picked up one of the 2-shot magazine extension tubes for my 1yr. old Remington 870. Only problem is the [new] follower will not push into the Remington mag tube, nor does it look like it will be able to function correctly as there are a pair of detents pushed into the mag tube at 0 and 180. Anyone else have this problem? Any quick fixes, or will the current mag tube have to be reworked/machined for me to be able to carry 2 more shells?
EPD1102
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Posted: 9/22/2004 9:51:21 AM EST
[Last Edit: 9/22/2004 9:51:46 AM EST by EPD1102]
This answer really needs to be tacked at the top because it gets asked every few weeks.

You will need to either drill out the detents and then smooth the holes with a dremel tool so that your follower moves freely through the tube

OR

You can use the dremel to just remove the raised portions of the detent.

There are people that prefer each method. I have drilled out quite a few on the department and then smoothed out the holes and re-blued everything without any problems.

Good luck whichever way you go.
We don't get paid to fight fair, we get paid to win.
swankforce
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Posted: 9/22/2004 11:46:15 AM EST
That’s what I thought. I took one look at it last night and was like, “damn, I guess this isn’t bolt-on.” I might cut them, but then I’ll need to re-finish the bare metal somehow. I don’t like the prospect of having to re-finish.

I’m most likely going to make a flaring tool here at work and press the detents out. I figure I can make a ring to fit over the mag tube also so I don’t oval out the tube.

Thanks though===== -
SHIPSNIPE1
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Posted: 9/24/2004 11:12:57 AM EST
Depending on how much of a perfectionist you are, here is another method.
There are specific tools also available that are made for smoothing out tubes without any grinding or drilling. Check with someone who repairs musical instruments (brass) locally. They should either have a hydraulic tool or a set of stainless steel balls made to resize or smooth dents out of horns, saxes etc. This is a technique that has been used to straighten out many paintball marker barrels also.
swankforce
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Posted: 9/24/2004 1:09:05 PM EST
SHIPSNIPE1 -

Luckily Im handy with the dremel and have access to a machine shop - I now have the extension on like a glove.

Either way, i feel bad for the guy who buys this product - upon closer inspection of the package - i noticed "870" was handwritten on the label with a marker - as in - this tube will fit the 870, but you will need a gunsmith or specialty tools to install it
BHP9
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Posted: 10/2/2004 7:59:58 AM EST
The dimples aren't a problem. Just drill them out on a drillpress and using a 1/4" bit. Use the Dremel to cleanup the burrs inside the mag tube.

BHP9
gus
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Posted: 10/2/2004 8:07:18 AM EST

Originally Posted By swankforce:

Either way, i feel bad for the guy who buys this product - upon closer inspection of the package - i noticed "870" was handwritten on the label with a marker - as in - this tube will fit the 870, but you will need a gunsmith or specialty tools to install it



That tube WILL fit an 870. The problem is with the Express model, not the extension. Non-Express 870's don't have the dimples.
Were it not for the Brave, there would be no Land of the Free
FastSS
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Posted: 12/21/2004 12:52:17 AM EST
Yup, thats exactly what I did to mine... actually I used an air grinder and a carbide bur, but its the same sort of thing... feeds ten... easily =x
Big_Bear
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Posted: 12/29/2004 1:42:21 PM EST
I used a Craftsman socket, sorry, don't remember the size, but it fits perfectly inside the mag tube. Hammered it down the tube and backed it out with a ratchet, and it pretty much flattens the dimple. Then clean up the inside of the tube with a dremel tool and no dimple, and no hole drilled in your mag tube.
"Lauch up, for its yer last laugh!"
FastSS
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Posted: 12/29/2004 2:11:22 PM EST
I dont suggest the socket idea... mainly because one didnt take it down far enough, and the other got stuck and forced me to buy a whole new shotgun, I was pissed.
There is no such thing as too much power... at least not as far as firearms and cars go.
Some carry a 9mm, others a .40 or even a .45... so what if I prefer to carry .50ae? I mean seriously, what if a train tries to mug me?
dURRTy
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Posted: 2/24/2005 6:09:27 PM EST
[Last Edit: 3/9/2005 12:01:02 AM EST by dURRTy]
I just installed a 2 round extention on a new 870 I used a dremel and the small grinder wheel, a small fine sandpaper attachment. Once it was smoothed out I cleaned it with brake cleaner. and put a tiny spary of primer on it. Once I cleaned it took away most the paint I put FP10 on the follower and the tube, then I worked the action a few times cleaned and relubed once more. Very easy the first time. Works flawlessly
http://www.teamtoptank.com/DSCF0001.JPG.
http://www.teamtoptank.com/DSCF0002.JPG.
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http://www.teamtoptank.com/DSCF0008.jpg.
ms329
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Posted: 3/19/2005 4:54:45 AM EST
Dremel grind bit the dimples down. I had the same issue and it was a great solution.
bmyk
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Posted: 3/30/2005 7:15:59 AM EST
I used the drill press method, then deburred using Dremel tool. Finally smoothed everthing with fine grit emory cloth. I will test function today then re-blue area. The dimples exist right under the barrel band so I am not to worried about anything getting in the tube. This may be an issued if the shotgun is used extensively in dusty or wet areas. However, there are other places for dust and moisture to enter the mechanism. I dont think structural integrity is affected that much either. I will post more with a pic after function check today.
Thanks
Mike
FastSS
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Posted: 3/30/2005 11:45:36 AM EST
grind the dimples down from the inside, it doesnt even make a hole

never a problem on my 10 round tube
There is no such thing as too much power... at least not as far as firearms and cars go.
Some carry a 9mm, others a .40 or even a .45... so what if I prefer to carry .50ae? I mean seriously, what if a train tries to mug me?
bmyk
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Posted: 3/31/2005 4:35:27 PM EST
What did you use to blacken / re-blue the mag tube? I have heard people use the term "blue" but it appears Birchwood Casey makes bluing and aluminum black. I guess I coule just check it with a magnet.
Function fired shotgun today with new tube, worked fine. I even threaded the hole in the end of the tube to use my sling. Took my 12 year old daughter to range, first time firing a gun. She shot the Marlin .22 and the High Standard .22 pistol. She also fired my SA 1911 and loved it.
Thanks for letting me go on. What a great day.
R/
Mike
Wetterman
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Posted: 7/2/2005 3:46:00 PM EST
Spray matt black and that's it. It isn't visible since the barrel loop is around the dimples. Cheap and easy.
Wetterman
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Posted: 7/26/2005 8:52:24 AM EST
[Last Edit: 2/26/2008 2:07:35 PM EST by Wetterman]
To remove the dimples from an Express mag tube you need these:
-hammer,
-socket from you socket wrench set thats outside diameter is 7/8",
-some lubricant (CLP or engine oil or anything),
-1/4" punch or bigger


Follow the instructions of your owners manual to remove the barrel and magazine spring:




Lubricate the inside of the tube where the dimples are:


Punch the socket with the hammer carefully into the tube. Note! Don't let it get too deep 'cause it's really hard to get it out of there. Punch it in and takeit out a couple of times and you'll notice after every time it's moving easier. You might have to use pliers to get the socket out the first time.


When you have flattened the dimples as much as you can with the socket,
Leave the socket inside the tube right where the dimples are/were. Take the 1/4"punch and the hammer and tap the sharp edges of the dimples flat.


At the end, take the mag follower and move it back and forward to see there really is nothing on its way.

I recommend to get the old style magazine spring retainer if you don't install extension but it's not necessary.











1IV
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Posted: 7/26/2005 9:01:10 AM EST
Just get a sanding drum, and a dremmel. Put it on it's highest rpm, and sand the tits off the trum. It usualy does not even penetrate the outside if you are gentle. Also do a little ata time to avoid heat buildup. and stop when you think you are close to done. you will probably BE done at that point. Then test and enjoy.
"Suppot the arts... Buy some"

Gary Russell 2003
Wetterman
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Posted: 7/26/2005 10:05:16 AM EST
If you do like I did you don't have to paint it or anything and you'll get it nice and smooth outside. And.. It's damn easy to do.
ms329
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Posted: 9/28/2005 3:52:31 PM EST
Dremmel with grinding bit. Paint eposed metal with high heat paint after.
StealthyBlagga
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Posted: 9/28/2005 4:03:33 PM EST
[Last Edit: 9/28/2005 4:04:05 PM EST by StealthyBlagga]
Drill out the dimples with the smallest feasible bit. Polish off any internal burrs. Dab on some cold blue if you are anal (mine were left in the white, and haven't rusted in 10 years, nor is the bare metal visible). The resultant holes are hidden/protected under the extension threads anyway, and are too small to cause any feeding problem, so long as they are properly deburred.

Anything else is unnecessary hassle.
Wetterman
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Posted: 9/29/2005 12:34:01 PM EST
The drilling and painting and bluing is a waste of time. Been there..done that...
terrydavis
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Posted: 9/29/2005 10:37:07 PM EST
I like to use a magazine tube dent remover and a brass punch. The dent remover is tapered for easy insertion and has enough length to work with. The brass punch raises the dent without marring the finish. Brass marks are easily removed. I use this method at gunshow when I sell a magazine extention and it only takes minutes.
762minigun2
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Posted: 11/4/2005 3:00:19 AM EST
dremel the sucker. I have done five in this manner
556newman
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Posted: 2/18/2006 10:59:13 PM EST
If I'm not going to operate on my shotgun
and I don't want to spend the $$'s to take it to a 'smith.
Won't a pocket full of shells do the same thing??

The way I see it (may be wrong) It takes two hands to operate an 870 -- functioning the pump or feeding shells into the mag -- the other hand on the trigger shooting down the lawye -- er... I mean the birds.

I think I'll take '4+1', a pocket full of shells, and a ready pistol in the back pocket as opposed to a modified 870 that is "supposed to function" with a higher cap. mag. A bird hunt is one thing but when it REALLY matters I'll toss that EMPTY 870 and run w/ my .45...
Clint50
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Posted: 3/14/2006 9:58:50 PM EST

That tube WILL fit an 870. The problem is with the Express model, not the extension. Non-Express 870's don't have the dimples.


I just installed a Choate extension on my 870 Magnum SP. Is this shotgun considered part of the Express family? The reason I ask is that my SP had the dimples and I had to dremel them out.
Clint
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