Jump to content

 

Sign in to follow this  
smokngun

870 dimple remover

Recommended Posts

There are a couple of ways to do it but the easiest way is to just drill them out.  The hole that is left will not interfere with any function and if you decide to operate in wet environment you have extra drain holes.

  • Like 2

Share this post


Link to post
Share on other sites
On 11/3/2017 at 8:33 AM, MP5_Rizzo said:

There are a couple of ways to do it but the easiest way is to just drill them out.  The hole that is left will not interfere with any function and if you decide to operate in wet environment you have extra drain holes.

I've done that and works fine. My current gun I actually used a Dremel and a sanding wheel and smoothed them down that way. Worked well and no holes. Here's another good way that's pretty easy. http://www.shotgunworld.com/bbs/viewtopic.php?t=53267

Quote
I posted this because I see almost every week in some forum someone asking about removing the dimples from 870 Express' magazine tube when they are installing magazine extensions. They have to be removed some way so the extension tube works. This is the way I prefer. Here is it step by step with pics.

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:


Image

Lubricate the inside of the tube where the dimples are:
Image

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 take it 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.
Image

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. 
Image
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.

Image

Image

 

 

 

Edited by Smith

Share this post


Link to post
Share on other sites

I've never dented mine but apparently it's a common issue that they make a tool for it, but it looks to be more expensive than a new tube.  Seen many references for using a socket driven through with a mallet to take it out enough to not have the shells bind up.

https://www.brownells.com/gunsmith-tools-supplies/shotgun-tools/straighteners-dent-raisers/magazine-tube-dent-raiser-prod25276.aspx

 

Share this post


Link to post
Share on other sites
13 minutes ago, Omega said:

I've never dented mine but apparently it's a common issue that they make a tool for it, but it looks to be more expensive than a new tube.  Seen many references for using a socket driven through with a mallet to take it out enough to not have the shells bind up.

https://www.brownells.com/gunsmith-tools-supplies/shotgun-tools/straighteners-dent-raisers/magazine-tube-dent-raiser-prod25276.aspx

 

That's what my link refers to with DIY pictures.

Share this post


Link to post
Share on other sites

Yes, the ones I've done have been done with a close-fitting socket.   It doesn't iron them out perfectly but a sanding wheel and polishing wheels on a rotary tool will take care of any high spots left.

 

I advise using oil or grease on the socket, and don't drive it in so far you can't get a grip on the socket to pull it back out (I use vise jaws).  
 

Share this post


Link to post
Share on other sites
1 hour ago, Smith said:

That's what my link refers to with DIY pictures.

I tried going to the link but SOCOM feels it's to dangerous for me to look at, so they blocked it. 

Share this post


Link to post
Share on other sites

What about something like a concrete anchor. The type you screw in and it expands the end. Some type of larger sleeve around it to fit the tube and equalize the pressure evenly. To reach deeper ones you just need a longer bolt or allthread to reach them.

Just a thought to toss out there to you guys.

 

CA3816-2T.gif

Share this post


Link to post
Share on other sites

Did it a dremel and no holes.   Works like a dream.  

Edited by smokngun

Share this post


Link to post
Share on other sites

Removing the dimples to use an extension on my 870 is the reason I first bought a dremel "gunsmithin" tool to start with.

Share this post


Link to post
Share on other sites

I updated my post with the actual thread and pictures of how to do with with a socket. Easy as pie.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  

The Fine Print

Tennessee Gun Owners (TNGunOwners.com) is the premier Community and Discussion Forum for gun owners, firearm enthusiasts, sportsmen and Second Amendment proponents in the state of Tennessee and surrounding region.
TNGunOwners.com (TGO) is a presentation of Enthusiast Productions. The TGO state flag logo and the TGO tri-hole "icon" logo are trademarks of Tennessee Gun Owners. The TGO logos and all content presented on this site may not be reproduced in any form without express written permission. The opinions expressed on TGO are those of their authors and do not necessarily reflect those of the site's owners or staff.
Before engaging in any transaction of goods or services on TGO, all parties involved must know and follow the local, state and Federal laws regarding those transactions. TGO makes no claims, guarantees or assurances regarding any such transactions.
×

Important Information

By using this site, you agree to the following.
Terms of Use | Privacy Policy | Guidelines