Remington 870 Mag Extender Question

This is a discussion on Remington 870 Mag Extender Question within the Defensive Rifles & Shotgun Discussion forums, part of the Related Topics category; I have a Remington 870 Express Super Magnum 12 Ga. It holds 4 in the magazine. I purchased an Advanced Technology magazine extender. I unscrewed ...

Page 1 of 2 12 LastLast
Results 1 to 15 of 19

Thread: Remington 870 Mag Extender Question

  1. #1
    VIP Member Array NY27's Avatar
    Join Date
    Jul 2006
    Location
    NY
    Posts
    2,387

    Remington 870 Mag Extender Question

    I have a Remington 870 Express Super Magnum 12 Ga. It holds 4 in the magazine. I purchased an Advanced Technology magazine extender. I unscrewed the cap at the end of the forend figuring that it would be easy to get the old spring out and put the new one in.

    There is another cap underneath with a slot in it that I am not quite sure how to remove.

    Perhaps someone could talk me through the process. Thanks in advance, I'm sure that someone will be able to help me.
    Police Defensive Tactics, Firearms, Carbine Rifle and Taser Instructor
    Glock Armorer
    NRA Life Member
    It is better to have your gun and not need it, than to need it and not have it!
    You cannot choose the conditions for a gunfight, so train in all conditions!

  2. Remove Ads

  3. #2
    VIP Member Array Bud White's Avatar
    Join Date
    Dec 2004
    Location
    Away - Health Problems
    Posts
    17,353
    On my 870 you remove the first came and then the second one you carefully pry out and unleash the 20 foot long spring from hell..

    Not sure if the express is the same as the Std 870 but don't see why it wouldn't be

  4. #3
    Administrator
    Array SIXTO's Avatar
    Join Date
    Oct 2006
    Location
    Ohio
    Posts
    19,775
    Yeah, its the same. Its a little easier to get at if you slide the barrel off too.
    "Just blame Sixto"

  5. #4
    VIP Member Array Rob72's Avatar
    Join Date
    May 2005
    Location
    OK
    Posts
    3,468
    Its easier if you get (IIRC) a 1/2"or 3/8" bolt, and run it into the hole in the spring cap, then work it out gently. Do wear glasses/safety goggles, if you haven't had a mag tube spring out, before. Really not a big deal, but they can "leave a mark" if you aren't expecting it.

    Forgot to add: the 3-4" bolt keeps the spring from jumping out the side.

  6. #5
    Assistant Administrator
    Array P95Carry's Avatar
    Join Date
    Mar 2005
    Location
    South West PA
    Posts
    25,484
    That seems to have covered it. The springs are not actually that strong but yeah - they are long

    Added ext'n to mine without too much grief. Not shown in the pic is bracing clamp I fitted later - which nicely secures end of extension to barrel. Without it a sharp knock could cause problems.

    Good luck with yours - let us know if all goes well.


    Chris - P95
    NRA Certified Instructor & NRA Life Member.

    "To own a gun and assume that you are armed
    is like owning a piano and assuming that you are a musician!."


    http://www.rkba-2a.com/ - a portal for 2A links, articles and some videos.

  7. #6
    Member Array MoMike's Avatar
    Join Date
    Dec 2004
    Location
    Desloge, MO
    Posts
    256
    Just use a finger, push this cap down, and give it a quarter turn to the left. Then ease it back out.
    Cape Locum Et Fac Vestigium

  8. #7
    VIP Member Array Superhouse 15's Avatar
    Join Date
    Aug 2006
    Location
    Florida
    Posts
    3,055

    Or....

    Is it a solid, plastic cap with serrations around the edge? If it has a slot in the middle, it's a bit different than described. You must push it into the magazine and turn it to remove, IIRC. Use a flat-head screwdriver. Check to see if there are small dents in the side of the magazine, if so, it takes a little bit of work to fit the extended magazine, you must remove these little detents so the follower will pass. There should be groves in the serrated plastic plug that must pass these detents, thus the need to turn it. If you have a flat piece of stamped steel with a round hole in it, pry gently or run a bolt through it and pull it out like was posted above. Wear your goggles!

  9. #8
    Lead Moderator
    Array rocky's Avatar
    Join Date
    Jan 2005
    Location
    MI
    Posts
    15,953
    superhouse is right on. the small indents need to be filed down for shells to be able to pass to the extended mag. I found a dremel worked well, just take a bit of time.
    "In matters of style, swim with the current; in matters of principle, stand like a rock." Thomas Jefferson


    Nemo Me Impune Lacesset

  10. #9
    VIP Member Array NY27's Avatar
    Join Date
    Jul 2006
    Location
    NY
    Posts
    2,387
    Thanks for all the responses. I have been really busy between OT at work and getting oral surgery. When I get some free time I will give it an attempt. I'll let everyone know how it goes.
    Police Defensive Tactics, Firearms, Carbine Rifle and Taser Instructor
    Glock Armorer
    NRA Life Member
    It is better to have your gun and not need it, than to need it and not have it!
    You cannot choose the conditions for a gunfight, so train in all conditions!

  11. #10
    Senior Member Array Scot Van's Avatar
    Join Date
    Jun 2007
    Location
    Versailles, KY
    Posts
    830

    ATI question

    Quote Originally Posted by NY27 View Post
    I have a Remington 870 Express Super Magnum 12 Ga. It holds 4 in the magazine. I purchased an Advanced Technology magazine extender. I unscrewed the cap at the end of the forend figuring that it would be easy to get the old spring out and put the new one in.

    There is another cap underneath with a slot in it that I am not quite sure how to remove.

    Perhaps someone could talk me through the process. Thanks in advance, I'm sure that someone will be able to help me.
    Since I work for Advanced Technology, I'm probably the most qualified to help you out. Gimme' a call at my desk and I'd be happy to talk you through any install. Toll free
    866-472-8590, however, MoMike has the right idea. You should NOT need to use your Dremel.

  12. #11
    Distinguished Member Array SubNine's Avatar
    Join Date
    Jun 2006
    Location
    Anchorage Alaska
    Posts
    1,969
    I added a mag extension to my 870 Express Magnum. It had the little dimples in the mag tube. At first I was afraid to attempt it, but thought I'd give it a shot. My shotgun now holds 6+1 rounds!

    USMC rule # 23 of gunfighting: Be polite, be professional, but have a plan to kill everyone you meet.

    I am the God fearing, gun toting, flag waving conservative you were warned about!

  13. #12
    Assistant Administrator
    Array P95Carry's Avatar
    Join Date
    Mar 2005
    Location
    South West PA
    Posts
    25,484
    Just to show mine closer up, quick pic, and with the addition of the bracing clip.

    I bought the ext'n from another guy used so forget its origin right now, and maybe dr_cmg can remind me of the source where I got the bracing clip - also forgotten for now! Does reduce the vulnerability of the extra mag length.


    Chris - P95
    NRA Certified Instructor & NRA Life Member.

    "To own a gun and assume that you are armed
    is like owning a piano and assuming that you are a musician!."


    http://www.rkba-2a.com/ - a portal for 2A links, articles and some videos.

  14. #13
    Senior Member Array Scot Van's Avatar
    Join Date
    Jun 2007
    Location
    Versailles, KY
    Posts
    830
    Quote Originally Posted by spyderdude View Post
    I added a mag extension to my 870 Express Magnum. It had the little dimples in the mag tube. At first I was afraid to attempt it, but thought I'd give it a shot. My shotgun now holds 6+1 rounds!

    Unless I miss my guess, that is the Knoxx stock w/ the suppression system in it, right, Spydey? How do you like it? I've had more than a few officers tell me that they've had some issues w/ short stroking the gun because of all the movement in the stock. Has that ever been an issue for you, on duty or at the range?

    Some departments recommend racking the buttstock on the ground while holding the forend to clear the jam, but that not only seems rough on the gun, it isn't safe. Obviously, transitioning to sidearm is the common solution, but it is a shame to elimate the primary weapon if you don't have to. Any accessory that makes problems more likely can be a hazard, and definitely NOT for duty carry (which might be why Knoxx started offering this stock without the internal spring assembly).

    Just wondering...

  15. #14
    Distinguished Member Array SubNine's Avatar
    Join Date
    Jun 2006
    Location
    Anchorage Alaska
    Posts
    1,969
    I have no problems with my Knoxx Spec Ops stock. It's one of the best shotgun stocks on the market for reducing felt recoil, although I'm in no way recoil shy. I just hate waking up the next day with a sore shoulder.
    USMC rule # 23 of gunfighting: Be polite, be professional, but have a plan to kill everyone you meet.

    I am the God fearing, gun toting, flag waving conservative you were warned about!

  16. #15
    VIP Member
    Array dr_cmg's Avatar
    Join Date
    Feb 2006
    Location
    Alabama
    Posts
    10,808
    Quote Originally Posted by P95Carry View Post
    I bought the ext'n from another guy used so forget its origin right now, and maybe dr_cmg can remind me of the source where I got the bracing clip - also forgotten for now! Does reduce the vulnerability of the extra mag length.
    Chris, your wish is my command. TAC STAR BARREL MAGAZINE CLAMP 12GA MOSSBERG, REMINGTON, WINCHESTER
    George

    Two things are infinite: the universe and human stupidity; and I'm not sure about the universe. Albert Einstein

Page 1 of 2 12 LastLast

Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. Question on Remington 870.
    By automatic slim in forum Defensive Rifles & Shotgun Discussion
    Replies: 0
    Last Post: February 11th, 2011, 08:01 PM
  2. Remington 700 Question
    By BikerRN in forum General Firearm Discussion
    Replies: 12
    Last Post: December 23rd, 2010, 08:39 PM
  3. Remington Model 700 Question
    By chains1240 in forum General Firearm Discussion
    Replies: 13
    Last Post: November 13th, 2009, 09:46 PM
  4. Remington 870 Buttstock question
    By RetiredMajor in forum Defensive Rifles & Shotgun Discussion
    Replies: 3
    Last Post: January 2nd, 2009, 09:00 PM
  5. Grip Extender question
    By Lamonting in forum Defensive Carry Guns
    Replies: 8
    Last Post: August 24th, 2008, 07:20 PM

Search tags for this page

remington 870 express magazine extender
,
remington 870 express magnum 12 gauge mag extension
,
remington 870 express magnum magazine extender
,

remington 870 express super magnum magazine extension

,

remington 870 express super magnum tube extension

,

remington 870 extender

,

remington 870 magazine extender

,
remington 870 super mag extender
,
remington 870 super mag extension
,

remington 870 super mag magazine extension

,
remington 870 super mag tube extension
,
remington 870 super magnum magazine extension
Click on a term to search for related topics.