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 Post subject: Modifying Remington 870 Express Tactical
PostPosted: Tue Oct 23, 2012 5:47 pm 
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This shotgun was purely built for home defense. This one is a little different mechanically than the regular express or express tactical. I looked everywhere for information on it and haven't really found much so I figured I would post my results here.

To start off this Remington 870 Express Tactical 12ga with an 18.5" barrel came from Wal-Mart. For $347.00 I couldn't help myself, I've been wanting a shotgun for a while now. I was pretty green when it came to shotguns at my time of purchase, all I knew was that I wanted an 870 with a shorter barrel.

The model number is 25077 from Remington. When searched on their website however, the firearm I purchased is not the one shown. The shotgun I purchased has a factory installed 2 round extension which brings the capacity to 6+1. The extension is integral and continuous (it cant be removed and is one solid piece) so you can't even tell its an extension to begin with. It just looks like they increased the length of the magazine tube at the factory to increase the capacity.

I could easily fit 6 rounds (2 3/4 slug) in the tube at first, almost 7. I then did some research and saw the flaws with the Express models and even the 870 in general. MIM extractors, plastic followers, weak magazine springs among them. You could really notice the weak magazine spring, when removing the last round from the magazine it came out at an alarmingly slow rate with alarmingly weak force. I do not want failures with this firearm.

I did my research, trying to find out what is best. Per Remington and their armorers, they recommend aluminum followers over stainless steel because the stainless steel ones can cause damage. Noted. I also did not want to lose a round in the magazine so I did not want a follower with a tail. I settled on the Brownells aluminum follower. I chose red, although they have them in green, black and orange as well. Product number 080-000-227WB for those interested. I got this product first and the fit was great, didn't snag on anything.
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(This is the stock picture from Brownells. Must be a pretty used one because the one I received had no scratches or anything)
I knew I needed a stronger magazine spring, and I settled on the Wolff extra power 6&7 shot magazine spring. SKU was 32712 for those interested. I didn't know if this would make me lose a round or not because of its extra length. There was no information on modifying this firearm I could find. Once installed it could still fit 6 (2 3/4 slug) rounds in the magazine tube, but BARELY! The spring power is MUCH stronger and thus improved the loading of the weapon greatly.
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The extractor I wanted to use was the OEM stainless steel one used in the 870P. Manufacturer part number F16176 for those interested. I ordered it, and when it arrived I realized I hadn't even checked to see if my extractor was in fact MIM. Everything I had read about the Express series was that they all came with MIM extractors. Come to find out mine wasn't MIM, it didn't have the line from the mold. Anyways I just took the one off that came with my firearm and kept it for an extra. Took the stainless steel one I got from Brownells and polished it to a mirror finish. Installed it and its perfect.
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Also placed an order for a new carrier dog spring. OEM part # F16966




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 Post subject: Re: Modifying Remington 870 Express Tactical
PostPosted: Wed Oct 24, 2012 2:47 pm 
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I had one of the RED followers and could not see it in low light. Red is one of the first colors to washout in the low light conditions.

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 Post subject: Re: Modifying Remington 870 Express Tactical
PostPosted: Wed Oct 24, 2012 3:16 pm 
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Seems like you did a pretty good job for your first shotgun. The only additional thing I suggest you do is to buy a Streamlight TLR-1 light and a mount. Streamlight makes a rail that goes on behind the magazine tube cap but it positioned the TLR-1 too close to my hand. My 870 has the 4 round magazine instead of the extended one piece tube like you have though. Your tube is longer therefor your magazine cap is further away and it just may work for you and work well. It is a backward facing rail that can be positioned at 3, 6 or 9. My TLR-1 has been on a couple different shotguns, my AR-15 for a while, my PT92 and now it's back on my go-to 870. It can be had for about $100 and the mount is $18. No ball detent but mine stayed in place despite that. For ease of installation and for not adding any steps to disassembly, it's worth a try.

http://www.amazon.com/New-Streamlight-R ... light+rail

I don't think the color of a follower matters as much as some people think. 1) It's not that hard to count your shots when your gun maxes out at 6+1 and 2) there is a huge difference in the feel of a follower on an empty magazine and a live shell. Tap the magazine opening with your thumb.

I cut my springs to 25" in my 7+1 magazines so if yours is any longer than that, chop a few inches off of it. If it's too long that's just going to make it harder to feed the tube.


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 Post subject: Re: Modifying Remington 870 Express Tactical
PostPosted: Wed Oct 24, 2012 4:07 pm 
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Misery556 wrote:
It's not that hard to count your shots when your gun maxes out at 6+1..."


I'd like to think that was true and while it's easy when the course of fire a slow and with a limited number of shots, most every one of my instructors moves beyond the comfortable and intentionally mixes it up and injects elements so that the gun is run empty which adds another element of stress to the exercise. Do you transition to your handgun if you have one? Can you find cover and reload the shotgun or should I just toss the shotgun at the bad guy and head to Chick-fil-A for a tasty sammie?


Misery556 wrote:
"I cut my springs to 25" in my 7+1 magazines so if yours is any longer than that, chop a few inches off of it. If it's too long that's just going to make it harder to feed the tube."


I think the Brownells video on spring length suggests that you clip it around 12" from the end of the magazine cap.


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 Post subject: Re: Modifying Remington 870 Express Tactical
PostPosted: Thu Oct 25, 2012 8:49 am 
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Buffering wrote:
Misery556 wrote:
It's not that hard to count your shots when your gun maxes out at 6+1..."


I'd like to think that was true and while it's easy when the course of fire a slow and with a limited number of shots, most every one of my instructors moves beyond the comfortable and intentionally mixes it up and injects elements so that the gun is run empty which adds another element of stress to the exercise. Do you transition to your handgun if you have one? Can you find cover and reload the shotgun or should I just toss the shotgun at the bad guy and head to Chick-fil-A for a tasty sammie?


Yeah. It's not as easy as you might think when you're shooting and moving and trying to make hits on stuff that's moving and keeping track of where the stuff is you don't want to hit.

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 Post subject: Modifying Remington 870 Express Tactical
PostPosted: Thu Oct 25, 2012 1:19 pm 
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Joined: Tue Oct 23, 2012 5:43 pm
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sjohnny wrote:
Buffering wrote:
Misery556 wrote:
It's not that hard to count your shots when your gun maxes out at 6+1..."


I'd like to think that was true and while it's easy when the course of fire a slow and with a limited number of shots, most every one of my instructors moves beyond the comfortable and intentionally mixes it up and injects elements so that the gun is run empty which adds another element of stress to the exercise. Do you transition to your handgun if you have one? Can you find cover and reload the shotgun or should I just toss the shotgun at the bad guy and head to Chick-fil-A for a tasty sammie?


Yeah. It's not as easy as you might think when you're shooting and moving and trying to make hits on stuff that's moving and keeping track of where the stuff is you don't want to hit.

That's where training and preparation come into play. I would take my AR over my scattergun in a gunfight any day. But for a home invasion a few well placed 00 tactical shells will do the job as I live in a small home. If stuff gets serious I can always grab my BCM


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 Post subject: Modifying Remington 870 Express Tactical
PostPosted: Thu Oct 25, 2012 6:31 pm 
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Joined: Tue Oct 23, 2012 5:43 pm
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Replaced the carrier dog spring with OEM part # F16966 and it made a really nice improvement to the feeding action of the weapon. Feels much better. I see why Remington did this to the 870P.


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 Post subject: Re: Modifying Remington 870 Express Tactical
PostPosted: Fri Oct 26, 2012 1:14 am 
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Joined: Sat Oct 06, 2012 12:10 am
Posts: 15
Clj94104 wrote:
The extension is integral and continuous (it cant be removed and is one solid piece) so you can't even tell its an extension to begin with. It just looks like they increased the length of the magazine tube at the factory to increase the capacity.


That's exactly what they did. It's not an extention but a longer mag tube. I have the same gun and love it. I'm glad they did what Mossberg and Winchester have been doing for so long now.




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