Shotgun Magazine Extensions: My Thoughts

Joined
Oct 8, 2020
Messages
2,709
Disclaimer: The following are my thoughts and opinions only. I do not try to force them on anyone else, I just like to share my reasoning behind them. This is just to start a discussion and put some stuff out there, that's all.

I have a Remington 870 Police with 20” barrel that I keep for home and property defense. I played around with extended magazines but have since gone back to the standard 4-round factory tube magazine. I personally believe it’s got a few advantages that might not be apparent at first glance. Here is my shotgun:

912-F6-C29-46-D3-49-D0-8-AAC-CC889-B6-F1-BDF.jpg

First off, is 4+1 rounds of 12 gauge buckshot or slugs enough for personal defense? In my opinion, yes. Civilian defensive shotgun fights that require more than 1-3 shells are incredibly rare. Tom Givens posted an article on something to this affect a while back IIRC. Paul Harrell and others have echoed this over the years.

Numerous police departments issue and have issued 870s with 4-round factory magazines. With proper tactics such as shoot one/load one exercises, and single loading through the ejection port off a sidesaddle, they serve well.

The advantages of a stock 870 (4 round) tube:

1) It's as reliable and simple as it gets. No multi-junction extensions to ensure are fitted together properly, no barrel clamps or braces to change point of impact with slugs, just a straight tube to cleanly feed shells into the action. Also simplifies field stripping and cleaning.

2) Increased durability over extensions. I have read of extended mag tubes, especially those without a brace, breaking off at the threads. One alarming report regarded a police officer who responded to a bank robbery. He grabbed his 870 out of his cruiser, smacked the extension in the process, and his magazine tube came apart spraying shells everywhere. Not good. Also almost the entire magazine tube is protected from dents that can impede feeding vs the much greater exposed surface area of an extension.

3) Maneuverability is enhanced. For me, the difference in a stock tube vs an extended tube is dramatic when transitioning from targets and when holding up the shotgun for extended periods of time. A person may need to hold the shotgun unsupported on a door or live subject for quite a while. The standard 4 round tube keeps the balance of the gun between the hands, reducing fatigue. Those extensions put weight at the worst possible point on the gun, the end of the barrel.

4) One handed operation and reloading. Tying in with maneuverability benefits, ditching the extension can make it easier to manipulate objects such as cell phones or medical supplies with the off hand while still holding the gun with the strong hand. It also better allows the gun to be trained downrange during reloading from a sidesaddle or magazine pouch.

In the end, it doesn't matter how big and strong you are, the standard 4 shot tube makes it easier to handle the gun and you might not be the only person in the household who might need to use it at any given time. Research and past experience tell us the capacity is statistically more than enough for the vast majority of defensive scenarios. A backup gun, often in the form of a pistol or revolver, is always a good idea no matter what you weapon's magazine capacity. Also learning to reload from a sidesaddle or other on-gun ammunition storage system is very important. Keeping the gun topped off is a great skill with the tube-fed shotgun, no matter how many shells it will accept.

In addition to all of this, I have a shoulder injury in my support arm and by reducing the weight it has to manage I’m better off for it while I recover.

So that's my reasoning for keeping my house gun extension free. Just thought I'd point out some reasons for doing this that I think are often overlooked. Try it sometime, you might really like it!

-JCF
 
I was looking at a tube extension for my KS7 but ultimately decided that would completely undo it's design purpose to be short and easily maneuverable. Besides the extension makes it look ugly and it already holds 8 rounds of 2.7 shells (7+1).
 
I tried one and didn't like the balance. I don't even like a side saddle, but at least that puts the weight between the hands. For years I had a belt with loops made for shotshell hanging near the gun. I never actually needed it but could quickly sling it over a shoulder and carry it bandolier style. It finally wore out.

This

Amazon.com : Allen Company Shotgun Shell Belt For Hunting, Sporting Clays & Trap Shooting, Holds 25 Rounds, Heavy-Duty 2-inch Webbing (Fits Waists Up To 52 in),Black : Shotgun Ammo Belt : Sports & Outdoors

I replaced it with a belt pack and can also throw it over a shoulder with the pack on my chest. It has 2 zippered pockets. I keep 15 buckshot rounds in the main compartment and 10 rounds of slugs in the smaller one. In addition to the 4 in the magazine. Nothing in the chamber until needed.

Not my pack, but the same idea. Mine is smaller but worn the same way.

Amazon.com | Fanny Packs for Women & Men Unisex Waist Bag Pack with Headphone Jack and Zipper Adjustable Strap Black Fanny Pack for Outdoors & Gym (fanny pack). | Waist Packs

I also have a light attached to the barrel. I have lights on my HD handguns as well as 1 of my AR's.
 
You have to use common sense and select the right tool for the job.
If your main risk factor is a possible mass assault on your home by a drug crazed biker gang, or you're going through Fallujah with the Marines, a magazine extension might be a good idea.
For most ordinary home owners, a standard 4 shot tube is usually enough, and if you need more, buy one of the Remington 870's that has a one-piece longer magazine.

The best feature of the defense shotgun is it's adaptability. If your situation might require an extension you can install one, and if the situation changes, you can remove it.
 
I put a choate 2-shot extension on a Rem 870 18" barrel over 30 years ago. I love it. Works great for me. Shotguns are heavy anyway. Two extra shots make no difference in feel to me. The 18" barrel makes it handy. Six in the magazine and one in the chamber.

We don't know anymore what situation we may come across in this day and age. Statistics are all about looking backwards. If I looked at probability when I was an LEO many years ago, I would have never bothered with wearing body armor.

Nice 870 you have there by the way.
 
Last edited:
I put a two shot on an 870 myself and it is as long as I’d go.
I agree with you up to a point. Extensions work better on the “pre-detent” shotguns. A barrel band/extension device protects the longer ones but weight is a factor.
My 70 870 with two extra is sleek, light, and Carries no extras. No sleeve, no sidesaddle, no light. Pure unadulterated firepower. #4 buck. (Thanks, Capstick)
I do have a late Express I’m smoothing up that has a capacity of eight but it hasn’t proven itself reliable yet. More internal work needed on mag tube, chamber, and trigger.
 
I'll take a tube the same length/just short of the barrel and see no downsides except a few minutes more to clean the gun. I've used a Beretta 1301 Competition in 3-gun with a 24" barrel and an extension to get 12+1 which is several inches longer than the barrel with no issues and that includes dumping it in a barrel numerous times. I always use a barrel clamp which also provides a place for a light mount and a sling attachment point. I have never had a reliability problem. It is doing double duty now as my HD gun with a tube just short of the barrel and I see no downside. If it were an 18" barrel I would have a tube the same length as the barrel.
Capacity is king.
 
If my barrel is longer than my mag tube, the tube could be longer and the barrel could be shorter and I have a win/win situation.
 
This is the very reason I decided to buy a new RemArms 870 Tactical. The factory mag tube is extended at the factory to hold 6 rds. So you do not have that weak joint to deal with. I keep 3 slugs in a side saddle in case the right changes distance or tactics. I download by 1 and can switch to slugs with 1 inserted into the msg and rack and retrieve the BS round from the chamber. So far so good.

Steve
 
All I've ever wanted was a standard four shot tube, a bead sight, and an 18 to 20" barrel... For my purposes it's well balanced, quick pointing (when quickness might be life itself...), and that basic OObuck round when you're within 15 meters is a one shot fight ender -if you do your part. I used to emphasize to my crews that no matter what you were armed with - you still had to line them up and put them down in that once in a lifetime, dangerous close quarters moment. My opinion hasn't changed one bit and on any call that might involve weapons I did my best to have that basic riot gun in hand.

The only "extras" I've ever wanted on my shotgun (whether it was something I was issued or my own...) was a sling and an elastic butt cuff holding five extra rounds, one or two slugs instead of Buck.... Learn to use that weapon properly and you can become a very dangerous opponent for anyone foolish enough to try... I retired out of police work in 1995 and have never needed a shotgun since then - but it's always close by at home. I hope to live out my remaining years without needing it even once...
 
All I've ever wanted was a standard four shot tube, a bead sight, and an 18 to 20" barrel... For my purposes it's well balanced, quick pointing (when quickness might be life itself...), and that basic OObuck round when you're within 15 meters is a one shot fight ender -if you do your part. .... I hope to live out my remaining years without needing it even once...
^^^ I agree. I don't have your experience against 2-legged predators, but I have years of experience shooting (and hunting, albeit most of the hunting was long ago before I stopped killing animals that I didn't plan to eat), with all manner of firearms. I believe the short, maneuverable shotgun to be the most fearsome in a home invasion type of scenario. And I know for sure that were I the invader, I'd rather face pretty much anything other than a 12 gauge with buckshot in capable hands. My opinion matches the Germans' in WWI when they made a plea based upon Article 23(e) of the 1907 Hague Convention; it's just too brutal to face.
 
Last edited:
The elephant standing in the room is that if you have a 2-shell extension, you can still load it to only 4 if you prefer. The extension tube itself is very light and doesn't get in the way. My 2-shell extension is slightly shorter than the barrel. It looks good and gives me those two extra in the mag if I feel I need to load up. As in many cases it's one of those situations where I'd rather have and not need.

By the way, the shotgun America brought into WWI and the Germans protested under the Hague Convention was the Winchester 1897 "Trench Gun" with an extended magazine. The US military continued to use extended mags on newer models and brands of shotguns. The 1897 was used through Vietnam.

Win 1897.png
 
I'll take a tube the same length/just short of the barrel and see no downsides except a few minutes more to clean the gun. I've used a Beretta 1301 Competition in 3-gun with a 24" barrel and an extension to get 12+1 which is several inches longer than the barrel with no issues and that includes dumping it in a barrel numerous times. I always use a barrel clamp which also provides a place for a light mount and a sling attachment point. I have never had a reliability problem. It is doing double duty now as my HD gun with a tube just short of the barrel and I see no downside. If it were an 18" barrel I would have a tube the same length as the barrel.
Capacity is king.

+1

I run a Steoger M3K sent up the same, but run 9 loaded to stay within division. IF that's cumbersome I've never noticed it, and neither have the majority of guys shooting 3Gun. My HD shotgun (been replaced with an AR15) is a Benelli M1S90 with full extension for 7 +1 on board with it's 18.5" barrel. I've used it in a couple defensive shotgun classes and never had an issue. IF anything the extra weight up front helps mitigate the recoil.

The "quick pointing" is kind of funny once you realize that the guys running shotguns on multiple TGTs on a clock are mostly using extended tubes with as many rounds as they can cram in them. IF quick pointing provided an edge over capacity you'd see it in matches.
 
Sounds like a case of justifying what one has, rather than a pragmatic assessment of what would be preferable in a defensive confrontation.

I've had 4+1 shotguns and realized the limitation. I further realize the limitation of a 6+1 downloaded and left cruiser ready at 5+0. However, the second option is preferable to me for safety reasons as well as magazine spring preservation. (And yes, I've had tube mag springs fail due to being left fully loaded. It's not worth the risk to me.)
 
In my situation, I do have a couple very likely needs for more than 4rds. To serve this need, I have bought a few mag fed shotguns with 10rd mags to see how they would work. I have since dispersed all but one of them due to deformation of the shells. If you leave the mags loaded for very long, the top couple of shells deform unless they are slugs. Not much point in keeping them for SD or varmint work if you can't leave them loaded.
So, since I don't go duck hunting these days, I added a tube to my 870 Super Magnum to serve this purpose. It now holds 10rds and I have been very happy with it for my intended purpose, shells don't deform in a tube mag. Shot some skeet with it a few weeks ago just to check function.
As mentioned, it's probably better for most people to just use the stock mag and practice single rd feeding. But mine works well for my intended purpose.:cool:
 
Some folks are talking about 9 or 10 rounds in an extended magazine. Shucks! (and I don't mean shucks) I was talking about short barrels, like the 20" Police model, or my 18" HD model. My 18" 870 holds 6 in the magazine with the extension. It's compact and easy to maneuver with only 2 extra shells.

For "home and property defense" as the OP stipulated I wouldn't want anything longer than a 20" barrel. You can get an extension for 3 extra shells with that length, or 2 or 1. Whatever suits you. I'm happy with the short barrel I keep on it, but switching to the 20" slug barrel I have in the closet is easy enough and the mag extension doesn't make that anymore difficult.

For hunting with the slug barrel it's easy to remove the mag extension and put the original cap back on, making it 4 shells. That's what I like about the 870. You can switch out all kinds of barrels for different purposes. I keep mine configured for unwelcome intruders.
 
In Alaska you will encounter working 12 gauge SlugSlingers (field work in bear country) Govt (FWS/NPS/BLM/FS) utilize the police model 870 model with the 2 round extension for 6 rounds of 3" rifled slugs.
The police model has milled parts as opposed to centerd metal parts (extractor).
 
Last edited:
Shot Tom Given's shotgun class with a Winchester Defender with an 8 round standard tube. Most folks had more than 4 round guns. I guess Tom and the class didn't read that article. Tom never argues for limiting your ammo based on average stats, BTW. Recommended Flite Control and we patterned our guns with than vs. standard 00, much better, tighter patterns with the FC.
 
I have 5 12ga 870s in various configurations, one is a factory tactical model, one a Marine magnum with a factory longer magazine tube. I have extension tubes on all the others, except my bird gun (I have one for it but haven't had it on in a long time, it will hold ten 2-3/4 rounds!) I don't find any of them heavy or unwieldy. Maybe a life of working with my hands gives me a different feel for them.
 
Back
Top