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 Post subject: DIY Flush Fit 7+1 Magazine for Remington 870
PostPosted: Thu Dec 12, 2019 9:18 pm 
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Location: Pittsburgh, PA
Have you ever wanted a magazine extension that sits flush with the muzzle on your 18" 870? Have you ever wished you could fit that seventh shell in there? Well, I got an old beat up Choate +3 off of ebay last week and decided I'd make myself a custom extension. I put some masking tape on the extension so I knew where to cut, put it in a vise, and used a pipe cutter to trim it and crimp the edge to retain the cap.
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The gun assembled and function tested; it holds 7 shells with a little room to spare which hopefully accommodates the slightly longer Federal buckshot I use for defense. I used a Nordic Components follower and Wolff magazine spring cut to 30". You'll notice that this extension has a glossy finish and the rest of my 870 is bead blasted matte black ...
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Well, it took a few tries to get my compressor running because it's been absurdly cold out but I got it going, blasted the extension, and blued it. The new matte black finish compared to the god awful glossy finish. I'm hoping for better weather tomorrow so I can get some photos of the 870 with it installed.
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 Post subject: Re: DIY Flush Fit 7+1 Magazine for Remington 870
PostPosted: Thu Dec 12, 2019 11:33 pm 
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[quote="Misery556"] I got an old beat up Choate +3 off of ebay last week and decided I'd make myself a custom extension.

I thought they stopped people from selling gun parts on eBay some years ago, To get back on point, how did you bead blast it? Do you have your own cabinet? This is something that I have always been mildly curious about and would probably enjoy doing.

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 Post subject: Re: DIY Flush Fit 7+1 Magazine for Remington 870
PostPosted: Fri Dec 13, 2019 12:10 am 
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Ezra Smack wrote:
Misery556 wrote:
I got an old beat up Choate +3 off of ebay last week and decided I'd make myself a custom extension.

I thought they stopped people from selling gun parts on eBay some years ago, To get back on point, how did you bead blast it? Do you have your own cabinet? This is something that I have always been mildly curious about and would probably enjoy doing.


Yes, I have a 21 gallon compressor and blasting cabinet. I actually use a mixture of fine sand and coal slag. If you get a cabinet, leave the plastic cover on the glass. I mistakenly thought that could be removed as it was merely a packing thing like on new tvs ... nope. I inadvertently frosted that pane of glass after about a year and had to replace it. Cabinets and compressors are not cheap but if you like having the ability to do stuff like this, it's worth it.


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 Post subject: Re: DIY Flush Fit 7+1 Magazine for Remington 870
PostPosted: Fri Dec 13, 2019 9:44 am 
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Nice work and nice photos! Thanks for showing it and telling us about it.

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 Post subject: Re: DIY Flush Fit 7+1 Magazine for Remington 870
PostPosted: Thu Dec 19, 2019 7:33 pm 
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I don't know amigo.

I mean we all have one foot that's bigger than the other but I'm not terribly inclined to whip out a hacksaw and bead blasting tank so I can have a set of matchies.


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 Post subject: Re: DIY Flush Fit 7+1 Magazine for Remington 870
PostPosted: Tue Dec 31, 2019 8:13 pm 
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Buffering wrote:
I don't know amigo.

I mean we all have one foot that's bigger than the other but I'm not terribly inclined to whip out a hacksaw and bead blasting tank so I can have a set of matchies.


Well, I've done these before because I like the flush fit look and being able to have a 7 round magazine is nice too. I hate Remington's factory extension for a number of reasons, I didn't want any of the commercially available 2 shot extensions because they're an inch short of the muzzle, and I was bored. Also, pipe crimper, not a hacksaw haha.


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 Post subject: Re: DIY Flush Fit 7+1 Magazine for Remington 870
PostPosted: Fri Jan 03, 2020 9:45 pm 
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Great job but aesthetics aside, let's look at this from a practice standpoint. Having the barrel a little bit longer longer than your magazine means that in a handling accident or drop the barrel takes the hit rather than the thin walled magazine tube which is not nearly as strong.



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