Mag Cap Detent Misalignment

Remington 870 Repair and Gunsmithing.
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Chilly
Experienced Shotgunner
Posts: 69
Joined: Thu Jan 31, 2019 12:49 am

Mag Cap Detent Misalignment

Post by Chilly » Mon Feb 18, 2019 11:30 am

Installing an Uncle Mike's sling swivel mag cap on a mid-80's barrel. The detent pin barely touches the detent holes in the cap. You can see a shined line near my index finger where the pin rubs outside the circumference of the hole pattern. I'll fix this with a small triangle file, cutting a shallow notch radially across the divots. If one doesnt swap barrels you really only need to do this to a few spots in front and behind the last engaged divot.
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Germansheperd
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Re: Mag Cap Detent Misalignment

Post by Germansheperd » Mon Feb 18, 2019 3:23 pm

If that doesn’t work you can get this universal one from Remington and its pretty inexpensive.
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Chilly
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Posts: 69
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Re: Mag Cap Detent Misalignment

Post by Chilly » Mon Feb 18, 2019 3:58 pm

That photo was my inspiration. Quick job to fix what I already paid for though. Thanks.
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Chilly
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Re: Mag Cap Detent Misalignment

Post by Chilly » Mon Feb 18, 2019 6:01 pm

Using a triangle file I grooved to approx the bottom of each divot. Then, thinking that was a rather narrow and sharp groove, I followed with the corner of a small square file.
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Germansheperd
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Re: Mag Cap Detent Misalignment

Post by Germansheperd » Mon Feb 18, 2019 9:34 pm

Good work. That will do the job!

Chilly
Experienced Shotgunner
Posts: 69
Joined: Thu Jan 31, 2019 12:49 am

Re: Mag Cap Detent Misalignment

Post by Chilly » Mon Feb 18, 2019 10:23 pm

Feathered the notch edges so it'll spin on easy but offer more resistance when loosening.
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Scorpion8
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Re: Mag Cap Detent Misalignment

Post by Scorpion8 » Tue Feb 19, 2019 4:46 pm

Good job making lemonade out of lemons. Make sure you blue that filed surface to prevent rust.
Retired USN
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Pain heals, chicks dig scars.....glory -- lasts forever!

Chilly
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Joined: Thu Jan 31, 2019 12:49 am

Re: Mag Cap Detent Misalignment

Post by Chilly » Wed Feb 20, 2019 11:34 pm

Got some Birchwood Casey cold blue on it. Good enough for where it is. There is way more nekkid metal on the mag tube, and Barricade rust preventive spray keeps rust at bay. So the cold blue is more than sufficient.

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