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Questions & Answers
Is this for 12 guage Expert Answer

No, this adapter is for 20 gauge shotguns.

by Nick B., Gear Expert, October 28, 2021
Mine will not fit in my H&R 20 ga. nor will it fit in my Win. 37 20 ga. It will work in my Stevens model 94. How can it be fixed for the other 2. Expert Answer

Please email us at TechSales@OpticsPlanet.com so that we can help troubleshoot your issue.

by Nick B., Gear Expert, October 28, 2021
Customer Reviews
Helpful Positive Review
Bad logistics by Guy, Verified Owner, February 27, 2022
Waiting over two years,Sent me the wrong item (TWICE !!).Sent it back (TWICE!!) I'VE been with Optics Planet for quite awhile now. I'm still ordering things,Just disappointed.Get the right people to do the right thing,on ordering stuff and getting i...
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1/1 found this helpful
Most Recent Reviews
Work on my gins by David Sikes, August 31, 2025
I have these adapters in three different brands of break action shotguns a ATC 20 ga , a Rock Island Armory 12 ga and a Stoger 12 ga Coach Gun. They fit fine I think the trick is to use them on guns with either screw in chokes or nothing with a fixed...
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Most Recent Reviews
I tried to get these chiappa inserts that I already own. They won't fit a Stevens single Shot, nor 2 other makes of single Shot shotguns. Be sure to state the fact that maybe only Chiappa shotguns will use these insert. The instructions reveal a Chia...
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Read All 3 Reviews
Caliber:
.357 Magnum, 20 Gauge
Magazine Capacity:
0 Round
Condition:
New

Code: 33-CNC-CF710404-NCNUT-ST-12-0RD

MPN: 710404

UPC: 8053670716438

List: $73.99Save 24%
$55.99

Product Info for Chiappa Firearms X-Caliber 20ga/357/.38 Gauge Adapter Insert

The 20GA/357 / 38 CAC Adaptor Insert is designed to fit all Chiappa magnum pump shotguns that have a magazine port that is blocked. This small block insert adapter allows you to convert your 20GA/357 / 38 caliber handgun to a 357 magnum and back again. This insert is required to convert the handgun back to standard caliber and function. Conversion of the handgun to a 357 magnum firearm using the correct adapter is essential. The correct adapter may not be the one you need to convert your shotgun to a 357 magnum or larger caliber.image

Specifications for Chiappa Firearms X-Caliber 20ga/357/.38 Gauge Adapter Insert:

Newitem: Yes
Type/color: Gauge adapter insert
Size/finish: 20ga/357mag/38spl
Material: Steel
Other features: For use with any break open shotgun recommended extractor, 8" fully rifled, blued finish

Package Contents:

  • Chiappa Firearms X-Caliber 20ga/357/.38 Gauge Adapter Insert

Chiappa Firearms X-Caliber 20ga/357/.38 Gauge Adapter Insert Orderable Models

List of Orderable Models

  • Chiappa Firearms X-Caliber 20ga/357/.38 Gauge Adapter Insert , MPN: 710404 , UPC: 8053670716438 , Code: 33-CNC-CF710404-NCNUT-ST-12-0RD

Chiappa Firearms X-Caliber 20ga/357/.38 Gauge Adapter Insert Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Chiappa Firearms X-Caliber 20ga/357/.38 Gauge Adapter Insert , MPN: 710404-EDEMO , Code: 33-CNC-CF710404-NCNUT-ST-12-0RD-EDEMO-WP-F
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