12ga to 380 back

380 12 Gauge Shotgun Adapters

(34 customer reviews)


380 Auto Shotgun Adapters for 12 Gauge Shotguns

Adapters come in 3 Lengths

2 3/4″, 11″ and 18″

All Adapters are Fully Rifled with a 1-12 or 1-18 Twist Rate.

Select Length elow: 
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380 Shotgun Adapters for 12 Gauge Shotguns.

380 Shotgun Adapters Allow a 12 Gauge Break Action Shotgun to also use 380 Auto Ammo.

Compatible with 12 gauge Break Action single and also double barrel shotgun.

Heavy Duty Steel Construction

Viton O-Rings As a result,  easily achieving a good fit for 12 gauge shotguns.
380 Shotgun Adapters have Rifle dimensions of .355″/.349″ with 6 lands and .125″ wide
1:12 twist rate for 2 3/4″, 6″ and 11″
1:16 twist rate for 18″
*Actual product may vary slightly form photos.

What are Shotgun Adapters?

Shotgun Adapters frequently called Chamber Reducers or Shotgun Barrel Inserts. Our shotgun adapters allow you to use other types of ammunition in a Break Action Shotgun. Including double barrel and over and under double barrels in addition to the popular single barrel break action. We offer several different versions to suit your preference in ammunition, as well as length. 12 and 20 Gauge shotgun adapters are our most popular adapters followed closely by the 410. 16 Gauge is something we plan on expanding in the future.


380 Shotgun Adapters

Most of our shotgun adapters come in different lengths to suit your needs. Some like the secure storage and portably of Shell length adapters. Whereas some are looking to get the most fps (feet per second) or accuracy out of their adapter. Black Oxide has become our standard finish. We can offer unfinished adapters during our production if you have requested one.

FPS (Feet Per Second)

As a general rule, the longer the adapter, the more FPS it produces. However, with low-pressure rounds such as the 45 colt, the fps difference is minimal. If you are interested, here is an excellent website that gives a good idea of fps per inch BBTI. All of our shotgun adapters are entirely made in the United States and are an affordable addition to your break action shotgun. Thank you for you interest in our Shotgun Adapters or Chamber Reducers. We are working to make more adapters for more calibers, so you can sign up to be notified here
The video below gives a brief demonstration of how they work.

We are working to make more adapters.In addition to more calibers, so you can sign up to be notified here. Thank you for your interest.

If you like our 380 Shotgun Adapters, check out our other Shotgun Adapters

Additional information

Weight N/A
Dimensions N/A

2 3/4", 6", 11", 18

34 reviews for 380 12 Gauge Shotgun Adapters

  1. Steven R. (verified owner)

    Timely shipment!

  2. scott (verified owner)

    Seems like premium quality. Unfortunately every time I try to find an insert it always out of stock and you never notified me when it would be? I filled out the notify me request?

  3. David Albrecht (verified owner)

    Recently ordered this insert in 11″, but got notified that they only had one in 18″, which is what I really wanted anyway. The product arrived in perfect condition, well packed and with clear and concise instructions. Having owned “other” shorter length brands, this one has proven to be superior in all aspects. Just shot this at my local indoor range in my H&R and am beyond impressed. In fact I bought one in .45 auto and am awaiting delivery of one in .44 magnum. Thank you Chaszel!

  4. Robert C. (verified owner)

    I think that it is great that a product such as this one is available at a fair price. i am looking forward to using it. Too there are so many options to choose from. Quick delivery time as well.

  5. Clyde (verified owner)

  6. Anonymous (verified owner)

    Excellent accuracy. Quality built. Fast shipping.

  7. Randy S. (verified owner)

    Love the quality of this adaptor that I bought the 9mm and 22LR. Shipping was speedy. I will be buying more.

  8. Ian Hernandez (verified owner)

    Flawless. Fast ship

  9. Anonymous (verified owner)

  10. Gordon Haug (verified owner)

    Tried this with both factory and reloaded 380 ammo. Fit well in the chamber of my single shot 12 gauge but it did not shoot consistent patterns.

  11. James Davis (verified owner)

    Very prompt service exactly as advertised. Very pleased can’t wait to order again when stock is back.

  12. Ferran M. (verified owner)

  13. Billy Cooper (verified owner)

    Haven’t used theirs one yet, but I’m guessing it’s good as all the rest.

  14. Peter Johnstone (verified owner)

    Another very well made adapter from the mighty fine folks at Chaszel👏👍

  15. Curtis Dowling (verified owner)

    It is made with real quality!

  16. Jerry (verified owner)

    Well built and works great

  17. Juan Salinas (verified owner)

    Very nice i loved it

  18. Curtis Dowling (verified owner)

  19. Anonymous (verified owner)

  20. Hank (verified owner)

    Top notch !

  21. Robert T. (verified owner)

    Adapter #6 for me and I’m definitely coming back again. It’s the quality, performance, value and service offered by Chaszel that has me adding to my collection every chance I get. I looked at the “name brands” and am so glad I found this craftsman instead – I don’t think the big names offer nearly as much for more cost. Thank you.

  22. Anonymous (verified owner)

    I bought the 11″ barrel for the 380 in 12 gauge. Arrived very promptly and was well packaged. Product seems to be very well made. Only glitch I had was the last inch or so of the barrel wouldn’t go into the NEF shotgun I was using. I had to cut off the o-ring that fits into the shotgun chamber in order to close the gun.
    Weather has kept me from much exploration with this combo, but I have already seen the 11 inch barrel allows the 380 to reach its full potential with very mild handloads. I wanted to use this combo as a “garden gun” or backyard gun for varmints, but I will have to dial my loads down a bit since the penetration and destructiveness with cast bullets are surprising. Need better sights to make an assessment of accuracy, but I think it will be fine for my purposes.

  23. John Brace (verified owner)

    Have not tried it yet, but it looks good and arrived earlier than expected.

  24. Ronnie m. (verified owner)

    Will buy more when available.

  25. Randle Petway (verified owner)

    Works great, shoot great

  26. Mark A. (verified owner)

  27. Jim Moore

    I have several of the Chaszel inserts. Shooting this 12 to 380 is a really great way to have fun. It is accurate enough to get 3/4″ to 1 1/4″ groups at 35 yards. And I have no problem hitting 4 inch targets from 50 to 65 yards. I can hit a 10″ target at 100 yards 10 out of 10 times consistently. To get an idea of what I’m talking about you can view my video assessment of it at https://www.youtube.com/watch?v=pNPNfdosHmg&t=240s I changed scopes since the video was done and now I’m hitting 2″ and 3″ spinners at 65 yards. I can assure you the quality of workmanship and performance of the Chaszel inserts are the best on the market.

  28. Matthew J (verified owner)

    Well worth the price. Nicely fabricated and finished. I can’t wait until the 45 70 adapter is back in stock.

  29. Robert R. (verified owner)

    Great service and timely delivery.

  30. Jose Ramirez (verified owner)

    Best 12g Adaptors in the Market, I have five others.

  31. Peter (verified owner)

    It did not fit 12 gauge on first try ,however I purchased it to check size of 380ACP re-loads.

  32. Leigh (verified owner)

  33. Michael Packard (verified owner)

    Awesome adapters very accurate

  34. Jeffery F. (verified owner)

    Perfect for my scavenger single shot shotgun setup.

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