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Chaszel 12 Gauge to 45-70 Government Shotgun Adapter

45-70 Shotgun Adapter

(14 customer reviews)


45-70 Shotgun Adapters for 12 Gauge Shotguns

Available in two Lengths

18″ as well as 24″

Allows a 12 Gauge Shotgun to use 45-70 Government Ammunition


SKU: 232124570b Categories: , , Tags: , ,


45-70 Shotgun Adapters

Allows a 12 gauge Break Action Shotgun to use 45-70 Government Ammo.

45-70 Shotgun Adapters Compatible with 12 gauge Break Action single as well as double barrel shotgun. 
Alloy Steel construction coupled with multiple O-ring configurations. As a result easily achieve a good fit for 12 ga. shotguns.
Rifled dimensions are .457″/.450″ with 6 lands and .141″ wide.
Rifled with a 1:20 twist rate.
18″ or 24″ Long
Black Oxide Coated  
45-70 Shotgun Adapters
2050 FPS for 24″ 
1850 FPS for 18″ with Hornady 250gr MonoFlex Ammo.
I recommend to keep a coat of oil on the insert for more corrosion protection
Made in U.S.A.
Please Note:  Not all shotguns are the same!  While most shotgun are capable of handling high pressure rounds such as the. On the other hand some are not.   Therefore only use these rounds in shotguns that are capable.  For example, a shotgun with a SB1 or Sb2 reciever.  I recommend on any shotgun to test the first shot in a vice while out of harms way in addition  always wear eye and ear protection.  After that if you see that the primer punctured in the round discontinue using this round and use the less powerful round. Such as a 38 Special instead of the 357 Mag These high pressure rounds include: 45-70 Shotgun Adapters., 357 Mag, 327 Shotgun Adapters , 44 Mag, and 22 Hornet.  Please always be safe and aware.
Thank you for reading.


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.

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.

If you like our 45-70 Shotgun Adapters , check out our other Shotgun Adapters

Additional information


18, 24

14 reviews for 45-70 Shotgun Adapter

  1. Stephen Waters (verified owner)

  2. Eric (verified owner)

  3. JOSEPH GULA (verified owner)

    have not got it yet

  4. Robert F. (verified owner)

    Super fast shipping

  5. Anonymous (verified owner)

    Fast shipment packaged well. very impressed with the accuracy of this barrel insert. Quater size group up to 100 yards. Didn’t go pass that range yet!

  6. Robert Pickett (verified owner)

  7. Steven M. (verified owner)

  8. James Wilson (verified owner)

    Very happy with the product

  9. Larry Edgington (verified owner)

  10. Asha Handville (verified owner)

    Just got it and look great can’t wait to try it out

    • Chaszel (store manager)

      Good Afternoon, I’m sorry you have not received your adapter. It was shipped on the 15th, after that it is out of my hands as far as how fast it gets there. All of the longer adapters are shipped Priority MaiL. The tracking was updated yesterday so the delay is most likely due to Covid19. I am again sorry for your inconvenience.


  11. Terry K. (verified owner)

    Great buyer service,shipment extremely fast, I bought a 24” 45/70 adapter and a 18” .44 mag adapter. Both very very well made and tight fit. I haven’t had a chance to test fire them, but I have no doubts about accuracy being great. Do not hesitate to buy or order, as you can’t go wrong! Thanks Chad great experience all around.

  12. Gregory Walter (verified owner)

    Great Insert, excellent workmanship. USPS shipping was a little slow, took 13 days to go from Georgia to Colorado, Probably due to COVID-19 though. Looking forward to my next purchase! Thank you.

  13. Barry Burkhammer (verified owner)

    Awsome timing!!!

  14. kenny

    i use this insert with a compact midland 18.5 backpacker as my bear / moose gun loaded with remington 405 gr soft points , however this insert will shoot just about any off the shelf ammo with ease

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