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20 Gauge to 327 18" Back

327 20 Gauge Shotgun Adapter

(4 customer reviews)


327 Shotgun Adapters for 20 Gauge Shotguns

Adapters come in 3 Lengths

5″, 11″ and 18″

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



20 Gauge to 327 Chamber Reducers

327 Shotgun Adapters allows a 20 Gauge Shotgun to use  5 Types of  Ammo.

327 Federal Magnum, 32 Long, 32 Short, 32 H&R Mag and 32 ACP.

For 3″ Or 2 3/4″ Chambers

327 Shotgun Adapters are compatible with Break Action single or double barrel shotgun.
Heavy Duty Steel Construction

Rifled with a 1:12 twist rate.

Rifled Dimensions:  4 Groves x .176 Wide.   Bore .303  / Grove .312

Black Oxide Coated.
*I recommend to keep a coat of oil on the insert for more corrosion protection


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 gov., 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.

If you like our 327 Shotgun Adapters , check out our other Shotgun Adapters

Additional information


5 ", 11", 18"


Black Oxide, No Finish (Silver)

4 reviews for 327 20 Gauge Shotgun Adapter

  1. Robert C. (verified owner)

    Always good service

  2. L (verified owner)

  3. Patrick Pierce (verified owner)

    Very satisfied. Should order one sooner.

  4. J. H. (verified owner)

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