380 Threaded Barrel Chamber Thread View

380 Threaded Barrel


380 Auto (ACP) Threaded Barrel Blanks 

Liners come in 4 different Lengths:

6″, 10″, 20″,28″

The twist rate is 1-12″ for 6 and 10″
The twist rate is 1-16″ for 20 and 28″


380 Threaded Barrel 

Rifled and also Chambered for 380 Auto (ACP)
All the liners / blanks we sell have been tested and can withstand the pressure of the round they are chambered for standalone.

Barrel Liner Specifications

Outside Diameter of .560″ for 6 & 11″
Outside Diameter of .570″ for 20 & 28″

Chambered end Threaded 9/16-18 NF

Muzzle end Threaded 1/2-28 UNEF

Chambered for 380 Auto (ACP). (Now chambered full SAAMI Specifications)

Rifle dimensions for our 380 Threaded Barrel Blanks are .355″/.349″ with 6 lands and .125″ wide.

380 Threaded Barrel Blanks have a twist rate of: 1-12″

All of our barrel liners are also Crowned.

We do not recommend Re-Chambering 380 Threaded Barrel Blanks for a different round, for instance, changing 380 auto to 38sp.

Button-rifled! Made for people who would like to restore accuracy to older guns due to rusted, pitted or just worn out barrels. To install, first drill out existing rifling with a drill a little larger than the liner you are installing. For best results, we would recommend grinding or having someone grind a pilot on the drill about the size of the current rifling because this will keep it centered better , then solder the Barrel Liner in place. Or you can also use JB Weld or Acraglas gel because we have had many customers say they worked well.

Because we are not gunsmiths, these are just suggestions based on what we have learned over the years and from the nice people that we have come in contact with. A skilled gunsmith with proper tools should be able to install these with no problem.

380 Threaded Barrel Blanks are specifically for custom builds.

Chambered end is Threaded 9/16-18 NF, Muzzle end is Threaded 1/2-28 UNEF  as a result it is easy to thread into a barrel block or frame.  In addition the muzzle end is threaded to attach a thread protector, muzzle break, Compensator or a  Flash Hider.

WARNING: Our Gun barrel liners are made and tested for the rounds they are chambered for.  Only use with the specified rounds. It is dangerous to chamber these gun barrel liners in other calibers and can cause serious bodily injury.


If you like this product you may like our other Threaded Barrel Blanks




Additional information

Weight N/A
Dimensions N/A

5.5", 10", 18", 28"


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