Have a question you don’t see answered here? Contact us for the answer.

No, this firearm is NOT for beginners! If you are looking for your first firearm, don’t buy this one.

Due to the wide variety of ammunition available in the .357 Magnum caliber, we recommend using Federal or Magtech 125 or 158 grain JACKETED ammunition. Other ammunition can be used, but some setup of the firearm might be required.

It may or may not fit, some modification to the Mag well may be required.

Tritium night sights with genuine Trijicon lamps.

Ballistic versatility, speed, and comfort! Bullets are available in a vast selection of weights and styles, and for the hand loaders, brass is commonly available. This makes the .357 Magnum Automatic very popular with hunters, target shooters, recreational shooters, and some law enforcement and military entities.

Quoted from Yahoo Answers:“357 Sig set out to match ONE specific loading of 357 magnum in a relatively short barrel, and came close. However, you move beyond that one loading and the 357 Sig cannot compete any more, especially with heavy bullets of 140 grains and beyond”.

See the full response …here

See the photo below comparing the size of a Coonan .357 Magnum Automatic with a standard 1911 pistol.



See what you think…

The photo below was taken at Ahlmam’s Gun Range in Morristown, Minnesota. Dan Coonan is shown supervising his 3 daughters as they all shoot Coonan .357 Magnum Automatic Pistols.


We are testing the pistols with a variety of ammunition. Some types of .38 Special ammunition will be able to be cycled simply by changing the recoil spring. The newly designed magazine will accept either .357 Magnum or .38 Special cartridges.  No spacer will be required.

Yes, with a few improvements inspired by John Browning’s 1935 Hi-Power. The extractor is an external design, like a Browning Hi-Power. The barrel is linkless and the trigger is pivoting; both features are similar to the Browning Hi-Power.

For current lead times, please contact customer service at 763.786.1720 or use our contact form.

There are 18 parts that are direct replacements:

  • Hammer & Pin
  • Hammer Strut & Pin
  • Sear, & Pin
  • Sear Spring
  • Disconnector & Pin
  • Thumb Safety
  • Plunger Tube, Pins (Front & Rear), and Spring
  • Barrel Bushing
  • Recoil Plug
  • Grip Screws
  • Grip Bushings

There are 6 parts that require some modification:

  • Firing Pin Stop
  • Grip Safety
  • Recoil Spring
  • Ejector
  • Recoil Spring Tube
  • Sights