Welcome to J&M Spec.

Makers of the finest, most realistic dummy rounds available.

All of our products are INERT and are safe for function checking, reenacting, film props, or display.

We at J&M Spec. are a group of veterans, reenactors, and competitive marksmen dedicated to making the finest, most realistic INERT display or “dummy” ammunition available. We specialize in military cartridges of the 20th century and Western / Cowboy calibers as well. All of our dummy rounds are made using REAL cartridge cases and REAL bullets, giving them the most realistic weight and feel.

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Order 2 sets – Save 5%
3 sets – Save 7%
4 or more – Save 10%

WWII Cartridge Collection

We now offer “Cartridge Collections” from WWII, the Korean War, and the Vietnam War. As well as, collections by country. The set pictured is our WWII Complete Collection. It consists of every standard rifle and pistol caliber from all major Allied and Axis nations of World War Two. Twenty-five calibers in all!

Our Products

Our products are used for a wide variety of purposes. Our customers include reenactors and museums trying to create the most realistic display possible to educate the public, collectors and individuals with personal firearms displays, professional and amateur gunsmiths alike, and even folks in the film industry. Don’t risk the safety of your display, use our Realistic Dummy Rounds for all your firearms displays or training.

Our products are divided into a few different categories to assist you in finding what you are looking for. Many calibers are listed in more than one category. Don’t hesitate to use the search function either!

  • Calibers by Country – look for the cartridges you want by the nation that made and/or used them.
  • Rifle Calibers & Pistol Calibers – subdivided if there are multiple options for a specific caliber.
  • Commercial calibers – those designed for and used in modern, commercially available firearms, and not used by any nation’s military.
  • Western Cartridges – For all the Cowboys out there. The perfect addition to your “Wild West” collection.

Please contact us!

If you don’t see the caliber you are looking for on our website, please let us know. We are constantly expanding our inventory and are always open to new ideas.

Thank you for visiting!

5 thoughts on “Welcome to J&M Spec.”

  1. Received my 7.7 Arisaka dummies today. Just wanted to let yall know they are awesome. I have been reluctant to buy live rounds due to cost. I really wanted to cycle the action and now I can do that safely. They work great! Oh I found them on Amazon and the business card was in the pack so I had to look yall up. Have a blessed day and I may purchase some other dummies in the near future.

  2. Thanks for the Mosin-Nagant 7.62 dummies I found on Amazon. Great look and feel All the best from Taos

  3. I ordered a 50rnd belt and 5rnds loose of 8mm Mauser the other days via the eBay store and got it today. I have to say I am extremely happy with them. I placed the loose rounds on a stripper clip and they load perfectly into my rifle. The business card was in the box and I had to come check you guys out. I already ordered more dummy rounds and chances are I’ll get more in the future. Really glad I found you guys!!

  4. I purchased 8x53R and 7.7×58 Japanese dummy rounds from JM off GB. These things are great! I especially like that they offer the oddball calibers. It allows me to have something to cycle the actions with on all of my oddballs. I will be back for more, for sure. Thanks Mike!

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