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Posted: 8/17/2026 6:09:50 PM EDT
 40mm Anti-Personnel Ammo of the Vietnam War with Nic Jenzen-Jones |
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Read the comments… 🙄🙄🙄 So many people have no idea what they’re talking about. The 40MM low velocity grenade launchers make terrible anti personnel weapons. Unless you are within 25 meters of your target, odds of effectively downing a single individual are very low. Adapters (12ga and similar) are just as effective as a sawed off shotgun. Engaging a target beyond 10 meters with a sawed off? Not really. Flechette (specifically the Pace Defense cannon rounds which are the best currently on the market) are good to 10-15 meters. Flechette are very light and tend to tumble. After 15 meters they lack the power to penetrate much. People (especially naïve ones) see the 40MM and think “giant shotgun.” Nope. It’s nothing like a shotgun, and to make that comparison tells me the person making it doesn’t know much. Adapters can be used to fire shotgun shells (I have .410, 20, 16, 12 and 10ga for mine as well as 26.5mm) but, as I said, they are not effective past 15 meters. They see the M576 multi projectile round and think “that’s a huge shotgun shells filled with tons of buckshot…” nope. It holds 21 pellets of #4 buck in a centralized cup. One guy said they were ineffective because the buckshot would spin and get thrown everywhere… nope. The design of the 576 does not spin (regardless of rifling) the cup. The only thing that engages the 1 in 48 rifling of the 79 is the obturator ring at the base, and that sits on the sabot carrier. There’s so much bad information in those comments… good grief. GROG |
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Originally Posted By grog18b: Read the comments… 🙄🙄🙄 So many people have no idea what they’re talking about. The 40MM low velocity grenade launchers make terrible anti personnel weapons. Unless you are within 25 meters of your target, odds of effectively downing a single individual are very low. Adapters (12ga and similar) are just as effective as a sawed off shotgun. Engaging a target beyond 10 meters with a sawed off? Not really. Flechette (specifically the Pace Defense cannon rounds which are the best currently on the market) are good to 10-15 meters. Flechette are very light and tend to tumble. After 15 meters they lack the power to penetrate much. People (especially naïve ones) see the 40MM and think “giant shotgun.” Nope. It’s nothing like a shotgun, and to make that comparison tells me the person making it doesn’t know much. Adapters can be used to fire shotgun shells (I have .410, 20, 16, 12 and 10ga for mine as well as 26.5mm) but, as I said, they are not effective past 15 meters. They see the M576 multi projectile round and think “that’s a huge shotgun shells filled with tons of buckshot…” nope. It holds 21 pellets of #4 buck in a centralized cup. One guy said they were ineffective because the buckshot would spin and get thrown everywhere… nope. The design of the 576 does not spin (regardless of rifling) the cup. The only thing that engages the 1 in 48 rifling of the 79 is the obturator ring at the base, and that sits on the sabot carrier. There’s so much bad information in those comments… good grief. GROG Attached File |
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Originally Posted By grog18b: Read the comments… 🙄🙄🙄 So many people have no idea what they’re talking about. The 40MM low velocity grenade launchers make terrible anti personnel weapons. Unless you are within 25 meters of your target, odds of effectively downing a single individual are very low. Adapters (12ga and similar) are just as effective as a sawed off shotgun. Engaging a target beyond 10 meters with a sawed off? Not really. Flechette (specifically the Pace Defense cannon rounds which are the best currently on the market) are good to 10-15 meters. Flechette are very light and tend to tumble. After 15 meters they lack the power to penetrate much. People (especially naïve ones) see the 40MM and think “giant shotgun.” Nope. It’s nothing like a shotgun, and to make that comparison tells me the person making it doesn’t know much. Adapters can be used to fire shotgun shells (I have .410, 20, 16, 12 and 10ga for mine as well as 26.5mm) but, as I said, they are not effective past 15 meters. They see the M576 multi projectile round and think “that’s a huge shotgun shells filled with tons of buckshot…” nope. It holds 21 pellets of #4 buck in a centralized cup. One guy said they were ineffective because the buckshot would spin and get thrown everywhere… nope. The design of the 576 does not spin (regardless of rifling) the cup. The only thing that engages the 1 in 48 rifling of the 79 is the obturator ring at the base, and that sits on the sabot carrier. There’s so much bad information in those comments… good grief. GROG So my dream of mounting 40mm’s on the top of my car to get out of danger in the middle of an antifa riot is impractical?? 😬 I’ve always been interested in the M79 and its variants plus who doesn’t like a good ‘bloop’ gun. What is the advantage/strength of the 40mm /M79 family from your perspective? I probably won’t give up my dream of putting a 40mm in the roof of my car for the apocalypse though 😁 |
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You’d be better off with a snow plow for those protests. The thing about the 79 and 203 is, they were developed to launch a rather small grenade out to 400 meters (700 for the newer medium velocity) and… that’s it. Of course, when an inventive dude sees that tube, he’s thinking of all the cool stuff he could pop out of it. There were a few successes, the CS, smoke markers, para flares, clusters…. It does well in less lethal applications, like muzzle blast OC/CS, rubber baton and buckshot… Even some other unique rounds… rocket assist HE, thermostatic… but the main function still remains. Pop a small grenade out to 400 meters. The material limitations of aluminum tubes, and the high/low pressure systems will always limit what you can launch and how far it’ll go. |
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