Hornet's Nest Round for 40MM, 410 Shotshells

About this product

The Hornet's Nest round is a 40MM shotshell adapter — a reloadable device that lets you load four .410 shotshells into a single 40MM grenade launcher round and fire them off one large pistol primer. It isn't ammunition in the traditional sense; it's a machined carrier that turns a 40MM launcher into a multi-shot .410 platform for the shot that's already loaded inside it. Because the launcher itself is a destructive device under federal law, this round is only relevant to owners who already have an NFA-registered 40MM launcher and the tax stamp that goes with it.

What is it used for?

It loads four 2½" .410 shotshells at once into a 40MM launcher and fires them together off a single primer strike, producing a wide shot pattern — the listing quotes roughly a 32" to 34" spread at 10 feet from a 12" LMT-style launcher. It's built for owners of registered 40MM launchers who want a reloadable way to run .410 shot through that platform rather than standard 40MM munitions.

How is it built?

The body is machined from aluminum and hard coat anodized, with the firing pin and other working components made from tempered 17-4 PH stainless steel for durability under repeated firing. The primer pocket is replaceable and uses a cut-down .45 ACP brass casing pressed into place, so the primer end wears as a serviceable part rather than a fixed feature you have to replace the whole unit for.

What launchers does it fit?

The listing calls out two common configurations: 2½" shells for LMT-pattern launchers and 3" shells for the M79. Since 40MM launchers vary in chamber length and this round is a precision-fit reload, match the shell length to your specific launcher rather than assuming one length works across every 40MM host.

Is it reloadable?

Yes — this is described as an original, reloadable design, tested repeatedly with four 2½" .410 shotshells per firing. The replaceable primer pocket is what makes repeat use practical instead of treating the round as disposable after one firing.

Does it work in California?

No, and this isn't a gray area. A 40MM launcher is a destructive device under federal law, and California does not allow civilian possession of destructive devices outside narrow licensed exceptions — a Hornet's Nest round is only usable with a launcher you're not able to legally own as a California civilian in the first place. Read California gun laws before assuming any NFA item is an option here; for this category, it isn't.

Who is this for?

This is a narrow accessory for existing owners of registered 40MM launchers in states where that ownership is legal, who want a repeatable way to run .410 shot through the platform. It is not a beginner item, not a general home-defense product, and not something to buy speculatively before you have the launcher and the paperwork to go with it. Most buyers already know exactly what they're ordering and why, since this is a name-recognition product within a small, well-informed collector community rather than something a first-time NFA buyer stumbles onto.

Is it worth $355.50?

For the narrow audience it's built for — a licensed 40MM launcher owner who wants a durable, reloadable shot carrier instead of a one-time-use option — the stainless internals and replaceable primer pocket justify the price over cheaper disposable alternatives. For anyone outside that audience, the launcher itself is the barrier, not this round.