Dear all, Please see my invention attached to fit a standard 22mm OD flash eliminator. As you can see the mechanical attachment bit is sorted out. This rifle grenade is compatible with all 22mm OD flash eliminators. I am open to orders to fit other muzzle diameters (e.g. 12ga shotguns) or cylindrical attachments (e.g. sound moderators). The mass of the version in the movie is about 100g. The final sales version will be no more than 150g. The device contains no energetics and is non-toxic/non-flammable. The device has already been tested successfully against a 55gr 5.56x45mm soft point round. The maximum range of the projectile is about 27m. Now all that remains is testing using standard SS109 5.56x45mm ammo which has better armour piercing capability than the latter ammo (coming soon!). I am confident that these final tests will succeed as it is purely an engineering issue of putting enough bullet-resistant material to withstand penetration, and not a physical limitation of the concept itself. For the moment, I can sell these purely as a safety feature during firearm storage and transport in the event of negligent discharge. Each one will cost GBP£50 + shipping, with some users qualifying for a 10% discount. Arrsers qualify for a 5% discount - please PM me for orders. I ship worldwide. Once I get MoD approval for the sale and use of them as a less-than-lethal tool, I will be free to sell them for such a role to military users. Likewise from the HOSDB for the police. Now every soldier or armed police officer can have LtL capability at 150g extra weight, and GBP£50 cost - without needing a bespoke weapon + ammo In the meantime if you decide to buy them, please consider them to be an additional safety feature akin to a breech flag . The attachment of these onto the muzzles of your firearms does not obviate the same degree of firearm handling care & discipline! The final design will be painted entirely red or some other vivid colour to serve as a visual warning. Think of it as a flying bright red boxing glove The intellectual property of this invention is protected under UK patent law, with international patents pending.