XM 12-22 for 40mm, 22LR Hornet's Nest - Rifled 40MM XM 12-22 Rifled This round allows you to load and fire (12) .22 LR shells with the use of one large pistol primer from your 40MM grenade launcher. Manufactured from high quality aluminum and then hard coat anodized. Firing pins and components manufactured from tempered 17PH stainless steel. The new, improved design incorporates a replaceable primer pocket by using a cut down .45 ACP brass casing. It is installed with a press-fit. This is an awesome addition to your 40MM munitions. .22 LR shells not included. It is the responsibility of the buyer, not the seller, to ascertain and obey all applicable local, state, federal, and international laws in the regard to the possession, use and sale of any item purchased. By placing an order, the buyer represents that the products ordered will be used only in a lawful manner. Purchaser is solely responsible for any wads, projectiles or other substances used when detonating these casings. Seller will not be held liable for the misuse of any product purchased from us or any of our direct distributors or dealers. By purchasing this item you agree and fully understand our legal agreement/terms and conditions. Also, injury can occur using this item. Using this device for destructive purposes may violate federal law. The ATF takes these violations very seriously. The penalty for possessing an un-registered destructive device is 10 years in prison and a $250,000 fine.