As of November 2023, the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) rescinded several "Special Explosive Device" exemptions that previously allowed certain smoke grenades to be sold without a license.
Purchasing "mil-spec" (military specification) smoke grenades as a civilian is currently highly restricted in the United States due to recent federal regulatory changes. While true military-issue M18 smoke grenades are generally not available for direct civilian sale, "military-style" alternatives exist for recreational and professional use. buy mil spec smoke grenades
Several manufacturers produce high-output smoke grenades that mimic military performance for training, filming, and airsoft, though they may have specific purchasing requirements. Maximum HC Smoke Military-Style Canister As of November 2023, the Bureau of Alcohol,