Forward Defense Munitions, Co. was founded in 2016 to promote truly superior firearm technologies invented by Martin Grier. To achieve this, firearm design was reimagined from the ground up, with a focus on eliminating the most stubborn issues, such as jamming and overheating. The "L5" prototype is the first functional multi-bore single barrel rifle, uses caseless charge block ammunition, and represents a new class of powerful firearms.