ACR

By the 21st Century, assault rifles were being designed with the intention of being adaptive, modular and compatible: adaptable to different combat roles, modular in that they were changeable between different caliber munitions, and compatible with different accessories/components. This concept was widely demonstrated by the AR-15 platform used by civilian firearm enthusiasts, who outfitted their AR-15 rifles with various aftermarket receivers and parts. AR-15 rifles are considered extremely modular and adaptable to a variety of different functions, uses, and calibers. Designed by Magpul Indus...