The Assault Rifle in Fallout 4 features a rugged, utilitarian design with a mix of metal and polymer components, reflecting its post-apocalyptic retro-futuristic art style. It has a bulky, angular frame with visible bolts and seams, a ribbed handguard for grip, and a prominent barrel with a compensator. The weapon's surface shows signs of wear, including scratches and scuffs, with a matte finish to reduce glare. Distinctive design elements include a side-mounted ammo counter and a collapsible stock, emphasizing its modular and durable construction.