The Midwest Industries MISTAPSFBT is a robust side-folding mechanism, fashioned from sturdy 4140 steel. Its full-length locking lug design offers maximum strength and durability. Known for its solid positive lock up in both positions, it ensures the smooth operation of the firearm. The steel clamp comes with a large surface engagement, offering stability during operation.Designed with adaptability in mind, it can be configured to either right or left folding. Its modular design further allows it to accommodate different stock attachments, catering to a variety of applications.This mechanism also allows for the attachment of a Mil-Spec buffer tube. In its unfolded state, it increases the firearm length by 2.5 inches. When folded, it adds a mere 0.75 inches to the firearm length, ensuring it remains compact and easy to handle. Despite its heavy-duty design, the complete assembly weighs just 8.4 oz.All steel parts come with a mag phosphate finish for enhanced durability. The assembly also includes a Buffer Tube Adaptor for convenience.