This is a Midwest Industries Mount, model MI-QDBP.
Midwest Industries is a proven leader in the firearm industry. Made in America" focusing on the small details to make your rifle platform better. The addition of their QD Bipod mount to your rifle setup will give you the solid durable lock up your looking for and give you the ability to move your bipod from rifle to rifle. This Harris Type QD Bipod mount is the smoothest functioning QD lever on the market. Its superior clamping will not damage or coin the rail surface.
Features:
Precision machined for optimum return to zero performance and reliability
Fully adjustable with no tools required