Sadlak Industries M14/M1A Light Duty Aluminum Front Rail with QD Stud Sadlak Industries M14/M1A Light Duty Aluminum Front Rail QD Stud Once the Front Rail is installed you have flexibility of attaching a clamp-on type Bi-Pod or, with Front Rail with QD Stud a Harris QD type bipod. All hardware and screws have mil-spec. Manganese Phosphate finish.