British Lewis LMG Return Spring Assembly: BSA Marked Hand Select:Yes although the manufacture dates are

although the manufacture dates are in the late fifties

The original Bren Mark I was equipped with two small ring attachments for the sling

complete with fussee spring cover stud mounts

Below copy is courtesy of martinihenry

British Lewis LMG Return Spring Assembly: BSA Marked Hand Select:Yes although the manufacture dates areOriginal Item: The distinctive profile of the Lewis Light Machine Gun is due in part to its return spring, which is a spiral spring such as one finds in clocks, unlike guns that use coil springs. This return spring is housed in a semicircular housing that projects below the receiver. The assembly consists of the spring itself, the return spring casing, and the return spring hub. Our return spring assemblies are supplied in an original screw top steel