Mystery part sort of quiz to identify this part

[RCS]

The Colt R75 was for commercial sales but some did end-up in military service

The Model 1918A1 bipod has drawing numbers on most parts like many US military rifles did during the late 1930's. The locking mechanism is different on the legs, which can also telescope and lock. Each leg foot is much thicker too. Attachment 79647

[Peter Laidler]

Our Bren Mk2 bipod was clearly a mechanical copy of the BAR bipod.

[Brit plumber]

I didnt like the BAR bipod or the 1919A6 bipod. I think the Bren mk 2 bipod was much quicker to deploy. The BAR bipod (at least mine was) a wingnut affair that was a PITA.

[browningautorifle]

The BAR bipod

Agreed, for a gun I liked, the bipod was clumsy and not great.

[Peter Laidler]

As I seem to remember it, the only wing nuts on the BAR bipods we had were to extend the legs - that didn't extend on the Mk2 Bren bipod. What I meant by mechanical copy was the angled action that closed the legs on folding rearwards