Bren gun History and development

[Brit plumber]

As Peter has said there are a lot of errors but here are a few facts for you.

Enfield made the Mk1, Mk1 (ptn a or M) and Mk3.
Inglis made the Mk1, Mk1m & 2 in .303 and the 7.92mm Mk1 (which was a Mk2 303 style Bren body)
Lithgow made the Mk1, 2 styles of Mk1 (ptn a or M)

All 3 manufacturers made intermediate guns (these are guns on the production line when the Mk1 became the Mk1m) and all Mks will fit the Mk1, Mk1*, Mk2 or Mk2* tripod.

All Mk1 guns use a drum sight not a ladder sight.

There's a few things to get you started.