Ian released
a video earlier today with a firearm preserved in Prague, the early 1920s Samostril Netsch. It's basically a Czech BAR, chambered for 7.92mm Mauser. The museum has a webpage with enough information on the gun to put together its stats.
Wt 7.82 kg, ROF 5, Mag 20, Dam 5, Pen 2-3-Nil, Bulk 9, SS 3, Brst 8, Range 100
The one trials it took part in, the gun broke after 23 shots, so there were some robustness issues. It does have some interesting features where the safety seals the rear of the action when engaged, and the front handguard can slide back to block the magazine well if there's no magazine loaded, both presumably efforts by a Great War survivor to keep mud out of the action. As the same sort of proto-SAW that the BAR could have been, it's an interesting what-if weapon.