Buster--
The floorplate looks like it's to a M1917 and the triggerguard is a P14. None of these parts are a sure fit. I am currently working on three P14s from each of the manufacturers and it truly is mind numbing to get the right parts to fit. I can see why the Empire very quickly made these rifles a secondary weapon and probably DP a lot of them for the lack of spare parts.
--fjruple