Slingwell marking is exactly like that shown by Painter777 above. There are no crossed-cannon cartouches or any other markings on the stock or handguard other that the P on the front of the pistol grip.
The Universal (small diagonal checkering) buttplate appears to me to be stamped - it's kind of wavy around the edge, but serviceable.
Is that a birch stock? In the photo the "flames" are much more prominent than appear in person. And since I've rubbed in several more coats of
BLO
are just about invisible except on the bottom surface of the forend. The grain is very close, and perfectly matches the 2-rivet handguard, which I guessed to be walnut. But honestly I am not real good at differentiating one type of wood from another.
So this gun was probably built up at some arsenal in a rebuild, and was assembled from a bunch of serviceable components (barrels, trigger housing and parts, bolt and parts, stock, etc.) that were disassembled from other rifles and grouped together randomly?