1944 Inland

[DaveHH]

Inland sand blasted the top portion of their receivers to avoid a shiny surface that reflected sunlight. I think that they were the only manufacturer that did this. I doubt that there was any deception involved with your carbine. I looked at it and it does appear to have most of the correct parts. Type 2 band, Type B angled slide, round bolt blued, the correct trigger housing (Vertical Inland insignia).
I wouldn't change anything on that gun. Get a correct sling or a good repo sling and leave it as is. It may have come with that blued barrel, or someone might have done it later. There is the classic shadow (or in this case a lack of finish) where the band would have sat. The finish on the receiver isn't all that good, but that isn't unusual at all. It is a fine unit as is.