The stock looks like my old WinApex and was very solid. The sites look the same too and were cheap plastic. Winchester offered the same gun but rebadged to X150. Mine was stainless but the stock sold the gun because it felt well made.
Besides that go get some MMP 45x40 tan sabots, Hornady tans are the same thing. You might want a box of Harvester CrushRibs too. Then go buy some 40cal 180gr GoldDot and/or 200gr XTP bullets and have some fun.
In 45s i usually start with 80gr and seldom go past 110gr of loose powder. Im betting 90gr will shoot good with most 180-200gr 40cal bullets. Watch the bargin cave for deals on Powerbelts, you may like the 300gr if they have them again.
Glad to see another 45 owner.