I have actually been acquiring data to compile a list of the similarities and differences between them .1st Gen had 2 different models, XL or all the others. The NP2 is actually a shorter stroke XL. With better QC, piston cushioning, upgraded trigger, and the smoothest shot cycle and easiest cocking, not to mention accuracy of 1 hole 35yd groups at ~$200. Academy still has the black synthetic model for $209. I shot 20 shots over the Chrony today with the XL and NP2 both out of the same tin of CPUM 14.3 grain pellets. The NP2 averaged 830 fps and the XL 880 fps. So I get 3 more fpe from the XL and it's way bigger. I vote np2 / steel eagle all the way! Consistent 22 fpe and AMAZING accuracy comparable to springers 3x the cost. I do recommend the braas washer mod, getting the metal bear trap lever from 1st Gen np gun (~$3), and replacing the piston seal with one sized with an OD of 29.5mm. The factory one is 29mm and I lose 30 fps with it.
Yeah it's plastic.