most of the time the nova kits come with sights, barrel, slide and frame - and include the little bits, like screws etc.
I have fitted meu sights, guns modify(tricky front sight), and the 'nova' (ones that came with it, to two nova slides.
fitting a night? warrior onto a nova kit should be simple. The mag catch wont work, but you can mod it to work, or just buy the 'hex' version of the mag catch off an over seas site.
You should be fine running bull barrels, or straight barrels in any nova gun. Shooters design barrel bushins are for shooters design slides and will not work in a nova/tm gun. (they might be able to be modified buuut not sure)
I run a bull barrel in my nova V12, with a plug and full length guide rod. It is a two piece nova guide rod so install is easy. Obviously, the plug doesn't need the extra 'lip' part on the end because you wont be using a barrel bushing with a bull barrel.
In opposition I have another nova springfield LDC version that I run with straight barrel and short guide rod, but could easily switch to a long guide rod by switching the plug to a straight through version that has the 'lip' to hold the bushing.
I can't comment on AS because Ive never encountered one before.
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