Pull the lpvo and out a red dot on it. You’re under 7 and have a more useful optic. Lpvo’s are niche and the cheaper ones are crap if you have to shoot from any position but square to the rifle.
My lightweight build runs a faxon pencil barrel, fixed Magpul stock and spada handguard. It's also pinned and welded but the jcompv2 is a little bulky although probably still lighter than an extra inch and a half of barrel. I love it, it wears a primary arms red dot and some Magpul buis. Light enough to one hand it if I had to.