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Oh well. Where is the best places to cut weight on one of these?


Barrel. And, go light on optics, sights if you can. That Tromix is just under 7 lbs.

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How come AR scopes are all mounted so high?


The barrel is in a straight line with the buttstock, unlike a conventional stock that has drop at the heel. With conventional rings/mounts, the scope is actually too low to get a typical cheekweld.