If you already have fun plinkers in abundance I would go 375 or 458 socom. You get good punch, it's some thing that's not the norm, they use mags you already have and both work really well with shorter 11-14" barrels. Tromix has bolt barrel combos for very reasonable.
12" bolt barrel combo $339
12" stainless combo $359
And Tromix is arguably the best in big bore ar.
12" bolt barrel combo $339
12" stainless combo $359
And Tromix is arguably the best in big bore ar.
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