$549.99 + FREE SHIPPING No Code Needed PSA 10.5″ CHF 5.56 NATO 1/7 9″ Lightweight M-Lok Upper w/ Sig Sauer Romeo 5 & MBUS Sight Set Get This Deal All Deals PSA 10.5″ CHF 5.56 NATO 1/7 9″ Lightweight M-Lok Upper w/ Sig Sauer Romeo 5 & MBUS Sight Set PSA 10.5″ CHF 5.56 NATO 1/7 9″ Lightweight M-Lok Upper w/ Sig Sauer Romeo 5 & MBUS Sight Set for $549.99 + FREE SHIPPING