Ruger 90712 Ruger-5.7 Value Pack 10rd Magazine Fits Ruger-5.7 5.7x28mm 10rd Black Oxide 2 Pack $79.95
CMMG 57DF1C7 Barrel Sub-Assembly 5.7x28mm 10.40" Black Nitride Finish 416R Stainless Steel Material Pistol Length with Medium Taper Profile for PS90 SBR $275.26