CMMG’s PS90 SBR threaded barrel is constructed of 4150 chrome moly vanadium with chrome lining and a maganese phosphate coating. It is 10.4″ long and is chambered for FN 5.7x28mm caliber.
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Ballistic Advantage BABL300002F Modern Series 300 Blackout 8.30″ Black QPQ Finish 4150 Chrome Moly Vanadium Steel Material BA Hanson Pistol Length with Low Profile for AR-15
$199.50
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