GC_UPC CMMG 30AC278MB Dissent MK4 300 Blackout 30+1 10.50" Midnight Bronze Rec Picatinny Brace Adapter 9.60" M-LOK Handguard Left Side Charging Handle Zeroed Linear Comp TriggerTech Trigger Adj. Gas Block $1,638.68 30AC278MB show more like this Free Shipping GunStuff TV