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We are now offering complete RDB 9mm uppers. Unlike our other 9mm uppers, these are built with CMMG BCG's and 5" barrels. These are A1 type receivers with rear sight, dust cover and forward assist installed. The barrels are threaded 1/2x28 for standard suppressors and are (non-ported). They will be built using our CAR-15 SD Commando handguard assembly with 1.8" ID so most cans will tuck. These are perfect for those who already have 9mm suppressors but like the SD look. Please allow 2 weeks lead time as these are built per order.