.223/5.56 Pistol

MDX Arms MOD1 10.5" 5.56/.223 Upper

Upper takes between 1-9 Business Days to Assemble MDX Arms AR15 Upper Receiver - 10.5" Pistol Length 7075-T6 Upper with forward assist and dust cover MOD 1 Standard 10.5″ MLOK Lightweight Handguard  Low Profile Gas Block Muzzle Threaded...

MDX Arms MOD1 7.5" 5.56/.223 Upper

Upper takes between 1-9 Business Days to Assemble MDX Arms AR15 Upper Receiver - 7.5" Pistol Length 7075-T6 Upper with forward assist and dust cover MOD 1 Standard 7.5″ MLOK Lightweight Handguard  Low Profile Gas Block Muzzle Threaded...

MDX Arms MOD2 10.5" 5.56/.223 Upper

Upper takes between 1-9 Business Days to Assemble MDX Arms AR15 Upper Receiver - 10.5" Pistol Length 7075-T6 Upper with forward assist and dust cover MOD 2 Premium 10.5″ MLOK Lightweight Handguard  Low Profile Gas Block Muzzle Threaded...

MDX Arms MOD2 7.5" 5.56/.223 Upper

Upper takes between 1-9 Business Days to Assemble MDX Arms AR15 Upper Receiver - 7.5" Pistol Length 7075-T6 Upper with forward assist and dust cover MOD 2 Premium 7.5″ MLOK Lightweight Handguard  Low Profile Gas Block Muzzle Threaded...