Geissele Automatics Super Duty MOD1 Complete AR-15 Upper Receiver - 5.56 - 11.5" - DDC
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Geissele Automatics Super Duty Barreled AR-15 Upper Receiver - 5.56 - 16" - DDC - No Muzzle Device
Geissele Automatics Super Duty Barreled AR-15 Upper Receiver - 5.56 - 14.5" - DDC - No Muzzle Device
Geissele Automatics Super Duty Barreled AR-15 Upper Receiver - 5.56 - 10.3" - DDC - No Muzzle Device
