Geissele Super Duty MOD1 Complete Upper Receiver Pinned 5.56 13.9"

Geissele Super Duty MOD1 Complete Upper Receiver 5.56 16"

Geissele Super Duty MOD1 Complete Upper Receiver Pinned 5.56 14.5"

Geissele Super Duty MOD1 Complete Upper Receiver 5.56 12.5"

Geissele Super Duty MOD1 Complete Upper Receiver 5.56 11.5"

Geissele Super Duty MOD1 Complete Upper Receiver 5.56 10.3"

Geissele URG-I Near Clone Complete Upper Receiver Pinned 5.56 14.5"

Geissele URG-I Near Clone Complete Upper Receiver 5.56 11.5"

Geissele URG-I Near Clone Complete Upper Receiver 5.56 10.3"

Daniel Defense DD4 RIIIS Complete Upper Receiver 5.56 11.5"

Daniel Defense M4A1 Block II Complete Upper Receiver 5.56 14.5"

Daniel Defense M4A1 FSP Complete Upper Receiver 556 14.5" Pinned

Daniel Defense DDM4V7 Complete Upper Receiver 5.56 11.5"

Daniel Defense MK18 URG Block II Complete Upper Receiver 5.56 10.3"