KAK Complete AR-15 Upper Receiver with 9" M-LOK Handguard - 5.56 NATO - 8"

KAK Industry Upper Completion Kit, Black

Geissele Automatics Geissele URG-I Near Clone 5.56 NATO 11.5" 1:7" Gov Bbl DDC Complete Upper Receiver Group w/10.5" M-LOK MK16 SMR 08-315

Geissele Super Duty MOD1 5.56 NATO 11.5" 1:7" CHF Chrome Lined Bbl Black Complete Upper Receiver Group 08-544B

Battle Arms Authority Elite 16" Upper 5.56x45mm Free Float M-LOK Rail, Black

Battle Arms Authority Elite 16" Upper 5.56x45mm Free Float M-LOK Rail, Black

K-Spec 5.56x45mm Nato Complete Upper Receiver - K-Spec 5.56 Nato 13.9'''' Bbl 1-7 Twist Complete Upper Black

K-Spec 5.56x45mm Nato Complete Upper Receiver - K-Spec 5.56 Nato 14.5'''' Bbl 1-7 Twist Complete Upper Black