Geissele URG-I Near Clone 5.56 NATO 14.5" 1:7" Gov Bbl DDC Complete Upper Receiver Group w/13.5" M-LOK MK16 SMR 08-159

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

Daniel Defense 5.56 NATO 11.5” 1:7” Bbl Contract Overrun Upper Receiver w/DD4 7.0 Handguard WEBGB-07419-URG

HK MR556A4 11" Upper Receiver Kit w/Bolt, Buffer Spring, M-LOK, Supp Ready, Adj Gas Regulator, Pic Rail, & Ext Ambi Charging Handle 51000385

Daniel Defense DDM4V7 S 5.56 NATO 11.5" Bbl Complete Upper Receiver Group 23-128-00275-047

Geissele URG-I Near Clone 5.56 NATO 10.3" 1:7" Gov Bbl DDC Complete Upper Receiver Group w/9.3" M-LOK MK16 SMR 08-176

Geissele Super Duty MOD1 5.56 NATO 16" 1:7" CHF Chrome Lined Bbl Black Complete Upper Receiver Group 08-548B

Geissele Super Duty MOD1 5.56 NATO 14.5" 1:7" CHF Chrome Lined Pinned & Welded Bbl Black Complete Upper Receiver Group 08-547B

Daniel Defense DDM4V7 Black 5.56 NATO 16" Upper Receiver Group 23-128-02339-047

Geissele Super Duty MOD1 5.56 NATO 16" 1:7" CHF Chrome Lined Bbl DDC Complete Upper Receiver Group 08-548S

Daniel Defense MK18 Flat Dark Earth 5.56 NATO 10.3" Short Barrel Upper Receiver Group 23-004-08013-011

Daniel Defense M4A1 FSP FDE 5.56 NATO 14.5" Bbl Upper Receiver Group w/Pinned SureFire SF3P Flash Hider 23-004-09376

Geissele Super Duty MOD1 5.56 NATO 12.5" 1:7" CHF Chrome Lined Bbl Black Complete Upper Receiver Group 08-545B

Daniel Defense MK18 Black 5.56 NATO 10.3" Short Barrel Upper Receiver Group 23-004-08013-006

Daniel Defense DDM4V7 LW 5.56 NATO 16" Bbl Upper Receiver Group 23-128-02932-047

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

Geissele Super Duty MOD1 5.56 NATO 12.5" 1:7" CHF Chrome Lined Bbl DDC Complete Upper Receiver Group 08-545S

HK MR556A4 16.5" Upper Receiver Kit w/Bolt, Buffer Spring, M-LOK, Supp Ready, Adj Gas Regulator, Pic Rail, & Ext Ambi Charging Handle 51000384

Geissele Super Duty MOD1 5.56 NATO 10.3" 1:7" CHF Chrome Lined Bbl DDC Complete Upper Receiver Group 08-543S

Daniel Defense M4A1 FDE 5.56 NATO 14.5" Bbl Upper Receiver Group w/Pinned Ext. Flash Hider 23-004-13150

Daniel Defense DD4 RIIIS 5.56mm NATO Black Upper Receiver Group w/ 11.5" Barrel & Carbine Length Gas System 23-191-02397-006

Daniel Defense MK18 RIII 5.56mm NATO Flat Dark Earth Upper Receiver Group 23-004-81721-011

Geissele Super Duty MOD1 5.56 NATO 13.9" 1:7" CHF Chrome Lined Pinned & Welded Bbl Black Complete Upper Receiver Group 08-546B

Geissele Super Duty MOD1 5.56 NATO 14.5" 1:7" CHF Chrome Lined Pinned & Welded Bbl DDC Complete Upper Receiver Group 08-547S

Daniel Defense DD4 RIIIS 5.56mm NATO Flat Dark Earth Upper Receiver Group 23-191-02397-011

Geissele Super Duty MOD1 .300 BLK 8" 1:8" CHF Chrome Lined Bbl DDC Complete Upper Receiver Group 08-553S

Daniel Defense MK12 SPR Black 5.56 NATO 18" Upper Receiver Group 23-142-10035

Daniel Defense MK18 RIII 5.56mm NATO Black Upper Receiver Group 23-004-81721-006

Geissele Super Duty MOD1 5.56 NATO 10.3" 1:7" CHF Chrome Lined Bbl Black Complete Upper Receiver Group 08-543B

Daniel Defense DDM4V7 Pro 5.56 NATO 18" Bbl Upper Receiver Group 23-128-20044-047

SOLGW M4-L89 Broadsword 5.56mm 11.5" No BCG/CH Upper Receiver M4L89BSUPPER-11.5-556

Daniel Defense M4A1 RIII 5.56mm NATO Flat Dark Earth Upper Receiver Group 23-004-01097-011

Daniel Defense M4A1 RIII 5.56mm NATO Black Upper Receiver Group 23-004-01097-006

Geissele Super Duty MOD1 .300 BLK 8" 1:7" CHF Chrome Lined Bbl Black Complete Upper Receiver Group 08-553B

Geissele Super Duty MOD1 5.56 NATO 13.9" 1:7" CHF Chrome Lined Pinned & Welded Bbl DDC Complete Upper Receiver Group 08-546S

Daniel Defense DD5 V4 7.62x51mm NATO 18" Bbl M-LOK Complete Upper Receiver Group 23-158-12058

Daniel Defense DD5 V3 7.62x51mm NATO 16" Bbl M-LOK Complete Upper Receiver Group 23-157-11059

Daniel Defense DD4 RIII 5.56mm NATO Black Upper Receiver Group 23-191-20088-006

SOLGW M4-L89 Broadsword .300BLK 8.5" Upper Receiver M4L89BSUPPER-8.5-300

Sig Sauer SURG Next Gen 5.56x45mm Inconel Suppressor SURG556

Daniel Defense DD4 RIII 5.56mm NATO Flat Dark Earth Upper Receiver Group 23-191-20088-011

LWRC ICDI M-LOK Direct Impingement 5.56mm NATO 16.1" 1:7" 1/2x28 Bbl Black Complete Upper Receiver ICDIU5B16ML

LWRC IC-PSD 5.56mm NATO 8.5" 1:7" 1/2x28 Bbl FDE Personal Security Detail Complete Upper Receiver ICPSDU5CK8

LWRC ICMKII 5.56mm 10" 1/7" 1/2x28 Black Short Barrel Rifle Upper ICMKIIU5B10S

B&T APC9/GHM9 APC9 Pro Trigger Group Standard Complete BT-361020

LWRC ICDI Direct Impingement 5.56mm NATO 16.1" 1:7" 1/2x28 Bbl Black Complete Upper Receiver ICDIU5B16

LWRC IC-A5 .300 Blackout 10.5" 1:7" 1/2x28 Patriot Brown Complete Upper Receiver ICA5U3PBC10

LWRC IC-A5 .300 Blackout 10.5" 1:7" 1/2x28 FDE Complete Upper Receiver ICA5U3CK10