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

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

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

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

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

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

Daniel Defense DDM4 300S .300 BLK 10.3" Bbl Complete Upper Receiver Group 23-088-19020-047

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

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

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

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

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

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

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

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 Flat Dark Earth Upper Receiver Group 23-191-02397-011

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

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

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

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

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

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

Sig Sauer MCX SURG 5.56x45mm Suppressed Upper Receiver Kit w/ Folding Stock & Adapter (NFA) UAMCXA-SURG

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

Daniel Defense DD5 V4 6.5 Creedmoor 18" Bbl M-LOK Complete Upper Receiver Group 23-158-04211

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

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

Daniel Defense Big Hole Flat Top Upper Receiver w/Feed Ramps 04-012-09001

Daniel Defense DD5 V3 6.5 Creedmoor 20" Bbl M-LOK Complete Upper Receiver Group 23-165-05209

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

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

Seekins Precision SBR8 .300 Blackout 8" 1:8" Bbl Black Complete Upper Receiver 0011100057

Q, LLC. Sugar Weasel .300 BLK 13" Upper *BCG Not Included* ACC-SW-300-13IN-UPPER

Q, LLC. Sugar Weasel 5.56 13" Upper *BCG Not Included* ACC-SW-556-13IN-UPPER

LWRC ICDI Direct Impingement 5.56mm NATO 16.1" 1:7" 1/2x28 Bbl FDE Complete Upper Receiver ICDIU5CK16

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

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

LWRC IC-PSD 5.56mm NATO 8.5" 1:7" 1/2x28 Bbl Black Personal Security Detail Complete Upper Receiver ICPSDU5B8

LWRC ICDI M-LOK Direct Impingement 5.56mm NATO 16.1" 1:7" 1/2x28 Bbl OD Green Complete Upper Receiver ICDIU5ODG16ML

LWRC ICDI M-LOK Direct Impingement 5.56mm NATO 10.5" 1:7" 1/2x28 Bbl Black Complete Upper Receiver ICDIU5B10ML

LWRC IC-A5 5.56mm NATO 10.5" 1:7" 1/2x28 FDE Complete Upper Receiver ICA5U5CK10S

LWRC IC-A5 .300 Blackout 10.5" 1:7" 1/2x28 OD Green Complete Upper Receiver ICA5U3ODG10

LWRC IC-A5 .300 Blackout 10.5" 1:7" 1/2x28 Black Complete Upper Receiver ICA5U3B10

RISE Armament Watchman XR 6mm ARC 18" Bbl Black Complete Upper RA-6ARC-CU-BLK-18