Ncstar VISM AR-10 Upper Receiver Block

Aero Precision AR-15 Assembled Upper Receiver, OD Green, APAR501663AC

Guntec USA AR-15 Stripped Billet Upper Receiver, Green, GT-UPPER-GREEN

Stag Arms AR-15 Tactical Upper Receiver, 5.56x45mm NATO, 7.5in Barrel, GOV-CMV Profile, 1-7 Twist, 1/2X28, Left Hand, VG6 Delta, Chromephos, FDE, STAG15111921

American Tactical Imports AR-15 Stripped Poly Hybrid Upper Receiver, Black, ATIHUP200

Guntec USA AR-15 Stripped Billet Upper Receiver w/12in Ultralight Series M-Lok Handguard, Flat Dark Earth, GT-UPPER-SET-FDE-12MLK

Aero Precision Upper Receiver Assembled, AR-15, M-LOK Handguard, Ceracote, Sniper Grey, APAR501812AC

XTS Complete Upper Receiver W/O BCG W/ 12in Ce Rail, USA Edition AR-15, 24.75In, 16in Barrel, Carbine, 1-8 Twist, 1/2X28 Thread, M-LOK, Stainless Steel Bird Cage, Black Nitride Finish, XTSCU16US

Guntec USA AR-15 Stripped Billet Upper Receiver w/15in Ultralight Series M-Lok Handguard, Black, GT-UPPER-SET-BLK-15MLK

XTS Complete Upper Receiver W/O BCG, AR-15, 223/5.56, 24.75In, 16.5In, Carbine, 1-8 Twist, 1/2X28 Thread, M-LOK, Bird Cage, Black Nitride Finish, XTS-CU-16BK

Stag Arms AR-15 Tactical Right Hand Upper Receiver, 5.56 NATO, 10.5in Barrel, GOV-CMV Profile, 1-7 Twist, 1/2 X 28 Thread, VG6 Delta, FDE, STAG15101722

Stag Arms AR-15 A3 Stripped Upper Receiver, Right Hand, Cerakote, FDE, STAG300863

Tacfire AR-15 5.56/.233/.300AAC Stripped Upper Receiver W/M4 Feed Ramps, Black, UP01

Guntec USA AR-15 Upper Receiver Assembly Kit, Trap Door Assembly, Cerakote Flat Dark Earth, GT-URK-FDE

Guntec USA AR-15 Complete 5.56 Upper Receiver W/O Lower Parts Kit, N.4, 15in Air-Lok M-Lok Handguard, MLS Gen 2 Stock Assembly, Carbine Length, .750 Gas Block, 16in 5.56mm M4 4150 Barrel, 1-7 Twist, 1

XTS Complete Upper Receiver W/O BCG, AR-15, 223/5.56, 16.5In, 7.5In, Pistol, 1-7 Twist, 1/2X28 Thread, M-LOK, Bird Cage, Black Nitride Finish, XTS-CU-7BK

Aero Precision AR-15 Complete Upper Receiver, 5.56, Carbine Length, 10.5 Inch Barrel W/Pinned FSB, Magpul MOE SL Handguard, A2 Flash Hider, Anodized Black, APAR502505M3

Aero Precision AR15 Stripped Upper Receiver - XL, Black, APAR611310C

XTS Complete Upper Receiver W/O BCG, AR-15, 223/5.56, 19.5In, 10.5In, Carbinel, Government, 1-7 Twist, 1/2X28 Thread, M-LOK, Bird Cage, Black Nitride Finish, XTS-CU-10BK

XTS Complete Upper Receiver W/O BCG, AR-15, 300 BO, 19.5In, 10.5In, Pistol, 1-8 Twist, 5/8X24 Thread, M-LOK, Bird Cage, Black Nitride Finish, XTSCUBO10BK

CMMG Mk4/AR15 Upper Receiver Assembly, Coyote Tan, 55BA290-CT

Guntec USA AR-15 Stripped Billet Upper Receiver w/7in Ultralight Series M-Lok Handguard, Flat Dark Earth, GT-UPPER-SET-FDE-7MLK

XTS Complete Upper Receiver W/O BCG, AR-15, 300 BO, 19.5In, 10.5In, Pistol, 1-8 Twist, 5/8X24 Thread, M-LOK, Bird Cage, Black Nitride Finish, Silver, XTSCUBO10SL

Andro Corp Industries AR-15 Complete M-LOK Upper Receiver With Flash Hider Assembly, .300BLK, 18In, 10in Barrel, Medium, Pistol Length, 1-7 Twist, 5/8X24 Thread, A2, Anodized, Black, U30010

Stag Arms AR-15 A3 Stripped Upper Receiver, .223/5.56Mm, Type 3 Hard Coat Anodized, Right Hand, Black, STAG300264

XTS Complete Upper Receiver W/O BCG, AR-15, 300 BO, 19.5In, 10.5In, Pistol, 1-8 Twist, 5/8X24 Thread, M-LOK, Bird Cage, Black Nitride Finish, Blue, XTSCUBO10BL

Stag Arms AR-15 Tactical Right Hand Upper Receiver, 5.56 NATO, 16in Barrel, Hanson Profile, 1-7 Twist, 1/2 X 28 Thread, VG6 Delta, Black, STAG15100142

Troy AR-15 A3 Upper Receiver Assembly, 223 Wylde, 11.5in Barrel W/ 10.5in SOCC-Series Handguard, Black, Carbine, SUPG-A3S-11BT-00

XTS Complete Upper Receiver W/O BCG W/ 12in Rail, AR-15, 223/5.56, 24.75In, 16.5In, Carbine, 1-8 Twist, 1/2X28 Thread, M-LOK, Bird Cage, Black Nitride Finish, XTS-CU-12BK

Stag Arms AR-10 Stag 10 Stripped Upper Receiver, .210 DPMS High Profile, Stripped, Cerakote, FDE, STAG300879

Guntec USA AR-15 Complete 9mm Upper Receiver, Mil-Spec Charging Handle, 7 Inch M-Lok Handguard, 5.5 Inch Contour 4150 Barrel, 1-10 Twist, 1/2X36 Slim Line Flash Cone, Black, 9MM-KIT-2

DEMO, OP Exclusive Moriarti AR-15 Pencil Upper Receiver Assembly, 5.56x45mm NATO, 16In, Mid, M-LOK, 1-7 Twist, 1/2X28 Thread, Diamond Cut Free-Float Handgrd, Tri Port Muzzle Brake, Black, MAR-5.56-16-12-TRI

Luth-AR A3 Complete Upper Receiver Assembled, 16In, Lightweight Barrel, 5.56Mm, 1-7 Twist, 1/2 X 28 Thread, A2 Flash Hider, W/ Key MOD Palm Handguard, Black, BA-L16-7

GUNTEC USA Ar 15 Stripped Billet Upper Receiver & 15in Air Lite Series Keymod Handguard Combo Set, Anodized Blue, GT-UPPER-SET-BLUE-15AIRLITE

Aero Precision AR-15 Complete Upper Receiver, 5.56, Rifle Length, 20 Inch Barrel W/Pinned FSB, Magpul MOE Handguard, A2 Flash Hider, Anodized Black, APAR502501M66

Guntec USA AR-15 Stripped Billet Upper Receiver 15 in Air Lite Series Honeycomb M-LOK Handguard Combo Set, Anodized Gold, GT-UPPER-SET-GOLD-HC