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 AR-15 Complete Upper Receiver, 5.56, Carbine Length, 10.5 Inch Barrel W/Pinned FSB, Magpul MOE Handguard, A2 Flash Hider, FDE Cerakote, APAR502504M3

Aero Precision AR-15 Complete Upper Receiver, 5.56, Carbine Length, 10.5 Inch Barrel W/Pinned FSB, Magpul MOE Handguard, A2 Flash Hider, Anodized Black, APAR502503M3

Aero Precision AR-15 Complete Upper Receiver, 5.56, Mid-Length, 16 Inch Barrel W/Pinned FSB, Magpul MOE SL Handguard, A2 Flash Hider, FDE Cerakote, APAR502506M65

Aero Precision AR15 Complete Upper Receiver, 16in 5.56 Mid-Length Barrel W/ Pinned Front Sight Base, M4 Handguard, Black, APAR505631

Aero Precision AR-15 Complete Upper Receiver, 5.56, Mid-Length, 16 Inch Barrel W/Pinned FSB, Magpul MOE Handguard, A2 Flash Hider, Anodized Black, APAR502503M65

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

Aero Precision M4E1 Complete Upper Receiver, AR-15, 5.56x45mm NATO, 14.5 in Mid Length Barrel, 12 in M-LOK Handguard, No BCG/CH, Magpul Cerakote, Flat Dark Earth, APAR640232M5

Aero Precision M4E1 Complete Upper Receiver, AR-15, 5.56x45mm NATO, 14.5 in Mid Length Barrel, 12 in Quad Rail Handguard, No BCG/CH, Anodized, Black, APAR640231Q5

XTS Complete Upper Receiver W/O BCG W/ Ce Rail, USA Edition AR-15, 16.5In, 7.5in Barrel, Pistol, 1-7 Twist, 1/2X28 Thread, M-LOK, Stainless Steel Bird Cage, Black Nitride Finish, XTS-CU-7US

Aero Precision M4E1 Mid Barrel Complete Upper Receiver W/Flash Hider, AR-15, 5.56x45mm NATO, 16in Mid Length Barrel, 12in M-LOK Handguard, No BCG/CH, Anodized, Black, APAR640231M7

Tiger Rock AR-15 Complete Upper Receiver, 5.56Mm, 24In, 16in Barrel, M4, Carbine, 1X8 Twist, 1/2X28 Thread, Quad Rail, 15in M-Lok Handguard, Brake, Nitride, Anodized, Black, UB15-15ML

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

Aero Precision M4E1 Complete Upper Receiver, AR-15, 18 in Rifle Length Barrel, 15 in M-LOK Handguard, No BCH/CH, Magpul Cerakote, Flat Dark Earth, APAR640252M8

XTS Complete Upper Receiver W/O BCG W/ Ce Rail, AR-15, .223/5.56, 19.5In, 10.5in Barrel, Pistol, 1-7 Twist, 1/2X28 Thread, M-LOK, Bird Cage, Black Nitride Finish, XTS-CU-10CE

Tiger Rock Complete Upper Receiver, AR-15, 5.56 NATO, 16in Carbine Length, 1-8 Twist w/10in M-LOK Handguard, Black, Large, UB15-10ML

Aero Precision M4E1 Complete Upper Receiver, AR-15, 10.5 in Rifle Length Barrel, 9 in M-LOK Handguard, No BCH/CH, Magpul Cerakote, Flat Dark Earth, APAR640222M2

Aero Precision M4E1 Complete Upper Receiver, AR-15, 5.56x45mm NATO, 16 in Mid Length Barrel, 12 in Quad Rail Handguard, No BCG/CH, Anodized, Black, APAR640231Q7

Luth-AR Complete Upper Receiver Assembly, .223, 29In, 20In, Bull, Rifle, 1X9, 1/2X28, Picatinny, Key MOD, A2 Flash Hider, Anodized, Manganese Phosphate, Silver/ Black, FTBL-B20

Luth-AR Complete Upper Receiver Assembly, .223, 26In, 16In, Bull, Carbine, 1X9, 1/2X28, Picatinny, Key MOD, A2 Flash Hider, Anodized, Manganese Phosphate, Silver/ Black, FTBL-B16

Aero Precision AR15 Complete Upper, 16in 5.56 M4 Carbine Barrel W/ Pinned FSB, M4 Handguard ,Includes BCG & CH, Anodized Black, APAR505721

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

TRYBE Defense Magnite AR-15 .300 BLK 16in Complete Upper Receiver, Carbine Length, 1-8, 5/8X24, Black, UPPER16300-V2

Aero Precision M4E1 Upper Receiver, AR-15, 5.56x45mm NATO, 7 in M-LOK Handguard, No BCG/Charging Handle, Magpul Cerakote, Flat Dark Earth, APAR640212M0

Rainier Arms Rellim Arms AR-15 Take Down Upper Receiver Assembly Combo, Black, RA-TDURA-COMBO

Tiger Rock Complete Upper Receiver, AR-15, 5.56 NATO, 7in Pistol Length, 1-8 Twist, W/ 4in Super Slim Hanguard, Black, Large, UB15-P7-FSM04

Next Level Armament NLX556 AR15 556 Nato 16in Complete Upper Receiver, Midlength, 1-7 Twist, Black, NLX302

Aero Precision Complete Upper Receiver, M4E1-T, 14.5In, 5.56 Mid Barrel, 12in M-LOK ATLAS S-ONE Handguard, Flat Dark Earth, APAR700314M5

Guntec USA AR-15 .45 ACP Cal Complete Upper Receiver Combo Kit w/7.5in Barrel, Black, GT-UPPER-45-KIT-2

Aero Precision Complete Upper Receiver, M4E1-T, 20in 5.56 Rifle Length Barrel, 15in M-LOK ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700315M48

Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver, 10In, 1-7 Twist, 5/8X24 Thread, ATLAS R-ONE Handguard, Black Anodized, APAR700702M4

Moriarti AR-15 5.56 Nato M4 Carbine Diamond Cut 12in Mlok Upper Assembly, A2, Black, 16In, MAR-5.56-16-12-M4

Guntec USA AR-15 5.56 Complete Upper Receiver Combo Kit, Black, GT-UPPER-KIT

Aero Precision Complete Upper Receiver, M4E1-T, SM-15, 5.56x45mm NATO, 16In, Government, Mid Length, 1 in 7, 1/2 X 28, 15In, A2 Flash Hider, Anodized, Kodiak Brown, APAR700392M7

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

Ncstar VISM AR-10 Upper Receiver Block