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, FDE Cerakote, APAR502506M3

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 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, Anodized Black, APAR502503M3

Tiger Rock Complete Upper Receiver, AR-15, 5.56 NATO, 10in Carbine Length, 1-8 Twist W/ 10in M-LOK Handguard, Black, Large, UB15-P10-10ML

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

Moriarti Complete Upper Receiver, AR-15, 5.56 Nato, 16 Inch Barrel, M4, Carbine Length, 1X7 Twist, 1/2X28 Thread, M-LOK Handguard, Triport, Hardcoat Anodized, Black, MAR-556-16-15-TRI

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

Aero Precision AR-15 Complete Upper Receiver, 5.56, Carbine Length, 16 Inch Barrel W/Pinned FSB, Magpul MOE SL Handguard, A2 Flash Hider, Anodized Black, APAR502505M64

AIM Sports Inc Complete AR Pistol Upper Receiver W/ BCG, 5.56 NATO, 10.5in Barrel, M4 Profile, Carbine, 1-8 Twist, 1/2X28 Thread, 10M-LOK Free Float Handguard, A2 Birdcage Flash Hider, Nitride, Black, AR5CUB8

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 M4E1 Complete Upper Receiver, AR-15, 5.56x45mm NATO, 14.5 in Mid Length Barrel, 12 in Quad Rail Handguard, No BCG/CH, Magpul Cerakote, Flat Dark Earth, APAR640232Q5

Aero Precision M4E1 Complete Upper Receiver, AR-15, 18 in Rifle Length Barrel, 15 in M-LOK Handguard, No BCH/CH, Anodized, Black, APAR640251M8

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 AR15 Complete Upper Receiver, 16in 5.56 Carbine Barrel W/ Pinned Front Sight Base, M4 Handguard, Black, APAR505621

Tiger Rock AR-15 Complete Upper Receiver, 5.56Mm, 24In, 16in Barrel, M4, Carbine, 1X8 Twist, 1/2X28 Thread, 10in Quad Rail Handguard, Brake, Nitride, Anodized, Black, UB15-FAR10-FEC

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

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, Magpul Cerakote, Flat Dark Earth, APAR640232M7

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

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 Complete Upper M4E1-E .223 Wylde 18in Mid-Length EQ15 Anodized Black APAR600251Q73

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

Tiger Rock Complete Upper Receiver, AR-15, 5.56 NATO, 7in Pistol Length, 1-8 Twist, W/ 7in Super Slim M-LOK Handguard, Black, Large, UB15-P7-FSSM07

HIPP Customs Complete Upper Receiver 25.5in 16in Barrel 1-7 Twist Hipp Lite Weight Handguard Black/Orange 16.0in HC15UPRORG

ABC RIFLE COMPANY AR-15 7.62x39mm 5in Barrel Custom 5in Top Cut Custom M-LOK Handguard Complete Micro Pistol Upper Receiver W/BCG And Charging Handle, Sniper Grey, UA762B-BR5-TCML5-SG

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

ABC RIFLE COMPANY AR-15 .223 5.56 Complete Build 16in Barrel 15in Lightweight Hybrid M-LOK Handguard Upper Receiver, 1-10 Twist, 1/2X28, A2 Style Muzzle Brake, Nitride, White, UA15-TCML15-STW

Aero Precision M4E1 Complete Upper Receiver, AR-15, 10.5 in Rifle Length Barrel, 9 in Quad Rail Handguard, No BCH/CH, Magpul Cerakote, Flat Dark Earth, APAR640222Q2

Luth-AR Mark 12 Complete Upper Barrel Receiver Assembly, 5.56 Mm, 27In, 18In, Government, Rifle, 1X9, 1/2X28, Picatinny,Key MOD, A2 Flash Hider, Anodized, Manganese Phosphate, Black, BAA3-M12

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

Luth-AR A3 Complete Upper Receiver Assembled, 11.5In, Government Profile Barrel, 5.56Mm, 1-7 Twist, 1/2 X 28 Thread, A2 Flash Hider, W/ F Marked FSB And 2-Piece CAR Style Handguard, Black, BA-F11-7

TRYBE Defense Complete Upper Receiver, AR-15, 5.56x45mm NATO, 16in 5R Barrel, 1-7 Twist, 15in M-LOK Rail, A2 Flash Hider, BCG And CH, Nitride Black, UPPER16556

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

Luth-AR 11.5 in Light Weight Complete Upper Barrel Receiver Assembly - 5.56 1X7 Twist, M-Lok Free Float Handguard, Black, 11.5, ba-11-7m

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