AR 1912 Pressure Relief Valve Kit

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

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

Guntec USA AR-15 Complete 5.56 Upper Receiver W/O Lower Parts Kit, N.5, 15in Ultralight Series M-Lok Handguard, MLS Gen 2 Stock Assembly, Carbine Length, .750 Gas Block, 16in 5.56mm M4 4150 Barrel, 1-

OP Exclusive Moriarti AR-15 Upper Receiver, 300 Blackout, 10.5In, Pistol, Medium, M-LOK, 1-7 Twist, 5/8X24 Thread, Diamond Cut Free-Float Handguard, Slanted Muzzle Brake, Sniper Grey MAR-10-300-PENTA

Guntec USA AR-15 5.56 Upper Receiver W/O Lower Parts kit,n.2,15in Ultralight M-LOK Handguard,MLS Gen 2 Stock Assembly,Carbine ,.750 Gas block,16in 5.56mm M4 4150 Barrel,1-7 Twist, FDE, AR556-KIT-2

Stag Arms AR-15 A3 Flattop Upper Receiver Assembly, Direct Impingement, Left Hand, Cerakote, FDE, STAG310864

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

Guntec USA AR Complete .308 Upper Receiver W/O Lower Parts Kit, N.1, 15in M-Lok Handguard, .308 Gen 2 M.L.S. Stock Assembly, Mid-Length, .750 Gas Block, 16in M4 4150 Barrel, 1-10 Twist, 5/8X24 A2 Bird

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

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

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

Guntec USA AR-15 Enhanced Lower Parts Kit W/ Upgrades, Anodized Blue, LPK-ENH-BLUE

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

Guntec USA AR-15 Stripped Billet Upper Receiver 15 in Air Lite Series M-LOK Handguard Combo Set, Anodized Purple, GT-UP-SET-PURPLE-15AIRLITE

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

Stag Arms AR-10 Tactical Right Hand Upper Receiver, 308 Win, 16in Barrel, TAC-GOV-CMV Profile, 1-10 Twist, 5/8X24 Thread, VG6 Gamma, FDE, STAG10101242

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

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

Guntec USA AR-15 Lower Parts Kit, No Fire Control Group Grip, LPK-NFCG

Aero Precision M4E1 Complete Upper Receiver, AR-15, 10.5 in Rifle Length Barrel, 9 in M-LOK Handguard, No BCH/CH, Anodized, Black, APAR640221M2

OP Exclusive Moriarti AR-15 Upper Receiver Assembly, 5.56X45mm, 10.5In, Carbine, Government, M-LOK, 1-7, 1/2X28, Diamond Cut Free-Float Handgrd, A2 Flash Hider, Cerakote, Burnt Bronze, MAR-10-556-BB

CMC Triggers AR-15/AR-10 Trigger Group Single Stage, Small Pin, Flat, 5.5Lb Pull, Olive Drab Green, 93503ODG

Guntec USA AR-15 Enhanced Lower Parts Kit W/ Upgrades, Anodized Clear, LPK-ENH-CLEAR

Moriarti AR-15 5.56x45mm NATO Threaded Barrel, 16 Inch, M4, Carbine Length, 1-7 Twist, 1/2X28, QPQ Corrosion Resistant, Black, MAR-556-16-M4-BRL

Presma 28 Piece AR-15 Lower Parts Kit Without FCG For .223/5.56 AR15/M4, Black, LPK01

Stag Arms AR-15 A3 Flattop Upper Receiver Assembly, Direct Impingement, Type 3 Hard Coat Anodized, Right Hand, Black, STAG300412

Moriarti AR-15 5.56/.223 Mlok Upper Assembly, Shroud, Mlok, Black, 7.5In, MAR-7-556-BLK-SHR

Stag Arms AR-10 Tactical Right Hand Upper Receiver, 308 Win, 16in Barrel, TAC-GOV-CMV Profile, 1-10 Twist, 5/8X24 Thread, VG6 Gamma, Black, STAG10100342

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

Sniper AR-15 9in Pistol Tubular / Round Forend Handguard, 6061-T6 Aluminum, .223/5.56, Mid-Length, Matte Black, MFFAR9

CMC Triggers AR-15/AR-10 Trigger Group Single Stage, Small Pin, Curved, 6.5Lb Pull, Red Line, 94501RL

Rainier Arms Match Series .308 Win AR-10 Threaded Barrel 16 Inch Intermediate Length 1-10 Twist 5/8 X 24 Nitride Black Medium RAB-M-308-16-I-NF-BLK