5.56x45mm NATO Upper Receivers

TROY SPC M4A3 CARBINE RIA 5.56 14.5IN BBL FORGED UPPER 12.5" SOCC MFT Stock BLK

TROY AR-15 A3S UPPER RECEIVER ASSEMBLY 5.56 11.5IN BBL 10.5IN GEN2 SOCC HANDGUARD

Wilson Combat Upper Complete Forged 5.56 NATO Protector Mid-Length 16in Round Q-Comp 1-8 Twist Black Black

PSA 20" CHF 1:7 A2 Rifle Length 5.56 NATO Premium AR-15 Upper Assembly - No BCG/CH

PSA 10.5" CHF 1:7 A2 Carbine 5.56 NATO Premium Classic AR-15 Upper Assembly - No BCG/CH

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

Moriarti AR-15 5.56 NATO Modular Pistol Upper Assembly 6 in Black Anodized

OP Exclusive Moriarti AR-15 Upper Receiver Assembly 5.56x45mm NATO 10.5in Carbine Government M-LOK 1-7 Twist 1/2x28 Diamond Cut Free-Float Handgrd

Moriarti AR-15 5.56/.223 16in Carbine Upper Assembly Black 25.25in

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

SIG SAUER MCX-Spear LT 11.5in M4/AR Conversion Kit Black

SIG SAUER MCX AR-15 5.56x45mm NATO Caliber Exchange Kit 9in Black

Moriarti AR-15 5mm NATO 5 inch Upper Receiver Medium Micro Length 1-5 Twist 1/2x28 A2 Flash Hider Nitride

Moriarti Upper Receiver with Flash Hider AR-15 5.56 Nato 10.5 inch Barrel Government Contour Carbine Length 1x7 Twist 1/2X28 Thread M-LOK Handguard A2

Moriarti AR-15 5.56/.223 MLok Upper Assembly Shroud MLok Black 7.5in

Moriarti AR-15 5.56/.223 Stainless Steel Diamond Fluted Tactical Upper Assembly Black 20in

Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly Black 21in

Moriarti AR-15 5.56/.223 13.9in Carbine Upper Assembly w/ Pencil Profile Black 28.15in

Moriarti AR-15 5.56/.223 7.5in Pistol Shark Mlok Upper Assembly Black 16.5in

OP Exclusive Moriarti AR-15 Upper Receiver Assembly 5.56x45mm NATO 10.5in Carbine Government M-LOK 1-7 1/2x28 Diamond Cut Free-Float Handgrd Slanted

Sig Sauer Cal-X Kit SIGMCX 5.56 NATO 11.5" Tapered Lug CALX-MCX-11B-556-TAP

Sig Sauer MCX 5.56 NATO 16" M-LOK AR Conversion Upper Receiver w/Tapered Lug UAMCX-16B-556-TAP

Sig Sauer MCX 5.56 NATO 11.5" M-LOK AR Conversion Upper Receiver w/Tapered Lug UAMCX-11B-556-TAP

APF Armory 5.56 Nato Carbine 2.0 Complete Upper Receiver Armor Black