5.56x45mm NATO Receivers

Kexuan Aluminum Receiver End Plate w/Dual Sling Clip Type Adapters for .223/5.56/.308 Buffer Tubes Purple

Kexuan Aluminum Receiver End Plate w/Dual Sling Clip Type Adapters for .223/5.56/.308 Buffer Tubes Blue

Kexuan 223/5.56/.308 Buffer Tube Receiver End Plate w/Sling Swivel Attachment Hole Black

Presma Aluminum Receiver End Plate w/ 1in Sling Adapter for .223/5.56/.308 Buffer Tubes Silver

Mk18 Stripped Socom Upper Receiver W/ Handguard Only - Mk18 Stripped Socom Upper Receiver

Ar-15 Super Duty Stripped Upper Receivers 5.56mm - Ar-15 18 Super Duty Stripped Upper Receiver Ddc

Ar-15 Super Duty Stripped Upper Receivers 5.56mm - Ar-15 18 Super Duty Stripped Upper Receiver Black

Mrp-L M-Lok 5.56mm Assembled Upper Receiver - Mrp-L M-Lok 5.56/300 Blk 9.25'''' Assembled Upper Receiver

Troy A4 Complete Upper SUPG-A4S-10BT-00, 223 Rem/556NATO, 10.5 in Barrel SUPG-A4S-10BT-00

Ar-15 Lightweight Upper Receiver W/ Slim Line Handguards - Ar-15 16'''' Lightweight Upper W/ 15'''' M-Lok Slh Rail

Ar-15 Lightweight Upper Receiver W/ Slim Line Handguards - Ar-15 16'''' Lightweight Upper W/ 12'''' M-Lok Slh Rail

5.56x45 Nato Complete Upper Receiver - Kak Forged Complete Upper, 16" 5.56 Nato Mid Gas 13" Mlok

K-Spec 5.56x45mm Nato Complete Upper Receiver - K-Spec 5.56 Nato 16'''' Bbl 1-7 Twist Complete Upper Black

SLR B15 Billet Upper 5.56 Receiver Black SLRB-15-UPP 556

AK Receiver 5.56x45- WBP Poland

WBP Forged 5.56 AKM Barrel Trunnion

WARRIOR SYSTEMS WSM15 5.56 NATO / 223 Rem Billet AR15 Receiver Set w/ Flared Mag Well | Black

DS*-15 RECVR SET STD MULTI ODG

M4 5.56 Complete Monolithic Upper Receiver Groups - M4 Le6944 Upper Group 14.5in Stripped

M4 5.56 Complete Monolithic Upper Receiver Groups - M4 Le6943 Upper Group 11.5in Stripped

M4 5.56 Complete Monolithic Upper Receiver Groups - M4 Le6945 Upper Group 10.3in Stripped

Brn-4 Assembled Upper Receivers - Brn-4 Assembled Upper Receiver 16'''' Heavy Barrel Black

Brn-4 Assembled Upper Receivers - Brn-4 Assembled Upper Receiver 10.4'''' Heavy Barrel Black

Brn-4 Assembled Upper Receivers - Brn-4 Assembled Upper Receiver 16'''' Medium Barrel Black