5.56x45mm NATO Lower Receivers

Spikes Tactical Punisher Lower/Upper Receiver Set, Semi-automatic, 223 Remington/556NATO, Cerakote Finish, Patriot Brown, Includes 9 in SAR3 Rail STS1615-PB9S

Spikes Tactical Punisher Lower/Upper Receiver Set, Semi-automatic, 223 Remington/556NATO, Cerakote Finish, Barrett Brown, Includes 13.2 in SAR3 Rail STS1615-PN3S

Spikes Tactical Gadsden Lower/Upper Receiver Set, Semi-automatic, 223 Remington/556NATO, Cerakote Finish, Magpul FDE, Includes 9 in SAR3 Rail STS1634-PM9S

Spikes Tactical Gadsden Lower/Upper Receiver Set, Semi-automatic, 223 Remington/556NATO, Cerakote Finish, Flat Dark Earth, Includes 9 in SAR3 Rail STS1634-PFD9

Spikes Tactical Gadsden Lower/Upper Receiver Set, Semi-automatic, 223 Remington/556NATO, Cerakote Finish, Coyote Tan, Includes 13.2 in SAR3 Rail STS1634-PC3S

Spikes Tactical Crusader Forged Lower/Upper Receiver Set, Semi-automatic, 223 Remington/556NATO, Cerakote Finish, Combat Grey, Includes 7 in MLOK Rail STS1622-PG7M

Spikes Tactical Calico Jack Lower/Upper Receiver Set, Semi-automatic, 223 Remington/556NATO, Cerakote Finish, Magpul Foliage Green, Includes 7 in MLOK Rail STS1616-PF7M

KE Arms Stripped Lower 1-50-01-054, Billet, 223 Rem/556NATO, Black Finish 1-50-01-054

KE Arms Complete Lower 1-50-01-075, Billet, 223 Rem/556NATO, Black Finish, With Milspec Trigger

Ballistic Advantage DCP3 BAPA100039, Stripped Lower Receiver, 223 Remington/556NATO, Anodized Finish, Black BAPA100039

Ballistic Advantage BA15 Enhanced BAPA100083, Semi-automatic, Stripped Lower Receiver, .223 Remington/556NATO, Matte Finish

ODIN WORKS OTR-15 5.56x45mm NATO Black Anodized Billet Lower (OTR-15-Billet-Lower-BLK)

Spikes Tactical STLS030 Snowflake Stripped Lower 223 Remington/556NATO BLEM

Xtreme Machine XM 15 Pistol 5.56 Nato Lower - UA1633

Strike Industries AR-15 Enhanced Lower Build Kit for .223/5.56 - Black

Lantac SF15 Forged Receiver Set

Aero Precision M4E1 Builder Set w/ 15" ATLAS R-ONE M-LOK Handguard - Chocolate Chip Camo

Aero Precision M4E1 Builder Set w/ 9.3" ATLAS S-ONE M-LOK Handguard - Chocolate Chip Camo

Aero Precision M4E1 Builder Set w/ 9.3" Enhanced M-LOK Handguard - Chocolate Chip Camo

Aero Precision M4E1 Builder Set w/ 15" ATLAS R-ONE M-LOK Handguard - OD Snakeskin

Aero Precision M4E1 Builder Set w/ Enhanced M-LOK Handguard - OD Snakeskin - 10.7"

Anderson Stripped No Logo Lower Receiver + 1000 rounds of Winchester 5.56 Ammo Bundle

Lancer Systems L15 Stripped Lower Receiver w/ Competition Magwell

Lancer Systems L15 Stripped Lower Receiver w/ Standard Magwell