5.56x45mm NATO Lower Receivers

Mk1 Mod 2-M Complete Pistol Lower Receiver

Primary Weapons Systems MK1 Mod 2-M Lower 5.56 NATO with BCM Stock

DPMS AR-15 B5 Bravo-C OM Grip PFT Complete Lower

Harrington & Richardson M16A2 Special Forces COTS Marked Stripped Lower, Black

Harrington & Richardson Retro M16A1 Stripped Lower Receiver, Black

Harrington & Richardson Complete Gray XM177E2 Lower, 2 Position Tube, Authentic Aluminum Stock

Harrington & Richardson M16A2 Lower Parts Kit, Gray

Spikes Tactical Spartan Set, Semi-automatic, Matching Lower/Upper Handguard Set, 223 Rem/556NATO, 10 in MLOK Rail, CNC Machined from a 7075 Billet Aluminum, Bronze Battleworn STSB610-CM1

Geissele Automatics Geissele Super Duty MOD1 5.56mm 12.5" Bbl Black SBR (NFA) 08-541B

Geissele Automatics Geissele Super Duty MOD1 5.56 NATO 10.3" Black Pistol

Ar-15 Blem Super Duty Stripped Lowers - Ar-15 Blemished Super Duty Lower 5.56mm Gray

Ar-15 Blem Super Duty Stripped Lowers - Ar-15 Blemished Super Duty Lower 5.56mm 40mm Green

Ar-15 Blem Super Duty Stripped Lowers - Ar-15 Blemished Super Duty Lower 5.56mm Black

Armaspec AR10 Gun Builders Lower Parts Kit SS/Bronze

Armaspec Superlight .223/5.56mm Lower Parts Kit SS/Bronze

Armaspec Superlight .223/5.56mm Gun Builders Kit SS/Bronze

ARMASPEC SUPERLIGHT LOWER PARTS KIT 223/556 SS/SILVER

DIAMONDBACK FIREARMS DB15 5.56 10" 30rd Pistol Black w/ GHW Brace

Battle Arms Development AR Stripped Upper/Lower Receiver Set 223 Remington/556NATO Semi-automatic

Battle Arms Development Billet Lightweight Stripped Lower

Wilson Combat Mil-Spec AR-15 Receiver Set Anodized Black

Geissele Automatics Geissele Super Duty 5.56mm NATO 10.3" Bbl Black Pistol w/BRACE 08-562LB

SigTac SigTac Complete 5.56 Lower/DMR/MatchTrggr/CTR Stk

Core 15 GTO Stripped Lower Receiver