For everyone who purchased a stripped lower receiver this will allow you to complete your build.
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MFR#: 5165450351
Barrel Length: 16"
Gas System: Carbine Length
Barrel Profile: M4
Barrel Steel: 4150 Chrome-Moly Vanadium
Barrel Finish: Nitride
Chrome Lining: None
Muzzle Thread: 1/2-28
Chamber: 5.56 NATO
Twist Rate: 1:7
Barrel Extension: M4
Diameter at Gas Block: .750
Gas Block Type: F Marked Front Sight Base
Muzzle Device: A2 Flash Hider
Receiver Material: Forged 7075 T6
Receiver Type: M4
Handguard Type: PSA Classic Carbine Handguards, Black
Stock Type: PSA Classic M4 Adjustable Stock, Black
Grip Type: PSA Classic A2 Grip, Black
Bolt Carrier Group Included: Yes
Bolt Steel: 9310, Nitride
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes
Fire Control Group: PSA Mil-Spec Fire Control Group
Overall Length: 24.5"