This is a complete lower parts kit to finish out your stripped lower receiver. This LPK is for a pistol build. Includes:
 
Pistol Buffer Tube
Recoil Spring
3oz Buffer
Backplate
Castle Nut
Foam Cover
LPK Includes: 
Pistol Grip
Trigger
Hammer
Disconnector
Selector
Bolt Catch Spring
2 Detent Spring
2 Detents
Bolt Catch Buffer
Take Down Detent
Bolt Catch
Magazine Catch Spring
Bolt Catch Roll Pin
Magazine Catch Button
Magazine Catch
Front Pivot Pin
Hammer Spring
Trigger Spring
Pistol Grip Screw
Pistol Grip Lock Washer
Selector Spring
Detent Selector
Hammer Pin
Trigger Pin
Take Down Pin
Buffer Retainer Pin
Buffer Retainer Spring
Disconnector Spring
Mil-spec  
Phosphate finish