Includes:
Trigger
Trigger Spring
Hammer
Hammer Spring
A2 Grip
Buffer Retainer Pin
Buffer Retainer Spring
Trigger Guard
Safety Selector
Bolt Catch Spring
Detent Spring
Bolt Catch PlungerBolt Catch
Disconnecter
Disconnecter Spring
Magazine Catch Spring
Bolt Catch Roll Pin
Magazine Release Button
Magazine Catch
Pivot Pin
Selector Spring
Safety Selector Detent
Rear Take Down Pin
Takedown Pin Detent

Sig Sauer P320 Slide Parts Kit
ARK 2.0 Build Kit
AR 3.5 Lbs. Match Grade Single-Stage Drop-In Trigger, Flat 

