BRP Semi Auto Bolt Assembly less original bolt head and drilled striker / firing pin wedge.
Also includes mainspring.
This is updated version is similar to the previous version with the following added features:
- Built-In Hammer Overtravel Stop
- Removable Rear Extension
The ejector and firing pin are unchanged from the second pattern.
Striker Wedge Drill size .1660" (size 19)
Includes all parts except for the original bolt head and drilled firing pin wedge.