This is the part you will need if you are completing an 80% kit. This is the chassis insert that holds all the FCU pieces that goes into the grip. To complete this you will need the Finishing Jig.
- Cougar Innovations 80% Chassis Insert
- Second Generation Design
- Stainless Steel Material
- Identical Tolerances to Factory Sig
- Corrosion Resistant
- JSD Machined
- No FFL Required