SIG 80% P320 FRAME (SIG SAUER CHASSIS) *MANUAL SAFETY CUT

Sig Sauer 80% Universal Insert (JSD MUP-1) is Compatible with the Sig Sauer P320 multi caliber/frame modular weapons system with a manual safety.  Allowing you to build subcompact, compact, carry, and full framed firearms all using the same modular chassis across multiple calibers.

*This chassis has a pre-milled manual safety cut for M17 compatibility.