Sig Sauer P320 80% insert

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MSRP: $100.00
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80% P320 Compatible Insert - MUP 1


The Modular Universal Pistol 1 (MUP-1) is a great base for your next build.  The MUP-1 is compatible with Sig Sauer P250, Sig Sauer P320 and the EXO-1 Chassis system.  Your MUP-1 can be made into a 9mm, 40 S&W, 357 SIG and 45acp (with slight modification).  MUP-1 are all compatible with the current p320 "drop safe" upgraded parts.  


Operations Required to Finish:

  • All Holes
  • Bend Slide Rails
  • Trim Rails to Size

Jig and Tooling Sold Separately 


Compatible Firearms

  • Sig Sauer P320
  • Sig Sauer P250
  • EXO ONE (X01)

Made from 316 Stainless in the USA


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