MUP-1 80% P320 Frame (Sig Sauer® Chassis)

$99.00$110.00 (-10%)

In stock

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


This product is a EXCLUSIVE! You won’t find this product anywhere else!

SKU: SIG-P320-CHASSIS-FRAME Categories: , , , , , ,

Current Lead Time: Begins Shipping September 14th


  • Made from 316 stainless steel
  • 9mm, 40 S&W, 357 SIG, and 45acp (with slight modifications).

Steps Remaining

To finish this insert and make it ready for use, the following steps must be completed:

  • Drill all holes
  • Bend side rails
  • Trim rails to size

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MUP-1 80% P320 Frame (Sig Sauer® Chassis)

$99.00$110.00 (-10%)

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