80% Sig P320 Compatible Insert - JSD MUP 1 80% Insert

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Your Price: $99.99
Retail Price:$149.99
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JSD Supply 80 Percent Sig Sauer P320 Compatible Insert - 80% Modular Universal Pistol Insert. Use this 80% FCU to finish your home gun build from the ground up with only the best quality parts. Made in the USA out of high quality 316 Stainless Steel for long lasting quality and durable dependability. You can use this insert to build a custom Sig P320, P250, and can be used with the EXO-1 Chassis System. To finish this insert you'd need to drill all necessary holes, bend the slide rails, and trim the slide rails to the proper size. You can easily do this at home with the use of the jig and tooling, sold separately, and a drill or drill press and a hydraulic press. Use the drill or drill press to finish the holes on each side of the FCU and use the hydraulic press to bend the slide rails, then trim them to size with a file or hand Dremel. Check your local and state regulations for ownership of 80% frames and receivers.
Part Number: 80SJSD-RAW
Availability: Out of Stock.
JSD Supply 80 Percent Sig Sauer P320 Compatible Insert - 80% Modular Universal Pistol Insert.  Use this 80% FCU to finish your home gun build from the ground up with only the best quality parts.  Made in the USA out of high quality 316 Stainless Steel for long lasting quality and durable dependability.  You can use this insert to build a custom Sig P320, P250, and can be used with the EXO-1 Chassis System.  To finish this insert you'd need to drill all necessary holes, bend the slide rails, and trim the slide rails to the proper size.  You can easily do this at home with the use of the jig and tooling, sold separately, and a drill or drill press and a hydraulic press.  Use the drill or drill press to finish the holes on each side of the FCU and use the hydraulic press to bend the slide rails, then trim them to size with a file or hand Dremel.  Check your local and state regulations for ownership of 80% frames and receivers.

JSD Supply 80 Percent Sig Sauer P320 Compatible Insert - 80% Modular Universal Pistol Insert Features:


  • Made out of USA high quality 316 Stainless Steel
  • Raw finish
  • 80% finished receiver
  • To complete into a firearm, the following operations need to be finished:
    • Drill all holes
    • Bend slide rails
    • Trim slide rails to the proper size
  • This insert is compatible with the following calibers:
    • 9mm Luger
    • .40 S&W
    • .357 SIG
    • .45 ACP
  • It is compatible with the following handguns:
    • Sig Sauer P320
    • Sig Sauer P250
    • EXO-1 Chassis Systems (XO1)
  • Can be used with all P320 drop safe upgraded parts
*Note:  Returns will not be accepted once the receiver is modified in any way.  All warranty issues will be solved with the help of the manufacturer.

*Note:  We cannot ship 80% products to the state of New Jersey

Watch the instructional YouTube video to see how to complete your 80% insert here:  80% Sig P320 Compatible Insert & Jig Video

Read the PDF instructions here:  80% Sig P320 Compatible Insert & Jig Instructions

Instructional YouTube for small parts insert:  80% Sig P320 Compatible Insert Assembly for Small Parts

Other Parts Needed to Complete A Sig P320 Compatible Build: