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Get your Premium OEM Quality 80% Sig P320 MUP–1 Frame Insert NOW
We have the Best Premium OEM Quality Sig MUP-1 Insert that you can get anyplace hands down
Features:
- Made from the best 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