This Polymer80 PF-Series Rail Kit is for the PF45 Large Frame. If you’re building an 80% pistol, this kit lets you add a Picatinny rail for mounting accessories.
What’s Included
- Locking Block Rail System (LBRS)
- PF45 Rear Rail Module (RRM)
- 2 Pins
- Slide Stop Round Coil Spring
This kit is specifically designed for the PF45 Large Frame – make sure you’re ordering the correct kit for your frame. Adding a rail gives you options for lights, optics, or vertical grips, useful for home defense, getting ready for hunting season, or hitting the range.
Important Note: Please check current Pennsylvania laws regarding 80% frames and associated parts before ordering.
We are a Pennsylvania FFL dealer and ship to Pennsylvania addresses. All firearm-related parts require a valid PA purchase permit or are shipped to a licensed FFL holder within the state. We also handle FFL transfers; contact us for details and associated fees.





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