The SR free float rail base ring assembly contains everything you need to attach the KWA SR rails to your KM4 AEG. In this brand new package, you can customize your KM4 to fit your own style of play, whether it’s with the SR7, SR10, or SR12 free float rails (sold separately). Pick up a kit at this special price while they last!
1x Free Float Rail Base, Part 537
1x Free Float Rail Barrel Ring, Part 538
1x Free Float Rail Knurled Handguard Ring, Part 539
2x Rail Alignment Pins, Part 541
8x Free Float Rail Base Screws, Part 553