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

Weight .3 lbs
Dimensions 2 × 1 × 1 in