The RM4 and VM4 one-piece upper receiver fits all KWA RM4, VM4, and Ronin Tactical Series rifles, including the original Magpul PTS ERGs. (Not compatible...
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!
Contents:
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
The KWA KM4 and RM4 Series semi-tightbore 425mm 6.05mm brass inner barrel is made of the highest quality material and is meticulously crafted to precise specifications. With this inner barrel, you can customize your KM4 or RM4 Series rifle to reach out and touch the competition.
Although this barrel is the stock inner barrel for the KM4 SR10, it can be used in any KM4 or RM4 Series rifle! Customize your KM4 or RM4 with our large selection of rail systems and outer barrels. The possibilities are endless!
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