Evike.com shows a feature of the KWA Ronin Series, their complete upper swapability in this video presentation... "KWA is proud to announce their newest line of Airsoft AEGs, the Ronin series of AEGs. Designed from years of feedback from loyal customers, the Ronin series of AEGs now feature modular, interchangeable upper receivers, allowing the user to use any upper in the Ronin series, on any Ronin lower. One lower, a multitude of possibilities. Depending on which Ronin model you choose, the Ronin upper receivers feature either Keymod or M-lok compatible rails, allowing for use with most popular accessories on the market.

Externally the Ronin series features enlarged trigger guards, ambidextrous fire controls to improve weapon manipulation, as well as a custom mock suppressor for a more aggressive look as well as a PTS Enhanced Polymer Grip and PTS flip up back up sights.

The Ronins aren't just window dressed, the external upgrades are only over shadowed by the internal upgrades that KWA had outfitted the Ronin with. One piece rotary hop up, reinforced radiused grearbox and switch life extender ensure that the Ronin series of AEGs will continue to perform reliably in even the worst of conditions."