Killen Custom shows his project of turning the MCX Virtus AEG into an MCX Rattler... "This is my Custom airsoft MCX Rattler, built on a Sig Sauer Proforce/VFC MCX Virtus. I have designed all Rattler parts and CNC machined them in 6061-T6 aluminum. Most likely one of the first legit airsoft MCX Rattlers out there!"