I have to admit I figured this would be a one and done thing for me. I threw a old redfield red dot/ laser combo on it. Got it sighted in and its friggin cool. only 25 bb's per load and it uses 2 co2 canisters. At 75 rounds its still going strong.
It looks and feels like a real AR-15 says the grip is a standard ar grip. The butt stock is proprietary but perfectly functional nice rail on top.
I hope the aftermarket steps up with a bb feeder so you can load up 200+ rounds at a time and a HPA adapter is made for it. It has some recoil because its blow back has a charging handle.
It is louder than a supressed 22lr no where near as loud as my airforce condor 25 cal HPA air gun.
Not sure how far it will stretch out. I was shooting at -+ 10 yards. and the BURRRRRRRRRRTTT of full auto is worth it lol.
I had a very simplified version some 35-40 years ago. It was sold designed to run on a can of freon. I rigged up a (bulky) compressed air tank and fittings to replace the freon can.