Rt pro or rt classic

[Shotcaller509]

How do you tell the difference between an rt pro valve, rt classic, and what if the valve just says retro valve on it. Is there any symbol or marking on any of these that signifies the difference.

[K Wolf]

How do you tell the difference between an rt pro valve, rt classic, and what if the valve just says retro valve on it. Is there any symbol or marking on any of these that signifies the difference.
Original RT valve- air comes into the valve through banjo bolt. needs original RT rail

ReTro valve (what you have)- stainless front aluminum back, air comes into valve from side fitting, fits other mag rails

Xvalve- aluminum front and back, side air fitting, fits mag rails, accepts ult without modification