Here is a nickel plated Pro Team Products Micro Cocker that I purchased off craigslist about 4 years back. This PTP Micrococker has a Race Frame on it but the back membrane pad on the race frame has come off.
This Micrococker is one of the later versions and has the top pull pin on the body and the nickel is actually in excellent shape. Luckily it wasn’t drilled for eyes when the Race frame was put on it which will make it a spectacular example of a Micrococker to convert back to a mechanical marker.
I would guess the Micrococker dates to 1998 or 1999 and the race frame likely dates to 2000-2003 (?).
Find more articles on proteam products and microcockers at https://paintballhistory.com/tag/ptp
And more Autococker articles at https://paintballhistory.com/tag/autococker