I am a Crosman 180 nut. A couple of guns I was able to improve with the help of Mac1 products... This 180 was converted to bulk-fill with one of Tim's 8" tube extensions. Shooting at low power, I can get close to 200 shots with a good fill.
The top 180 is that fill adaptor a Mac1 part? I have a couple Unknown adaptors and they only screw on so far?
Octavio, that is a "new old stock" Sears barrel I got from Numrich. Has scope grooves in front of the breech. These were available for a while, they finally sold out.