HRPF Classic mag
All Black ULE RT custom
Use different barrels & HPA ACI tanks
None , maybe metal rear portion to the feed tube.
External vel adj
Built like a tank, see below
Plastic external parts (sites)
Gun worked good, not as good as my old style pgp, but was a decent replacement. At first I was jacked about the new plastic slide / site end piece made it easy to reload etc. The optic sites were also great, untill my kids broke them. I figured no problem I'LL call crossman & get replacements. Sadly their customer service wasnt the best & what hurt worse was the fact that they had no replacements & per the service rep had no plans on producing any more parts whats so ever for the markers.
Good gun overall, out of production so replacment parts will become a premium. Giving it a 7 due to the plasticky bits breaking & not being able to get it fixed.