Just the receiver is plastic, all of the internals are metal. They are NOT the standard Classic Army internals, they are unique to the Sportline Series. The gearbox and internals are much closer to Tokyo Marui than to the all metal Classic Army Proline Rifles. A partial list of differences:
- Sportline has plastic bushings, Proline uses metal
- Sportline has non-reinforced gearbox, unlike the Proline
- Sportline uses an aluminum cylinder and barrel, not brass
- Sportline has a plastic spring guide, not metal
- Sportline uses a newly-cut and designed mold, the Proline molds are over 5 years old now and beginning to cause minor tolerance issues (was told this by a CA representative on Thursday)
I have one that I've left stock as a back-up rifle, and it's been great. Shoots 350 out of the box, and is more than capable of competing with other rifles on the field. As always though, I'll throw in a tightbore barrel to round it out, but I'm not planning on any gearbox work for the time being. I doubt you'd be disappointed with the purchase, especially if you understand what you're getting.
