Got mine R28.
Issue:
The slide scratch the part of the outer barrel near the ejection port, leave terrible scratch marks.
The slide do not go all the way back, causing the slide catch not working. Could be caused by the increase of friction in the slide, or the magazine.
Fix (so far):
Sanded and polished the inside of the slide.
More sanding and polishing on the scratched outer barrel, then metal brushed the barrel to make it looks somehow close to the way it were.
Completely cleaned the slide assembly, reapplied grease.
Applied dry lubricant on the contacting surface of the slide and the outer barrel.
No more slide scratch now when I pull the slide. Will do a firing test later today.
Other comments:
This gun has the potential to turn me into a GBB gun doctor.
Update: did some dry firing test with propane (no BBs… don't want to shot BBs in my room). The slide catch still don't work, looks like the recoil spring is too strong. But at least the cycle is much smoother now, and the slide catch no longer catch the slide in the wrong location.
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Last edited by ccyg8774; October 11th, 2013 at 19:41..
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