Originally Posted by
taekwondopreacher
Slight necropost, but specific to this thread. Has anyone else had NP3 BCGs "dry out" after normal firing schedules, particularly noticable when first cycling the action the next time.you use the rifle/carbine?
I have an 18" rifle length gas upper with a Sionics BCG. It seems like if I go shoot it a bit, the BCG gets "chaulky", and takes more force than normal to cycle manually the first few times after i grab it again. I eventually solve this problem by throwing a few drops of oil on the BCG before throwing it back in the safe each time. I noticed the same thing on a 16 inch mid-length using a NP3 carrier with parkerized bolt (carrier and bolt from Sionics). I'll check with my buddy who has a very similar 18" running a Sionics NP3 BCG. But I never get this with standard finishes on the BCG. It seems like the gas rings are getting dried out.
My theory as of now is that the slicker finish sheds oil faster, but the doesn't make all that much sense to me since the gas rings should be affected the same. What say you?