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ceb3
December 31, 2017, 22:01
Replaced the bolt catch.
Still does not want to keep bolt back.
Could this be telling me op rod spring needs replaced?
Finicky with magazine which I think is Korean-no markings.:confused:

FriendBesto
January 01, 2018, 02:22
Try a CMI mag before you do anything. They can be found for around $20.
I don't know of many Korean mags that are good for anything.

ArtBanks
January 01, 2018, 07:25
Plenty of possibilities.

Receiver geometry, bad bolt lock, bolt lock spring weak,mag follower out of spec.
Should not be caused by op rod spring.
Most likely is the mag follower. Even CMI have had poor followers on some mags.
Some receivers need material removed from the top of the lock opening so it can raise far enough to function properly.
You will know when you hit the right combination. Good luck.

Semper Fi
Art

maxaks
January 01, 2018, 20:46
my guess would be the mag followers. Did you try with a mag empty. Sarco has usgi followers... but if it were me I ditch the Korean and get some other alternative mags

W.E.G.
January 01, 2018, 22:37
Korean mags are guilty until proven innocent

KoKodog
January 05, 2018, 17:34
Korean mags are guilty until proven innocent

yup, ......