G3 failure to lock-up?

[clown714]

took my fairly new G3(CIA) to the range yesterday.

1st shot bang,2nd shot click.

happened with 4 different mags and different ammo.

upon further examination,looks like the bolt carrier is about 1/4''
from locking up the rollers.

note:all 1st shots were charged by slapping the charging handle down.

G3's are new to me,so I,was curious if there was a quick fix(new springs,lube,etc.)

thanks

clown

 

[HSMITH]

Send it back if the chamber is clean and it still acts like that. It sounds like the headspace is very tight. CAI guns are not known for proper fitting. I would advise when buying a gun like the G3 or any of the HK types to take some feeler guages with you. Over at the FALFiles there was a checkout procedure for them and what to look for when selecting one. A search should turn it up. Good luck!

 

[armoredman]

Century has a REALLY bad habit of grinding the back of the bolt in the G3/CETME guns to make them "in spec" again with respect to the bolt gap. You might have a ground bolt, and it's causing hate and discontent. Take her to a good gunsmith, and let them play with your CIA reweld.
Had a CETME - was POS.

 

[entropy]

Here's a link that might help you. www.cetmerifles.com Any mechanical problems like your G3 has will be answered there. First thing to do is field strip it, Gunscrubber the S**T out of it, paying particular attn. to the chamber flutes. Reassemble and check headspace with feeler gauges. (Specs are posted at the site, as is a .pdf manual for the G3.) If, out of spec, you will probably need to replace the rollers with a different size. Perro Del Diablo and the gang on the site will steer you in the right direction!