Yes, had a G2 Razor 4.5-27x56 that the objective lense shattered.
also I had one of the first Steiner m7xi 4-28 splatter grease on the reticle.
replaced from Beretta Australia. no issues since
Punch out the roll pins on the side and take out the plungers, clean and reassemble.
Also the extractors are typically easy to move around with your finger. There's not a whole lot of tension on them without a case on the bolt.