OK, the op rod is supposed to be bent. They were all bent for proper fit at the time of manufacture/assembly. To check for proper op rod fit do the "tilt test" as follows;
1 Strip the rifle so that you have the barreled action with handguards and gas cylinder in place.
2. Remove the op rod spring and follower rod as well as the bullet guide, follower, follower arm, op rod catch, and follower arm pin.
3. Install the bolt and op rod and hold the rifle in a horizontal position, then alternatively tilt the muzzle and receiver end up to a 60 degree angle. The bolt and op rod should move freely and the bolt should fully open and close from the weight of the bolt and op rod alone. If this is the case the op rod fits properly and it should be left alone.
Bending or re-bending an op rod for correct fit is a time consuming process which requires considerable experience. The op rod does not affect timing, which is the release of the bolt at the proper time as the en bloc clip in inserted into the receiver and engages the clip latch. The proper timing of your rifle is affected by the other parts which were previously mentioned.