04-15-2011, 07:38 PM
The point being, when the bolt strips a round and it moves forward and upward. If it doesn't go upward enough, it can run into the flat area of the receiver just below where the barrel extension ramps begin. By extending those ramps lower, into the receiver, it reduces the chance of that collision causing the round to jam. As to whether it is a bigger factor in the Grendel, I can not say. It's one of those options that has all the positives and little if any negatives. So if it is available, get it.
Hoot
Hoot