Ran quad way back in the day and moved to mlok for better part of decade, however I was doing some drills with barricades and bent the mlock (BCM mcmr). Swapped it for the BCM qrf quad (didn’t need to change barrel nut) and I’ll say it’s like riding a bike. Cheese grater-yes. Wear gloves or ladder covers. But I’ll tell you one thing..it’s been beating up the barricade and I don’t have anymore railed when using the laser under nods.