i am getting everything ready to order a predator pursuit RRA upper and am looking at my options for flip sights. I am going to put the front sight on the gas block and notice that there are the A2 style front sight and the HK/AK style front sight. I understand that it is personal preference, but i am wanting everyones opinion. Will buy both and sell the one i dont like if needed, but would like peoples opinions who have used one or both. Thanks.