Just want to get the opinion of people who might have knowledge of the two uppers. I'm considering ordering one of these two and want to get your perspective. I like that the the upper from Surplus Ammo is built on the BHW barrel while the Alexander arms as a reputation for quality and attention to detail. I can't examine ether of these products before ordering so my decision will be based on what I can get out of the different forms on the net. Let me know what you think, why you think it and I'll keep an eye out for your replies.