I have been wondering for a little while about fixed front sight bases. I was issued a rifle/carbine with one throughout my military career, and most issued LE rifles/carbines I've seen also have fixed FSB's.
I don't know why, but I just don't like them. It seems most companies are still selling a majority of AR-15 style uppers with fixed FSB's. I mean, try buying a BCM upper with no rail/handguard and a low-pro gas block... you can't.
I bet a majority of us desirous of free floating handguards immediately swap those FSB's out for a low pro block, which is sorta a pain in the ass.
Am I missing some awesome benefit of the fixed FSB? It's an unnecessary snag hazard, gets in the field of view of most optics (whether that bothers you or not is a different story), and limits rail options when a low-pro gas block does not.
With modern optics and their reliability regaling BUIS to almost an afterthought for some of us, it seems like the need for a front sight always in our face would be even less. I've never felt unprepared even with my cheapo plastic Magpul flip up BUIS. If I was really worried about it, I'd buy nicer, metal ones and really not feel unprepared.
Not really trying to start an argument, just wondering what's up with people's thoughts on the subject.