Quoted:
DPG,
I own both GGG and Bushy front sights. The bushy is in my 'junk/spare parts box', I have two GGGs in use.
One difference is that the GGG is configured such that when folded down, the top of the sight does not protrude beyond the actual sight base. With the Bushy, I had to mount it 'backwards' (so that it folds forwards) to avoid interference with my FF tube.
The other difference is more objective. The GGG stuff just feels more 'solid', better built. It's one of those things that's hard to describe without actually handling them.
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I had the same comments, and have handled both which is why I didn't buy the Bushy unit, and did so because of the very same reasons Slash mentioned. You simply have to handle both to appreciate the difference. The BMAS front BUIS, IMO, is in the same boat when compared to the GG&G, KAC, or ARMS unit (features aside). The quality of the BMAS units, while not shabby, just don't seem to subjectively equal that of the other units. However, I point out that is subjective. Others I know who have handled all the units share the same opinion. Part of that is why the price is so different between the units. I sold off my other BMAS accessories as well - they were nice, but I found nicer replacements. Yankee Hill Manufacturing (YHM) actually makes those pieces for Bushmaster, and they do fairly good work, I think it's a matter of design that separates them from the rest essentially.
You may be well serviced by the BMAS units, but there are better units out there - it's a matter of price and preference.
I have NO experience with the DPMS unit, looks nice enough though.