SPR build front sight gas block opinion (w/pics)

[fastex500]

I am working on an SPR build and have several front gas blocks to choose from. I have a standard low profile, a railed low profile, a flip up MOD0 style and a Young Mfg billet. Here are the two FSGB's on the barrel. What do you guys think?

Young Manufacturing:

YHM Flipup (sling swivel is coming off):

 

[Pusher591]

Re: SPR build front sight gas block opinion (w/pics)

David, that looks bad-ass! I want to shoot it! I like the HK style front site, #2.