settings on tp555's gas block?

[mstarling]

Fellas,

Can't remember right now ... is the H on the block for hi flow or high velocity (supersonic)?

Thanks,

Mike

[Fritzcat]

Mine is H-M-C, High (velocity), Medium (sub-sonic), and Closed (single shot)

[mstarling]

Thank you. Got an e-mail from tp555 shortly after I posted. Wanted to make sure ... would be a very unfortunate thing to screw up!

[tp555]

I am using H, L, C. The H is High pressure,restricted hole.Standard is .078" unless you ask for special or your barrel has a small gas hole like .062" which is the std hole for 223.I have made it .050" for some.The L is low pressure or wide open.Pin hole is 1/8".Your barrel gas port hole does the job.The C is closed.Easy enough.Progression from closed to low than high.