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View Full Version : settings on tp555's gas block?


mstarling
12-25-2009, 06:37 PM
Fellas,

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

Thanks,

Mike

Fritzcat
12-25-2009, 09:26 PM
Mine is H-M-C, High (velocity), Medium (sub-sonic), and Closed (single shot)

mstarling
12-26-2009, 02:01 AM
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
12-26-2009, 07:07 AM
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.