Model 1 300 Fireball thread pitch - Quarterbore's Forums

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Model 1 300 Fireball thread pitch

#14

12-19-2009, 10:32 PM

TCCrewchief76 TCCrewchief76 is offline

Senior Member

Join Date: Apr 2009

Posts: 178

Quote:

Originally Posted by AfricanJerry

I bought a M1S 300 fireball upper this month and 5/8 24 is now the standard thread pitch on them. They are also sending them out with a .123 gas port hole size standard.

How's that barrel shooting for you? I'm interested, and ready to buy a barrel. I'm going to be using subsonic ammo only.

Regards,

Kevin

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