g3pb high flow on/off top ?

[nuclear zombie]

http://www.g3pb.com/

It's in the catalogue section under automag.

Who makes this ? and is it any good ?
It looks that in theory it should work better ,but theory and real world are two different things.

BTW: I don't really plan on buying one, I just saw it on their site and was curious.

[Hopalong]

It looks similar to an old stock on-off top. Most aftermarket tops, aside from being worthless, are SS, not brass.

[GT]

Originally posted by Hopalong
It looks similar to an old stock on-off top. Most aftermarket tops, aside from being worthless, are SS, not brass.

one on my buddies old mag was SS. It was very very ported and the top of the on/off finally caved in and caused some velocity issues.

jb

[BlackVCG]

The theory and the real world empirical data show that "high flow" on/off tops make no difference because there are flow restrictions before the on/off that determine the volumetric flow rate of the air through the system.

[GT]

Originally posted by BlackVCG
The theory and the real world empirical data show that "high flow" on/off tops make no difference because there are flow restrictions before the on/off that determine the volumetric flow rate of the air through the system.

true,
However if thier surface becomes concave the on/off decrease flow the volumetric eff takes a poop.

jb