Bead thread on Dominion Arms Grizzly?

[canadianshooter]

Hi,

Does anybody know what the thread of the bead sight is on the Dominion Arms 870 or is it just a pressure fit? Thanks.

 

[Mark_P]

I believe the bead thread is metric, so it makes it a little more difficult to change the front bead sight.

 

[canadianshooter]

Metric?

If it's a metric thread it won't fit any of the standard threads then? I was guessing it would be the common 6-48. Has anybody changed the bead in their Dominion Arms 870 yet? Is the metric thread smaller than a 6-48 and can it be tapped for replacement with a 6-48 thread?

 

[12magnum]

most beads are tapped for a 6-48 or 3-56