GM IBS rear sight

[Wayne Lundstrom]

Can anyone tell me if the green mountain IBS barrels have a rear sight which is mounted via machine screws like the TC's or are they dovetailed?
Thanks !

 

[Hud]

They are mounted with screws, just like the T/C.

 

[Wayne Lundstrom]

Thanks !

 

[sabretech]

Both models of IBS (slow and fast twist) use rear sights that are attached by screws, even though they use different rear sights.