SAR Gas Piston

[Jagdraben]

Numrich has two pistons listed for the SAR:

One, I assume, is the standard SAR piston that we're all familiar with. Link.

The other... is a bit odd. It has a triangular collar and is unthreaded... and is also listed as being both IMI and new. Link.

What's going on, here?

 

[Ugh!]

I think they are talking about the guide fins on the piston.

Take a look at CNCwarriors website they have both versions for a standard length galil.

http://www.cncwarrior.com/comersus/store/comersus_listItems.asp?idCategory=59

I think the triangular one was a later design, cheaper to manufacture.

The unthreaded part I am not sure of.

 

[Jagdraben]

I knew that CNC Warrior was making the three-lug design for ARs and ARMs. I thought that it might have been an earlier design, although now that I know what Valmet gas pistons look like, that was a little bit silly of me.

Any idea when they might have switched to the triangular design? I also wonder if it's unthreaded to save money. (And if it, then, just slides into the bolt carrier and is secured entirely via cross-pin.)

 

[coltcollector]

I have surplus kits with both type pistons.

 

[Jagdraben]

Are the triangular collar ones thread-free?