Help ID an aftermarkeet on/off please

[Aegis]

Got screwed on Ebay, ended up with a basket case. Found this in the on/off and wondering if anyone knows what it is.

Edit - found it, does this look like a Z-valve?

Thanks

Brian

[Tsunamip8ntphreak]

Yep, That's a Z-reactor valve. I bought one in 2001, I wasn't impressed by it too much.

[BlackVCG]

Garbage on/off. Get a stock on/off and you'll be set.

[Aegis]

Thanks guys. Just finished reading up on it in the old posts, lots of "Don't buy". Aired the gun up and it was scary, going back to stock ASAP.