[Skruface]

http://www.intrudershop.com/show_pro...?idproduct=705

I've been watching this item for some time. Originally I thought you needed to attach it to the piston itself; it seems that's not the case. You do need to chop up you mechbox, though. You also "need" the Guarder Aluminum Piston Head and Polycarb Piston .

It doesn't say in the instructions, but I *think" the little hooked "beaver-tail" thingy at the back of the bolt carrier fits through the mechbox and slides into the back of the piston between the spring coils. I'm curious as to how it doesn't hit the spring guide, though.

Luckily, Guarder is offering pre-modified TM mechboxes.
http://www.intrudershop.com/show_pro...?idproduct=722

Here's some info on how it works:



Also, it seems like the new Guarder conversion kits now include the "auto-back bolt carrier" as a standard item:
http://www.intrudershop.com/show_pro...?idproduct=717

Retailers? We (we as in ME) need some of these....