[archy]

In addition to the auto sear, the design of the selector lever, hammer,disconnector and bolt carrier differ from the one in the commercial AR-15.

Yes. But not so with the so-called *Lightning Link* two-piece sear trip, which converts a semiauto AR-15 to Full-auto only, without any change to M16/M16A1 parts.

[DMZFrank]

Interesting. I am M-16 armorer qualified, but I admit to being unfamiliar with the device of which you speak. Can you provide details and/or links please?