Bushmaster's Bolt Carrier Converter? or SP1 spec carriers???

[Typhoon]

I noticed bushmaster sells a Bolt Carrier Converter now...

If you had a AR15 carrier with this, it would probably still be an AR15 carrier and not m16? (legally)

Also, the "straight through" carriers that colt produces now, i wanted if these converters could be milled down to work on those, and make them LL compatible.

I have not seen deviced to "clamp on" carriers like this until now, but i have heard of them.


Out of my curiosity, does anyone know of an "SP1 Spec" carrier that works with the RLL? I mean, any carrier that will trip an RLL. Or should I just get get a regular AR15 carrier and mill it down to .650 and put a slight bevel? I would feel more comfortable if someone could point me to an SP1 carrier, please? (or spec) I don't feel like buying another SP1, as I would like the RLL in my newer colt or a bushy.

Thanks,
-Typhoon