Which billet lowers meet the following criteria

[AR-10]

I'm trying to find an AR-15 lower with some particular features:

- 7075-T6

- Integrated trigger guard

- Threaded bolt catch pin

ETA: I spoke with someone at Quentin Defense and they are using 6061-T6, so that counts them out.

[goteron]

Why the 7075-T6 requirement?

[reiswigt]

Tactical Innovation, Seekins Gen II and the Mega lowers are. The Seekins has an ambi bolt release and you can get the Mega that way as well.

[AR-10]

I called Mega and was told that only the billet receivers with ambi controls come with a threaded pin, the standard billet lower takes a roll pin.

This is not for one of my own builds, I am simply finding all of the parts needed to build it into a complete rifle - the guy that is putting it together wants a 7075-T6 receiver that he can build without a hammer or punches.

It's looking like such a product does not currently exist so he's gonna have to live with an alternative.

[reiswigt]

I missed the threaded bolt catch pin. Tactial Innovations have roll pins.

[sdoperator]

I called Mega and was told that only the billet receivers with ambi controls come with a threaded pin, the standard billet lower takes a roll pin.

So what's the problem?
http://www.rainierarms.com/?page=shop/detail&product_id=2539
This one is meant to pair with Mega's uppers specifically:
http://www.rainierarms.com/?page=shop/detail&product_id=2538

[mdashoot]

The Spikes Tactical Biohazard would be good but you cant just buy the lower, its a combo upper/lower