One of our clients has gotten the ATF to approve this configuration. With an A2 Buffer Tube it almost makes an SBR unnecessary. Not only does this only have one tax stamp for the Silencer but it has an amazing scope designed specifically for the 300 Blackout. Of course if you want a forward grip you have to add another tax stamp that would be included with the an SBR version.
The Burris Eliminator Gen 2 laser scope is around $800. It allows for adjustments to the Laser range and puts the LED dot where the bullet impact will be. We have heard that it is “wicked accurate.”.