New to NWFA and wanted to say hello. I am starting a new AR/300 Blackout build in a short while. Bought all the parts with an 80% aluminum lower and will be milling it out soon. I also got an extra 80% poly lower but not sure what I will do with that. To top it all off the other night I ordered a "Specter" 80% Glock 17 gen3 lower and am planning on putting (as soon as I can find one at a good price) G22 upper in .40 with a .357 sig extra barrel, on that. After I do the milling on that one.