Nice quality - Aero Precision AR15 Carbine Buffer Kit

seems really well built. Definitely raised my opinion on Aero. I like how they milled the threads in a way that the stock can collapse all the way to the plate. The spring is quite difficult to get around the collar of the buffer, but they both do their jobs just fine once you get it on there. The buffer itself is not stamped heavy with an H, but using this on a 300 blackout build it doesn't seem to need it. I swapped it out with an H buffer I have from my Colt 5.56 and it did not like it. Misfeeds just about every round. So the 300 blackout round seems to like standard buffers, just a heads up!