I’ll write this blog as the biggest non-expert on the topic, I know what POF and AR18s are like in comparison to LWRC guns but after that, I have no idea what all of these new piston guns from Ruger, Adams and other are like internally. It’ll take awhile to have to go through the specifications on them or a tall coffee and a couple hours of watching Youtube video clips. Some of the reviews are really well done, but takes almost as long to find a good review about a product as it does to comprehend all of the minor differences. I;ll never forget the time it took me to realize that the terms “hook and loop” closure meant velcro on shirts.
The Metallurgy in making bolt carriers, and barrels has changed so dramatically in the last 7yrs, that I seriously need a refresher course before I can even talk about firearm differences. We have a huge number of backorders for the Adams Upper receivers but I have not had the time to actually take one out and compare it to my LWRC stuff. I think the only thing I can say about the less expensive piston guns is that the designs may be similar, but I would have to say if saving $300 on an upper for a proven design means saving anything.