Personally, I purchased the mlok stock rifle.
I had to reindex and tighten the gas block, otherwise it wouldn't cycle.
Been running AMAZING ever since...
Now with the risk of banning these types of rifles, I am looking at building a second one.
To be honest, everyone who holds my rifle says it is heavy, and I agree.
The worst though is off hand shooting such as when I am hunting, or carrying the rifle through the rough.
It is VERY front heavy, which feels like the stock will slip/move on your shoulder, plus the added weight in the front makes it harder to aim while standing.
Therefore, I plan on getting a receiver set, and waiting for parts to come on sale to built one that is less front heavy. (Handguard, barrel and muzzle brake)
Maybe see if lighter BCG will also compensate for the lighter rifle, and return recoil close to stock. Mind you, it's just a 308.
I hear STAG might be working on a DPMS Gen 2 type rifle, here's hoping.