I am not married to "mil Spec" I am not shooting burst or full auto.I am not pushing the gun that hard.
But I want the most for my money. If you want to put some lowers away for a rainy day the last thing you need is to find out years later is your "bargin" lower is out of speck in some small way
Pin hole miss aligned, mag well slightly over or under size or angeled funny, too much or too little room in the trigger area
Stag is an outstanding product for the price. Is LMT better? Perhaps but it is not in the same price and avaliblity ballpark curently.
I think the right-hand Stag lowers are mil-spec. The Double Star lowers advertise they are mil-spec, but the cheaper "Superior Arms" doesn't sound like it is in the advertisement.
Parts don't often break, but mil-spec means most parts will interchange. Maybe ALL parts will interchange. I guess your match rifles are not mil-spec, as they have very close tolerances.
You don't save so much in labor when you put one together, you save because an assembled one is usually much more than $25 over a unassembled one. Generally, the assembled one comes with a pistol grip, which contains a small, tricky spring/detent that works with the safety, and the stock/buffer, which also contains a small tricky spring/detent to hold the takedown pin. Loosen that stock carelessly, and it will fly to some place God did not mean it to be, and you'll never find the spring. You can, of course, buy assembled lowers without the stock, buffer, and trigger guard, but with the rest of the parts already there, but I haven't seen them lately.
The "Superior Arms" lower said it had a "set screw" in the pistol grip for trigger adjustment. Somehow, I think this is the safety detent, but I don't know.
