Stag Arms lowers are of manufactured with specs that give nothing up to other brands other than, brand. They are constructed from Forged 7075 T6 Aluminum, with the latest Mil-Spec finish, and are beautifully machined.
Stag Arms products are cheaper in price than other brands because Stag Arms is their own 'in house' manufacturer. As a brand they are less known than others as they are still quite new, only existing as "Stag Arms" and selling AR15 rifles to civilians for the past 2-3 years. However, the company has been building AR-15 type rifles, parts and assemblies for other brand names (including the biggies) for 32+ years and are of course a US Dept of Defence approved M16/M4 overhaul and upgrade facility, so they are well up on the 'latest' specs and developments.
I am not claiming that Stag Arms lowers are 'better' than Bushmaster, but they are not worse, and the price difference is not due to cheaper materials being used or lower manufacturing quality.
Either will work fine for you.
We represent Stag Arms in Canada. Dealers should have stripped lowers in-stock in mid-January. There should be enough in country to meet demand soon.
More details will be up at
www.armseast.com, including dealer links, over the next few days (we're all eating Turkey today).
Merry Christmas,
DT