BCL( Black creek Labs) used to be NEA(North Eastern Arms, the name change was largely due to the poor quality control both in assembly and the manufacturer of parts.
While changing the name the logo and players involved are still the same. They make a number of parts in house and earlier versions had proprietary parts limiting options for upgrades.
Here is the blurb from the manufacture
They say failure is a good thing. That it drives inspiration and innovation. That to finally hit the “Mark” you must first fail, then listen, then learn, and then respond with everything you’ve got. We agree. Meet the BCL 102 MK7. ( they are now pushing version 7 in only a couple years of being on the market, see date on magazine article below which was version 1)
The BCL 102 MK7 is a standard BCL102 that has been fitted with an upper receiver that was designed with Black Creek’s mission in mind. Lighter. More accurate. More reliable. The MK7 boasts a receiver set and handguard machined to tighter tolerances and finished with a (type III class 2) hard anodize and an option for a standard or custom elite cerakote coating over the hard anodize. The MK7 barrel nut is made of hardened steel and is factory torqued to eliminate barrel shift. A DPMS thread pattern on the upper receiver and a milspec buffer tube allows for easy modification.
The MK7 Bolt has been brought back to milspec and the gas port is CNC drilled to a size that provides reliability for almost all commercial .308 ammunition. The MK7 bolt and extractor are made on an in-house
Here is a review by Canadian gun magazine
https://calibremag.ca/bcl102-review/
https://blackcreeklabs.com/wp-content/uploads/2019/07/Barrel-Alignment-Inspection.pdf
The above link has pics on pg 2 showing correct and incorrect pictures along with how to inspect for barrel alignment.