[Myrddin]

The 6.8 SPC maintained the 2.26" COL that fits in an AR-15 magazine well. The 277 Fury is too long to use the standard AR-15 lower and the 80,000 PSI chamber pressure is too high for a stock AR-15 barrel (typically 55,000 PSI). The bigger, higher pressure 277 Fury has no place to go without a new line of lower/uppers/barrels.

I never purchased any 6.8 SPC or SPCII uppers. There was a difference in the bolt face and chamber between SPC/SPCII. I think the 6.5 Grendel had a similar problem on barrels and bolt faces. I did build/buy 6.5 Grendel rifles.

[Red Badger]

It’s all about the Benjamins......................