I have had a surprisingly difficult time finding the answer to this question - I love the idea of an RDB in 6.5 Grendel, but I'd prefer the lower assembly with the pistol grip instead of the non-pistol grip lower seen with the RDB-C. But every instance I can find of a 6.5 RDB is the C variant without the pistol grip.
Does anyone here know if there are or will be a 6.5 RDB with the original lower with the pistol grip? Or, if not, does anyone know if the lowers are interchangeable?
From what Chad with Keltec said in an interview all variants will be available in all forms. They also said you can simply swap out the lowers, so you can go from ban state compliant to pistol grip version with just the push of a couple pins.