It's been probably 15 years since I even SHOT one of the things. Now I figure I'd better build one (IF I can still find the parts). My question: Is there a difference in lowers between a 5.56 standard lower and a 7.62x39 or 6.8mm SPC other than the caliber markings on the side????
Probably a dumb question, but still need to find out.
Thanks in advance for any help. From looking at the guides on building one, I shouldn't have any problem (except getting the parts before I die of old age)