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ntrain546
03-08-10, 19:12
Are the internals on the 6721 the same as the 6920? Bolt carrier, Buffer, Extractor spring, sight base etc.
Belmont31R
03-08-10, 19:56
The one I bought was the same sans the barrel and roll mark is different.
MarkG
03-09-10, 07:24
Are the internals on the 6721 the same as the 6920? Bolt carrier, Buffer, Extractor spring, sight base etc.

Identical twins....
Frens
03-09-10, 07:44
only the barrel (twist & profile) and the rollmarks on the receiver are different