I have been thinking of building an AR. The thing is I would like to put one together in 7.62x39. I am pretty mechanically inclined - so I know I could handle the build. I know the parts are available - I can get barrels in 7.62x39 and a bolt made for 7.62x39 - the thing I don't quite understand is this:
To build the upper do I just need to get the appropriate barrel and bolt for the caliber I want - and then the upper receiver is standard? I know the lower receivers are pretty much universal (except sometimes for .308) - is the same true of the upper receivers?
Is there anything else that might not work if I was to build the rifle myself - would gas system function with the 7.62x39 caliber - would I need to play with buffer springs, etc?
The reason why I am thinking of a build vs. just buying already configured - is that getting a flat top in the 7.62x39 caliber does not seem to be easily available.
To build the upper do I just need to get the appropriate barrel and bolt for the caliber I want - and then the upper receiver is standard? I know the lower receivers are pretty much universal (except sometimes for .308) - is the same true of the upper receivers?
Is there anything else that might not work if I was to build the rifle myself - would gas system function with the 7.62x39 caliber - would I need to play with buffer springs, etc?
The reason why I am thinking of a build vs. just buying already configured - is that getting a flat top in the 7.62x39 caliber does not seem to be easily available.
