If i use this Surplus Ammo & Arms 7.62x39mm 16" H-BAR Profile1:10 AR-15 Barrel and this .308 DPMS Style Assembled Upper Receiver with Charging Handle would that work? and what the best gas block and bolt carrier?

also i have a spike lower multi caliber will that work fine with this build

And to answer your question, no I do not believe that would work.

And to answer your question, no I do not believe that would work.

Isnt the OAL on a /308 upper different than on a standard upper??

Yes I realized I need a standard upper but might buy a complete from model 1

 

 

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