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					Originally Posted by kel  How many years on the market and the only relevant changes made is to rechamber the weapon for a different round? Was it that perfect the first time?
 Here, I have a new question.
 
 Why is the Ak47/74 less accurate then AR-15 type rifles.
 
 If they are both machined well and fire quality ammunition shouldn't the performance be about the same.
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 The AR-15s does not use a piston; gas blows back through a very small tube straight onto the bolt carrier. This eliminates the movement of the piston inside the rifle increases accuracy. 
