The one I am waiting to finish has an aluminum tube and steel innards.
You shouldn't have a problem with yours as I wouldn't think you'll be blasting through three or four 30 round magazines as fast as you can pull the trigger.
And, as usual, I forgot something about steel vs. aluminum. Aluminum becomes pliable at a much lower temperature than steel. Also, aluminum expands at more than twice the rate of steel when heat is applied.
“I refuse to answer that question on the grounds that I don't know the answer” ― Douglas Adams
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You shouldn't have a problem with yours as I wouldn't think you'll be blasting through three or four 30 round magazines as fast as you can pull the trigger.
And, as usual, I forgot something about steel vs. aluminum. Aluminum becomes pliable at a much lower temperature than steel. Also, aluminum expands at more than twice the rate of steel when heat is applied.
― Douglas Adams