Single Status Update
M4 Gr300 rebuilt...
Holy shiet it's loud. The stock is acting like a resonator!
Might be better after chrono and spring balance!
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Those bodies are by far the best M4 bodies ever produced.
They don't have any of the issues of later production, and I've never heard of one cracking.
The only issue is the bolt release scratching the body.
You should get yours rebuilt. Drop one of those E&C boxes into it with a basic fet and use it to confuse and upset M4 experts who will tell you off for the stock
The only thing you can do with magnesium if you want to spruce it up is paint it. I have no idea what they use the blacken it, but I would avoid the ALU black as it may eat into the metal.