FME, a vsr is a good bet (try for TM if you can). Then upgrade the barrel, piston, cylinder head (or do the appropriate compression mods). Heavy, high quality bb's are a must... So barrel +compression for accuracy.
For 210-300 feet, I think you're going to need a bit more than 300$, if you want to hit it consistently.
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AIRSOFT PRECISION DYNAMICS - Augmenting Reality
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