I use a 3-9x rifle scope on my M4. However my M4 can reach out and hit people at well over 250 feet. I mostly keep the scope on 4x like an ACOG, it has a very nice eye relief to allow for this, but for spotting/stubborn players who wont move, its very handy for me to have the extra magnification to really thread some shots through small spaces.
Theres exceptions, my M4 would be one, others, they really have no use other than for spotting.
Draw aggressively, shoot decisively, holster reluctantly.
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