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G&P Full Metal One-Piece Hop Up System for M16 M4 Series Airsoft AEG
by Sinjin O. Date Added: October 11, 2008
This is by far the best hop-up I've seen. My friend bought this a few weeks back and i put it together for him. there are no instructions but its very easy to assemble. it took me about 5 min to put it all together. it also makes the M4 very accurate and increases the FPS. I recommend this hop-up for anyone who needs accuracy and velocity.

Rating: 5 of 5 Stars! [5 of 5 Stars!]
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