ID: 41644 (VF9-HOP-M4-02)
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MAP ProtectedExempt From Coupons
Compatibility: For H&K 417 Series and compatible M4 / M16 Series Airsoft AEG Rifles
(Write a review)
"I bought this as a replacement for my Ares M4 carbine and, with minor modification to both sides of the unit, it fit quite well. I noticed an increase in both fps and accuracy.
The plastic is tough and the dial that turns the arm is very stiff and stays in place. Although $25 a hop up is expensive this is a quality hop up unit. I am satisfied, 5/5 stars.
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