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King Arms M4 / M16 Metal Hop Up Chamber
by Andrew H. Date Added: June 12, 2008
Hands down best Hop Up assembly made to date... The "extra" features built into this unit make it a step up from the rest. The barrel lock, actually LOCKS the barrel in place for a change, with minimal, if NO barrel twist at all. Use an H-Hop Up Bucking, and a good quality Hop-up Rubber (Systema, or Prometheus), and it'll shoot straighter and truer than you've ever imagined!

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