Supporters Rock-climby-Dave Posted March 5, 2010 Supporters Share Posted March 5, 2010 Ok, Who makes the best hopup unit for an M4? and how much do they cost? what are they like to live with? try and comment from personal experience of non-stock hop up units and any reviews of said unit. thanks guise Dave Link to comment Share on other sites More sharing options...
kejot Posted October 9, 2010 Share Posted October 9, 2010 got to be the madbull ultimate for me £26 from here http://www.fire-support.co.uk/product/madb...out-tracer-unit great, hop adjust on end not side and stay where you put it just dont get one with tracer unit on side, unless u gone use tracers, as its only another airleak slot Link to comment Share on other sites More sharing options...
B00ts Posted October 13, 2010 Share Posted October 13, 2010 I use the madbull hop-up in my m4 work very nicely the hop-up rubber is very thick and it doesn't move once set. my is also the tracer unit which i hook up to the 7.4v lipo i run and it works a treat with tracers bb. $65 from HK inc tracer led Link to comment Share on other sites More sharing options...
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