gus88

I’ve used an HAO rail on both my 10.5” and 14.6”, also on my long 416, really good quality, very well made and not as expensive 
 
on my 10.5” barrel Mk16 I used the 9.3” HAO rail (sorry about crap quality pic) 

Let's be honest, if you were attempting to run a professional site, how hard would it be to have some laminated sheets at a permanent chrono point for immediate reference, along with a selection of proven weight, decent quality bb's & one each of most platform mags.
I never get why most sites call people to a hastily prepared chrono, usually balanced on the edge of a makeshift range, & usually manned by one lone Marshall while all the other Marshall's stand together in the safezone swapping war stories & generally doing feck all 🤬

I’ve went from the gen3 to gen4, defo feels  better put together, better tolerances, Nicer kick. I’ve only been able to plink with it but defo has plenty or range and good accuracy. Overall an improvement I’d say