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jkpics

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Posts posted by jkpics

  1. The OB trigger box have a reinforced valve pin delay lever, the small spring loaded part on the side that pops put, the CB part broke some times and WE upgradede it, but they had to drill out the box a bit to fit it.

     

    It functions 100% the same, so if the CB part don't break it will run fine in a OB gun.

  2. Sorry 6.5mm, misremembered that, well you get a better result if you clamp a new upper and lower together at do it, but it's really fine, 0.2mm over the 3cm wide pin channel is nothing, RS AR's are loose as F BTW, that is just inherent in the design.

  3. The receiver holes shrink a bit do to the coloring treatment, run a 10mm HHS drill true them by hand and they are fine, the real problem is that WE sells the loose uppers and lowers straight from anodizing and they really need a going over with a drill and the lower needs the fake pins installed, the upper needs a 10mm drill and I think a 2.5mm for the pin hole for the force feeder.

     

    And anodizing is a biatch to get the same from batch to batch, only the really high volume RS gun makers gets it perfect, like Colt and FN, but if you buy a complete upper it woulkd most likely not match your lower perfectly, if upper and lower needs to match 100% (OCD much) you need to paint them like the Haley JACK rifle.

  4. I like that RA-Tech keeps the roller barring on top of the gas piston, IMHO it helps the bolt running straight in the upper and buffer tube, not saying that a nice upper and bolt would have problems other vice but we are talking WE and unless you replace everything it will have some sloppy tolerances.

     

    And no matter witch bolt you get keep the plastic nozzle, the nozzle retention design just can't handle the extra weight.

  5. Ok, cut the o-ring and it's a cylinder, now take the diameter of that cylinder lets say it's 1mm, for the outerdiameter of a o-ring you have the cylinder diameter 2 times, and in the middle you have the inner diameter of the o-ring, lets say that the inner diamerter is 10mm

     

    So first we have the 1mm o-ring cylinder, then we have the hole in the middle of the o-ring thats 10mm and last another 1mm o-ring cylinder.

     

     

       o-ring  +    ID  +   o-ring  = OD 

    So 1mm + 10mm + 1mm = 12mm

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