GTA

PCP - HPA - C02 Gate => QB-7X Gate -W/Co2 & HPA => : August 24, 2007, 02:37:08 PM

: Just got my first QB 78
: August 24, 2007, 02:37:08 PM
Seems to be a nice solid gun. I had it all apart today to check it out and to do a few mods. So far I have only one issue with this gun. The set screw that holds the barrel and the one that keeps the bolt handle tight seem to be a bastard size. Neither metric or standard. Any one else had this problem?
: RE: Just got my first QB 78
: jonny1o1 August 25, 2007, 01:23:05 AM
doesnt the gun come with the allen key?
and will you be posting chorny numbers of your valve doc?
: RE: Just got my first QB 78
: leftcoast1 August 25, 2007, 02:23:30 AM
I like them as well. I like them so much I bought one converted to PCP. I like the weight and the feel of the gun. :)
: RE: Just got my first QB 78
: August 25, 2007, 12:06:27 PM
Nope, no key came with this gun. I have several sets in both metric and standard but none fit.

Not finished testing my modded valve yet.
: RE: Just got my first QB 78
: jonny1o1 August 25, 2007, 12:53:33 PM
doc, assuming you got it from dan, id say shoot and email his way and ask what size i is or ask if he has any for you
: RE: Just got my first QB 78
: August 25, 2007, 10:51:10 PM




It's a standard M5 metric Allen screw so a 3mm Allen key should fit. When I have one where I can't get a key to fit I gently grind down three sides of a slightly larger Allen key until it fits.



Jon

: Thanks Jon,,,,,
: August 25, 2007, 11:49:38 PM
,,, grinding 3 sides is a new trick to me. I will have to give it a try.
: RE: Just got my first QB 78
: August 26, 2007, 01:43:04 AM
Portland Jon - 8/26/2007  3:51 AM



 



It's a standard M5 metric Allen screw so a 3mm Allen key should fit. When I have one where I can't get a key to fit I gently grind down three sides of a slightly larger Allen key until it fits.



Jon



The +/- tolerance and heat treating consistency leaves allot to be desired.  We could end up with a Chinese Whitworth set of allen keys in the end ;-).

Cheers
Mark
: RE: Just got my first QB 78
: johncedarhill August 28, 2007, 01:02:41 AM
I saw in the manual reference to a 2.5 mm hex