Bbs flying left.

Chairs · February 14th, 2016, 22:43

Hey guys I recently installed a promi and polar star jack into my krytac. The nozzle on the jack looks lined up perfectly and nothing in the barrel it's squeekie clean but my bbs veer heavily to left. Like I have to aim almost a foot or two to right at 50 yards. Even had my backup m4 with e and tried swapping barrel an hop up rubber and does the same. Only thing I couldn't swap was the hop up chamber itself. Gun worked perfectly before both upgrades

RainyEyes · February 14th, 2016, 23:04

Quote:

Originally Posted by Chairs

Hey guys I recently installed a promi and polar star jack into my krytac. The nozzle on the jack looks lined up perfectly and nothing in the barrel it's squeekie clean but my bbs veer heavily to left. Like I have to aim almost a foot or two to right at 50 yards. Even had my backup m4 with e and tried swapping barrel an hop up rubber and does the same. Only thing I couldn't swap was the hop up chamber itself. Gun worked perfectly before both upgrades

So you ruled out the barrel, and hop up, what's left for you to diagnose?

Have you tried adjusting your sights? If you want your shots to go right, adjust your sights to the right.

Chairs · February 14th, 2016, 23:13

Quote:

Originally Posted by RainyEyes

So you ruled out the barrel, and hop up, what's left for you to diagnose?

Have you tried adjusting your sights? If you want your shots to go right, adjust your sights to the right.

No I mean I can curve bbs around corners.

ThunderCactus · February 14th, 2016, 23:16

Regardless of whether or not the air nozzle is misaligned to the barrel, it can't influence the direction of the BB. And you've apparently already ruled out the barrel group.
Are the BBs slicing to the left? Or is the gun shooting in a straight line, but just over to the left?
If they're slicing, it might be that your outer barrel is tilted.

If you couldn't swap the hop chamber, did you swap the nub?

Ricochet · February 14th, 2016, 23:25

It's something in the path of the BB. As stated above, it could be your barrel is bent, but that would probably cause them just to go left, not to curve left. Barrel is an obvious one, debris or damage can cause deviations. The big one is hop-up. If the hop is twisted, tilted, or the bucks nvg isn't sitting straight and even it will make them curve away from center. If all that looks good then it could be a relationship between your gun and how the barrel grouping fits in it. If say pressure is applied to one side of the Hop, it could be doing it. Perhaps it's not all sitting together right? Anyways, rebuild the hop and barrel grouping, ensuring a good airseal and that everything is clean and seated correctly, make sure your nozzle and receiver (everything that touched or comes near the barrel grouping) is seated and put together properly. Use good quality BBs and magazines as well.

Chairs · February 14th, 2016, 23:28

It's slicing left. I didn't think the hpa nozzle was the issue but I'm new and newer yet to hpa so just needed a confirmation that no its something to do with hop up. Going to flat hop it tomorrow so hopefully it was a weird cold day nub issue.

Ricochet · February 15th, 2016, 00:02

Flat hop is the way to go. Make sure your barrel is clean as a whistle and the grouping is seated properly. Hopefully it will be resolved.

AnthonyG · February 15th, 2016, 04:13

I know nothing about hpa, but I feel like the problem could be the hop-up rubber or nub. Take your barrel assembly out and look down it from the hop-up side. With the hop up on, is the protrusion into the barrel fairly even, or is it lop-sided? If its nice and even, and your barrel is straight as others have suggested, then you could probably rule out it being a hop-up issue.

In theory, If there is uneven pressure applied to the BB from one side or the other, it could spin sideways and arc as you are describing, much like a pitcher's curve ball in baseball.

Sent from my Nexus 5 using Tapatalk

Chairs · February 15th, 2016, 12:53

UPDATE! OK so threw the oem barrel back in and quadruple check make sure hop up looks even ect. Shoots straight now but the bbs for couple shots under hop then they severe over hop and then go back to under hopping with no changes in hop up dial and it's not moving

JKxWKW · February 15th, 2016, 13:58

Quote:

Originally Posted by Chairs

No I mean I can curve bbs around corners.

Like the movie Wanted?

ThunderCactus · February 15th, 2016, 14:52

Quote:

Originally Posted by Chairs

UPDATE! OK so threw the oem barrel back in and quadruple check make sure hop up looks even ect. Shoots straight now but the bbs for couple shots under hop then they severe over hop and then go back to under hopping with no changes in hop up dial and it's not moving

overhop to underhop could be a seal problem.
try chronoing it

RainyEyes · February 15th, 2016, 16:47

Quote:

Originally Posted by ThunderCactus

overhop to underhop could be a seal problem.
try chronoing it

Sounds like your hop-up rubber is too soft for the FPS you're shooting and tore after the first few shots. Chrono and let us know the results, since that's kind of important for your hop-up lol.

Chairs · February 16th, 2016, 22:55

Hop up looks fine but can't chrono atm. Having issues with broken hop up chamber from my stupidity. And of course it's a krytac and not sure if other m4 styles will fi(my ics m4 woukdnt)

etown · March 26th, 2016, 19:53

Any solution to this? I am having a very similar problem after upgrading to hpa. The only remedy I can find is using heavier bbs, and that only helps slightly.

The Legacy · March 26th, 2016, 23:30

Chairs, are you testing outside? If so, could it be the wind? I know it's extremely unlikely based on what you and others have said, but I felt like it's worth mentioning. I've noticed BB's shifting pretty hard in the right circumstances.

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February 14th, 2016, 22:43	#1
Chairs Trader rating Join Date: Aug 2015 Location: Saskatchewan	Bbs flying left. Hey guys I recently installed a promi and polar star jack into my krytac. The nozzle on the jack looks lined up perfectly and nothing in the barrel it's squeekie clean but my bbs veer heavily to left. Like I have to aim almost a foot or two to right at 50 yards. Even had my backup m4 with e and tried swapping barrel an hop up rubber and does the same. Only thing I couldn't swap was the hop up chamber itself. Gun worked perfectly before both upgrades

February 14th, 2016, 23:25	#5
Ricochet How much sand CAN you fit in your vagina!? Trader rating Join Date: Feb 2008 Location: North Delta, BC (Greater Vancouver)	It's something in the path of the BB. As stated above, it could be your barrel is bent, but that would probably cause them just to go left, not to curve left. Barrel is an obvious one, debris or damage can cause deviations. The big one is hop-up. If the hop is twisted, tilted, or the bucks nvg isn't sitting straight and even it will make them curve away from center. If all that looks good then it could be a relationship between your gun and how the barrel grouping fits in it. If say pressure is applied to one side of the Hop, it could be doing it. Perhaps it's not all sitting together right? Anyways, rebuild the hop and barrel grouping, ensuring a good airseal and that everything is clean and seated correctly, make sure your nozzle and receiver (everything that touched or comes near the barrel grouping) is seated and put together properly. Use good quality BBs and magazines as well. __________________ I have developed a new sport called Airhard. Pretty much the same as Airsoft, except you have to maintain an erection...

February 15th, 2016, 00:02	#7
Ricochet How much sand CAN you fit in your vagina!? Trader rating Join Date: Feb 2008 Location: North Delta, BC (Greater Vancouver)	Flat hop is the way to go. Make sure your barrel is clean as a whistle and the grouping is seated properly. Hopefully it will be resolved. __________________ I have developed a new sport called Airhard. Pretty much the same as Airsoft, except you have to maintain an erection...

February 14th, 2016, 23:16	#4
ThunderCactus Not Eye Safe, Pretty Boy Maximus on the field take his picture! Trader rating Join Date: Feb 2007	Regardless of whether or not the air nozzle is misaligned to the barrel, it can't influence the direction of the BB. And you've apparently already ruled out the barrel group. Are the BBs slicing to the left? Or is the gun shooting in a straight line, but just over to the left? If they're slicing, it might be that your outer barrel is tilted. If you couldn't swap the hop chamber, did you swap the nub?

February 14th, 2016, 23:28	#6
Chairs Trader rating Join Date: Aug 2015 Location: Saskatchewan	It's slicing left. I didn't think the hpa nozzle was the issue but I'm new and newer yet to hpa so just needed a confirmation that no its something to do with hop up. Going to flat hop it tomorrow so hopefully it was a weird cold day nub issue.

February 15th, 2016, 04:13	#8
AnthonyG LUser Title Trader rating Join Date: Aug 2014 Location: Pickering/Toronto	I know nothing about hpa, but I feel like the problem could be the hop-up rubber or nub. Take your barrel assembly out and look down it from the hop-up side. With the hop up on, is the protrusion into the barrel fairly even, or is it lop-sided? If its nice and even, and your barrel is straight as others have suggested, then you could probably rule out it being a hop-up issue. In theory, If there is uneven pressure applied to the BB from one side or the other, it could spin sideways and arc as you are describing, much like a pitcher's curve ball in baseball. Sent from my Nexus 5 using Tapatalk __________________ *Busy signing for his packages*

February 15th, 2016, 12:53	#9
Chairs Trader rating Join Date: Aug 2015 Location: Saskatchewan	UPDATE! OK so threw the oem barrel back in and quadruple check make sure hop up looks even ect. Shoots straight now but the bbs for couple shots under hop then they severe over hop and then go back to under hopping with no changes in hop up dial and it's not moving

February 16th, 2016, 22:55	#13
Chairs Trader rating Join Date: Aug 2015 Location: Saskatchewan	Hop up looks fine but can't chrono atm. Having issues with broken hop up chamber from my stupidity. And of course it's a krytac and not sure if other m4 styles will fi(my ics m4 woukdnt)

March 26th, 2016, 19:53	#14
etown Trader rating Join Date: Jun 2011	Any solution to this? I am having a very similar problem after upgrading to hpa. The only remedy I can find is using heavier bbs, and that only helps slightly.

March 26th, 2016, 23:30	#15
The Legacy Trader rating Join Date: Apr 2011 Location: Kingston, ON	Chairs, are you testing outside? If so, could it be the wind? I know it's extremely unlikely based on what you and others have said, but I felt like it's worth mentioning. I've noticed BB's shifting pretty hard in the right circumstances.

Bbs flying left.

Doctor's Corner