mnmc10 Posted July 3, 2011 Report Share Posted July 3, 2011 (edited) http://tw.myblog.yahoo.com/frogman-myblog/article?mid=10305&prev=-1&next=10263 so a flaw has been found and was corrected. i just checked my m4 and it doesnt do that. the nozzle is jsut the right length and doesnt push the bb pass the hop nub. Edited July 3, 2011 by mnmc10 Quote Link to post Share on other sites
danielsilva Posted July 3, 2011 Report Share Posted July 3, 2011 I've seen that but i believe is more to correct some problems in full auto ? Quote Link to post Share on other sites
1st Commando Posted July 9, 2011 Report Share Posted July 9, 2011 I experienced issues with my hop on my M16-A1. the first couple of shots the hop was fine but after a burst or more single shots the hop started having no effect . I shaved of about half a mm off the front of the nozzle . This seems to have solved the issue as it appears the nozzle was forcing the BB past the hop nub when it returned to battery under recoil Quote Link to post Share on other sites
danielsilva Posted July 9, 2011 Report Share Posted July 9, 2011 I experienced issues with my hop on my M16-A1. the first couple of shots the hop was fine but after a burst or more single shots the hop started having no effect . I shaved of about half a mm off the front of the nozzle . This seems to have solved the issue as it appears the nozzle was forcing the BB past the hop nub when it returned to battery under recoil Yup that's it, http://tw.myblog.yahoo.com/frogman-myblog/article?mid=10305 Quote Link to post Share on other sites
Reppyboyo Posted July 9, 2011 Report Share Posted July 9, 2011 Hmmm might have to try that on my G39 as I get the same no hop at full auto problem. Quote Link to post Share on other sites
Bamse Posted July 11, 2011 Report Share Posted July 11, 2011 After finally been able to test the damn thing after I installed my OB-kit on my M4 I really just have to say; wow. Straight as an arrow and quite awesome reach. After setting sighs I'm able to get repeated multiple hits on 70m, with like one flyer/dipper out of 15-20 shots. But (there's always a goddamn but with WE it seems ;PPP), suddenly I'm only able to get like 25 shots out of a CO2 capsule ... not even one goddamn magazine :/ With CB-kit I could often get two magazines worth of pewpew per capsule and even tho OB seems a bit more thirsty for propellant this is ridiculous ;P The ROF is quite slower compared when it had the CB-kit, and it's almost as if the bolt has some trouble seating in it's forward position when the nozzle travels over the magazine seal. Any tips&tricks here? Quote Link to post Share on other sites
danielsilva Posted July 11, 2011 Report Share Posted July 11, 2011 Just wear and tear, after a while the rubber seal will fit fine. I usually just make sure the seal is well lubricated. But its weird that you're getting less ROF, my OB had a higher ROF than my CB guns ... Have you only used co2 ? Quote Link to post Share on other sites
kojak Posted July 11, 2011 Report Share Posted July 11, 2011 I noticed the same thing with CO2--every mag still had rounds left when the capsule was empty when I used to get two full loads with gas left over. Thought it was just the last of my mags springing leaks. I'm also seeing far more fliers on auto. Quote Link to post Share on other sites
Bamse Posted July 11, 2011 Report Share Posted July 11, 2011 daniel: roger that, ill make sure to get some more bb's through it and see what happens. thx. The only mags I have are co2, no gg/propane at all. Quote Link to post Share on other sites
mnmc10 Posted July 12, 2011 Report Share Posted July 12, 2011 okay, so im still having a hard time setting my hop. either it overhops or there is no hop at all. its up to a point that the bbs just dribble out of the barrel when i point the rifle towrds the ground. my theory is that the arm doesnt go up or reset to its off position. so you screw the grub in till you get hop then when it overhops a little and you turn the screw outwards the arm is still pushing down. unlike in the g36 or pdw the hop dial has a slot where the arm goes in so when you turn the dial off the arm goes with it. or in the WA platform there is a spring that pushes the arm to counter the hop dial. the ob hop assembly has very little space for a spring mod. was thinking of making a new arm that can accomodate a tiny spring which pushes the arm to off position. for those who are having problems what do you guys think what causes it? also after a few mags my rifle will purge some gas out the ejection port. when it does that the bb just spits infront of me. i managed to fix it by adding more lube but i refuse to accept that problem since my g36c doesnt do that at all. im a bit ###### of my m4 now and is clueless on how to fix it. i dont think its an issue with gas and bbs i use cause i took out my g36, loaded it with the same gas and bbs and it fired well. oh and btw i already did the mod, i shortened the nozzle a bit and it didnt improved anything. Quote Link to post Share on other sites
1st Commando Posted July 12, 2011 Report Share Posted July 12, 2011 you may find there is an extra oring on the hop arm which is causing it to stick mate Quote Link to post Share on other sites
mnmc10 Posted July 12, 2011 Report Share Posted July 12, 2011 you may find there is an extra oring on the hop arm which is causing it to stick mate thanks mate! but i believe i was the first one here to discover that extra oring. i left one oring in it and i also checked the pressure the oring gave to the arm. even compared it to my g36's arm. they have about the same tension. so i think its not the oring the causes the sticking. but still thanks for the suggestion and i badly need a few more suggestions cause my rifle is driving me nuts already. Quote Link to post Share on other sites
1st Commando Posted July 12, 2011 Report Share Posted July 12, 2011 oops sorry mate Quote Link to post Share on other sites
ManMarin3 Posted July 12, 2011 Report Share Posted July 12, 2011 are you firing on semi/ full auto and what temperature are you in, the only times i have had similar with my SCAR was when a BB got lodged above the nozzle, although it does sound like the main O-ring drying out thru cooldown and seizing, what lube do you use on it? Quote Link to post Share on other sites
mnmc10 Posted July 13, 2011 Report Share Posted July 13, 2011 it was around 27deg C yesterday and yeah the gun purges and spits bbs when the assembly freezes or if it needs lubing. im on semi only with 2 seconds interval per shot, no full autos yet till i figure what causes the hop problem. Quote Link to post Share on other sites
Jimbud Posted July 17, 2011 Report Share Posted July 17, 2011 I just got an open bolt CQBR. I am lost as to how you remove the return spring from the nozzle and how you would get the nozzle apart in order to replace the valve with a NPAS valve. Can anybody out there can shed a little light on the subject? Thanks Quote Link to post Share on other sites
kruck Posted July 17, 2011 Report Share Posted July 17, 2011 I'll take some pictures in the daylight tomorrow if you still need them. But in words, there is a pin about halfway down the bolt, push it out from the ridged side - this is what holds in the return spring. The guide on the left of the bolt just lifts out. Unscrew the latch thingy on the top (the flat head screw) and then take out the guide from beneath that, then the loading nozzle will slide out as the guides aren't holding it in any more. Then there is a tiny little pin that holds the two halves of the loading nozzle together, and the other end of the return spring, push that out, it doesn't take much force, then pull the two halves apart. Whole process takes maybe five minutes. Apologies if anything doesn't make sense, sleep deprivation. Quote Link to post Share on other sites
Jimbud Posted July 17, 2011 Report Share Posted July 17, 2011 Thanks! It was that tiny pin in the nozzle that was giving me the problem. Assumed somthing like that had to be there just could not spot it. Quote Link to post Share on other sites
KaXXeN Posted August 1, 2011 Report Share Posted August 1, 2011 Hello New here and new to these gbb's Where do people buy the nozzles for we m4 open bolt? been googling like nuts but been unable to find any nozzles except open bolt kits. Quote Link to post Share on other sites
Bamse Posted August 1, 2011 Report Share Posted August 1, 2011 http://www.bbdragon.com.tw/product_info.php/products_id/2607 bought my open bolt set from CWI. shipped pretty fast and to a very decent price Quote Link to post Share on other sites
KaRcop Posted August 11, 2011 Report Share Posted August 11, 2011 My Open Bolt kit should be arriving tomorrow - very excited! Now every one of my guns will be gas powered and will use VSR-style hopup! :-p Quote Link to post Share on other sites
Corrigan Posted August 18, 2011 Report Share Posted August 18, 2011 (edited) What's the reliability of the open bolt version like (if I were to buy one new today)? Are there any obvious upgrades that should be done? What about performance-wise? Edited August 18, 2011 by Corrigan Quote Link to post Share on other sites
mrk Posted August 19, 2011 Report Share Posted August 19, 2011 Does the current OB version M4's have correct Colt markings on the receiver? And does the M4 OB magazines fit in redi-mag? Quote Link to post Share on other sites
kullwarrior Posted August 19, 2011 Report Share Posted August 19, 2011 Does the current OB version M4's have correct Colt markings on the receiver? And does the M4 OB magazines fit in redi-mag? WE NEVER EVER EVER EVER HAVE TRADE MARK ON THEIR GUN Those ones you see with real trademark (except EBR) are all AFC Custom Quote Link to post Share on other sites
carabinero Posted August 19, 2011 Report Share Posted August 19, 2011 Hi there, I was having fun with my WE Colt M4 CQB-R Open Bolt but now I'm having some issues Every 20 rounds or so BB's get crushed and the bolt can't seat fully because BB's debris clog the fake bolt locking slots around the chamber. I've never had this issue before with my G39 using the same brand of BB's ( 0.25 Goldenballs ). I think that the cause is how the magazine ( original ) fits in the new OB lower receiver, it has a lot of play back and forth so the magazine tilts a little bit against the chamber not giving an horizontal interface or somehow it gives a non ideal alignment with the chamber's feeding ramp ( my old 4168 had a very tight magazine fit maybe these new OB guns have indeed new molds ). The magazine lips have marks of the feeding ramp hitting it, so this may be a sign. I haven't seen in the forums something like this, if somebody knows anything about it I'll thank your feedback... Quote Link to post Share on other sites
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