blobface Posted August 21, 2013 Report Share Posted August 21, 2013 Hey Calbur20 since you fixed the magazines after they were leaking, did you come across anything inside that suggest it's possible to increase the capacity of this gun? 25 rounds makes it very unskirmishable especially even if the mags aren't too heavy, one can only carry (afford) so many... Quote Link to post Share on other sites
jkpics Posted August 21, 2013 Report Share Posted August 21, 2013 Mags are to big, I love the gun but the mags just kill it. Quote Link to post Share on other sites
sacairsoftsn00py Posted August 22, 2013 Report Share Posted August 22, 2013 I was looking into this...mag capacity was a concern....still is. Less something else comes up, next gun may be the GHK G5...or the KWA AK74U GBBR. More than likely...the AK. Quote Link to post Share on other sites
Horsem4n Posted August 22, 2013 Report Share Posted August 22, 2013 Calbur is still the only video showing that these things work just fine. even from videos posted a few days ago, they still show the gun struggling to get through a mag. either there are still plenty of the first batch at shops or VFC still hasn't fixed the mags from the factory. can anybody else confirm that their UMP works as well as Calbur's? Quote Link to post Share on other sites
blobface Posted August 22, 2013 Report Share Posted August 22, 2013 or the KWA AK74U GBBR. More than likely...the AK. Out of curiosity, why the KWA one? Quote Link to post Share on other sites
sacairsoftsn00py Posted August 22, 2013 Report Share Posted August 22, 2013 Kwa gbbs have been pretty good performers for me. Magazines held gas fine. The guns shot fine. I ran my Kriss vector pretty hard with propane from December 2012 to March. Mags held up. Only 2 occurances of jamming due to double feeding. Took about 15,000 rounds without anything breaking. I did split the load between that and my TM MP7 GBB which I modified and ran for about the same amount of bbs from December 2012 til May 2013 when I finally decided to sell my game gun toy buddy as he kept bugging me about it and it was out of stock everywhere at that time. I still had another TM MP7 GBB that was pretty much brand new in the box. My KWA LM4 ran like a champ from January 2013 til June 2013. That gun needed tweaking. Maple Leaf released the evo 2 kit which I installed (I think sometime February this year ) and it has ran with zero issues. Never an issue on the field. Yup. I have a lot of faith in a lot of KWA gbbs. Sent from my Samsung Galaxy S4 using Tapatalk 2 Quote Link to post Share on other sites
blobface Posted August 22, 2013 Report Share Posted August 22, 2013 (edited) Ah ic, I have the Kriss too, not sure how much you've looked into it, but I chose the GHK over KWA for the AK, mainly because for practically the same price (and much cheaper mags), the GHK is a great performing gun, not to mention full steel LCT body, and has good recoil, where as the KWA AK has almost no steel at all, and very little kick out of all AK GBBs (WE, GHK, KWA). It's very resilient to cool down, might be worth looking into. *wish it wouldn't show the whole video box, sorry for small thread jacking. Edited August 22, 2013 by blobface Quote Link to post Share on other sites
calbur20 Posted August 22, 2013 Author Report Share Posted August 22, 2013 There's a metal rod at the end of the magazine that restricts the amount of BB's you can stuff in it. When you sort out your mags when it starts leaking (it will do that, believe me) you can take it out when you take out the baseplate. Increases capacity to 30. 1 Quote Link to post Share on other sites
blobface Posted August 22, 2013 Report Share Posted August 22, 2013 Ic... so not too significant increase How's your UMP doing so far? Still breathing? Quote Link to post Share on other sites
rusTORK Posted August 22, 2013 Report Share Posted August 22, 2013 My small review of VFC UMP45 GBB (russian language! 69 pics): http://airsoftgun.ru/phpBB/viewtopic.php?f=137&t=135906 Quote Link to post Share on other sites
Paul202 Posted August 23, 2013 Report Share Posted August 23, 2013 I was looking into this...mag capacity was a concern....still is. Less something else comes up, next gun may be the GHK G5...or the KWA AK74U GBBR. More than likely...the AK.Get the best of both worlds in a GHK AK. Just make sure you get a 2013 model, previous models sucked. Back on topic, has anybody tried to test the reliabilty of the gun? I've always wanted a UMP and this looks like a promising choice. However I have read mixed reviews, some people saying that they are a POS while others claim that they're amazing. If they are really that good then it might just be worth saving up for one. 1 Quote Link to post Share on other sites
calbur20 Posted August 31, 2013 Author Report Share Posted August 31, 2013 Ic... so not too significant increase How's your UMP doing so far? Still breathing? Yes. But to be fair, my brother and I own like 8 other GBBRs so it doesn't used as much. I rotate gun usage depending on my mood. 1 Quote Link to post Share on other sites
steelfallenangel Posted September 26, 2013 Report Share Posted September 26, 2013 So what I'm gathering from everything here is that for those of us that aren't as technically minded we should wait to see how VFC improves the reliability of this UMP before purchasing unless we ready to start gluing down internal components down. Quote Link to post Share on other sites
calbur20 Posted September 27, 2013 Author Report Share Posted September 27, 2013 Renegadecow is plugging up two of my four magazines. To be honest, the problem with this particular gun is the mag, particularly how it's designed. All of my magazines leak, and are beyond my capability to seal, that's why I tossed (the first batch) to him. Quote Link to post Share on other sites
renegadecow Posted October 2, 2013 Report Share Posted October 2, 2013 THE MAGS ARE BANANAS! Quote Link to post Share on other sites
blobface Posted October 19, 2013 Report Share Posted October 19, 2013 THE MAGS ARE BANANAS! How did you seal them at the end? Quote Link to post Share on other sites
renegadecow Posted October 20, 2013 Report Share Posted October 20, 2013 I sealed the bottom first with that latex based sealant I've been using only to have them blow their tops. The way the mag is constructed is an extruded aluminum body with the top plugged with the valve mechanism and the bottom a plate. The big problem was VFC insisting in using a cheap *albatross* gasket design (top and bottom) instead of making a proper plug with an o-ring. Quote Link to post Share on other sites
blobface Posted October 20, 2013 Report Share Posted October 20, 2013 Do you think you can braze / solder the gaps instead of relying on their crappy seals? Quote Link to post Share on other sites
renegadecow Posted October 26, 2013 Report Share Posted October 26, 2013 Probably could since they're both aluminum. However the feed spring and feed guide (plastic) need to be installed first before both ends come together and I can't think of a way to protect either pieces from the heat. Either way, just plugging it up with gratuitous amounts of sealant seems to work. Quote Link to post Share on other sites
sacairsoftsn00py Posted October 31, 2013 Report Share Posted October 31, 2013 Get the best of both worlds in a GHK AK. Just make sure you get a 2013 model, previous models sucked. I have checked out the old versions. Left a bad taste in my mouth. After doing research...I pulled the trigger on getting myself a ghk g5. The gun is pretty dang awesome I picked up another one. These guns might have just renewed my faith in ghk. The hop is pretty good....recoil and action is awesome. Did run into an issue with the bolt catch not locking back on empty at times...fixed that issue by bending the bolt catch arm. I also tweaked the magazine feed lips so they loaded easier. Kinda wished I picked one of these g5's sooner but oh well...I scored two brand new ones for a good price Picked up the KWA AK74M when it came out. Gun is a fantastic shooter. -------------- Between the ghk g5 and vfc ump, which has better recoil (with the recoil set to heavy on the ump)? How's the range/accuracy on the ump vs. the g5? Will the ump run on 134a? Just curious as I really would like to avoid leaky mags. Sent from my Nexus 7 using Tapatalk Quote Link to post Share on other sites
calbur20 Posted November 18, 2013 Author Report Share Posted November 18, 2013 (edited) Alright, after sorting out the issues with my UMP (mags fixed by RenegadeCow, replaced the pants hop-up rubber with a new one) I finally took it out on an extended game weekend (Saturday Sunday games).The gun is a boss. With the new hopup, it was doing 100 feet shots easy, though there were shots were the BBs underhopped. Overall the gun performed well. Without an optic attached to it, it was amazingly light, lighter than a G5 which allowed me to run farther and faster compared to when I was using my WE ACR. One thing with the mags though that unless you take out the metal spacer on the bottom of the magazine when you disassemble the gun, you can only put at most like 18 rounds in there. Without the spacer, I was able to cram around 30 rounds in there. Between the ghk g5 and vfc ump, which has better recoil (with the recoil set to heavy on the ump)? How's the range/accuracy on the ump vs. the g5?Will the ump run on 134a? Just curious as I really would like to avoid leaky mags.Sent from my Nexus 7 using Tapatalk The G5 has a better hop out of the box, although it does overhop on lighter BBs. My UMP had hop problems from day one, which was solved after RenegadeCow reprofiled the hop arm and when I replaced the hop rubber with a new one. I've seen videos of people running the UMP using 134a, though your problem won't be the gas, it's the gas router on top of the magazine and the magazine itself (check RC's comments in this thread). Some say that VFC has fixed that issue with newer versions of the mag, but to be sure you would want to stock up on new gas routes that's available from WGC. The recoil is pretty hard, much more than the G5 (I have both). In fact, the recoil of the gun actually shattered a repro doctor sight that I have while I was trying to zero it, an optic that has gone on multiple gas guns (WE M14, WE AK PMC) without issues. I'm scared to put another airsoft optic on it for that very reason. Edited November 18, 2013 by calbur20 1 Quote Link to post Share on other sites
Horsem4n Posted November 18, 2013 Report Share Posted November 18, 2013 The "correct" number of rounds for the ump is 25 rounds. It confused me when i found out as its quite a huge magazine. VFC purposly made the limiter to only 25 rounds with the idea that anyone who wanted full capacity could remove it. Quote Link to post Share on other sites
calbur20 Posted November 18, 2013 Author Report Share Posted November 18, 2013 Yes sorry, I had to edit something and it escaped me. The thing is that even with the metal spacer removed, it's difficult to cram enough rounds in there. Difficult, but not impossible. If you really tried hard, you could probably get 30 rounds in, but most times it's just 25. Last time I tried to fill it to the full 30 rounds I broke the stem of my speed loader. The magazine is a single stack design, which might explain my difficulty in loading it. Quote Link to post Share on other sites
blobface Posted January 2, 2014 Report Share Posted January 2, 2014 I finally got one, got it off Bunnyworkshop and they did it for a pretty good price including the top rail and suppressor, they also offered to fix all the mags for me upon purchasing them... but I am genuinely surprised by the performance, kicks super hard for such a small gun, even with the valve release set forward, wonder how well it'd work in the cold when I get back to the UK though, but all in all, I'm really happy with it so far. Quote Link to post Share on other sites
sacairsoftsn00py Posted January 2, 2014 Report Share Posted January 2, 2014 I want a new toy for the year...back to considering this one...hmm... How hard is it to load the mags compared to the g5? Sent from my iPad using Tapatalk Quote Link to post Share on other sites
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