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Stuey

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Posts posted by Stuey

  2. Tokyo Marui HK45

    in Pistols (Gas)

    Posted

    Wait so the mag is pinned but the fill valve holds...what? in?

     

    Sounds like they're well designed though, with my KWA mags the valves and screws were never very tight and they always held gas perfectly.

     

    Pinned is better for TM guns because they use soft alloy and eventually the threads will go...every time you disassemble one a fine metal powder falls out of the mag as the thread crumbles...a friend had a 226 mag explode on him after one too many disassembles, the bottom bit took a chunk out of his ceiling (my plan with my own Sig mags is never to open them). Pins are a bit of a pain but until TM start using better metal I prefer them.

  3. Tokyo Marui HK45

    in Pistols (Gas)

    Posted

    Thank you, hmm that changes it a bit for me but still might give one a shot.

     

    As for the other TM models it is a little different to the HK45 but the only Marui models that I recall without such reinforcement of the slide catch area are the Desert Eagle (not that it needs it with that mass of plastic) and the older M9s.

     

     

    Well that works for me, so long as it can be easily cared cocked and locked then all the better (wish someone would make a Taurus PT92 now, cocked and locked Beretta clone with a frame safety, yes please).

     

    'FireKnife'

     

    The Deagle could do with some strengthening, the slide catch on mine stopped working shortly before the slide itself cracked.

     

    With TM's crappy metal, pinned mags are better.

  5. VFC MP7A1 Navy GBB

    in Rifles (Gas)

    Posted · Edited by Stuey

    Nice! I know you're holding it kind of cack handed but the kick seems good! Some venting but it keeps going. I see what you mean about the recoil spring, the return from locked open is a bit lethargic. Is the hop rubber proprietary then?

    Kind of makes me want an MP7 again...

  14. GHK G5 First Impressions.

    in Rifles (Gas)

    Posted · Edited by Stuey

    Cooldown resistance on the GHK is better. On my (Properly cleaned and lubed) MP7, the nozzle is a two-part system and sticks. On the GHK, from what I can tell as it's a WA-pattern GBBR it has a one-piece nozzle. Correct me if I'm wrong on this; but it doesn't reciprocate as the bolt travels at least. I'm guessing this means there's one less point of failure.

     

    Not sure what you mean by this, and I've never handled or disassembled a TM MP7, but the G5's bolt/nozzle assembly works the same as every other GBB in that the nozzle is able to slide in and out of the bolt, and does so during cycling. The nozzle stays seated in the hop rubber momentarily when the bolt starts to recoil (so that the gas can keep flowing from the mag), and is pulled back into the bolt by the return spring just before the bolt goes all the way back.

     

    It's just a particularly well-designed gas system that performs really well.

     

    Not sure if that's what you meant?

    • Like 1

  15. Tokyo Marui M870 Tactical Gas Tri-shot Shotgun- picture, text and video review

    in Rifles (Gas)

    Posted · Edited by Stuey

    Its not so much the legislation its the actual guidelines included that carry the worrying information . Ie , that no tank containing propane should be more than 80% filled at any time , to allow for the gasses natural expansion and instill a safety margin for any containers expansion . In canada they have already banned the use / sale of the kits/ valves used to fill Airsoft mags / tanks with propane .

     

    If you just connect a propane bottle to an empty container the pressure will equalise and the flow will stop before the container is 80% full. If you do refill those Coleman tanks from a big propane bottle the flow stops when they're half or less full - if you want to fill them to the same level as when they were new, you have to chill them or manually open the blowoff valve to lower the pressure in the Coleman tank to allow more liquid propane to enter. As such, you can't fill an airsoft mag completely just by gassing it normally - which is a good job, that would be dangerous (as you said). You could potentially fill it completely if you chilled the mag beforehand, but no one does that. The current design stops filling at a safe level by itself.

     

    Also, green gas is propane so if they allow green gas in airsoft mags but ban propane that's retarded.

  18. Tokyo Marui M870 Tactical Gas Tri-shot Shotgun- picture, text and video review

    in Rifles (Gas)

    Posted

    How many mags have blown up again?

     

    Exactly...

     

    Use it per manufacturer specification...if you have problems then...contact the retailer you bought the gun from.

     

    Having issues cause you used a higher pressure gas? Who put green gas/propane in it ..you. who's to blame? Marui. Lol

     

    Sent from my Samsung Galaxy S4 using Tapatalk 2

     

    If these parts are deforming under the pressure of propane, then shame on Marui for such poor engineering. The standard rule is that a gas container should be able to withstand three times the pressure it's rated for. If the tank is meant to be used with HFC-134A, which is a little over 80PSI at typical room temperature, then it should be able to go up to 240 PSI- and that's double what propane is under typical UK/US use conditions.

     

    Deformative expansion over time can lead to structural failure and possibly kaboom. For a part to risk this at just over its specified operating pressure is extremely unimpressive.

     

    • Like 3

  19. Tokyo Marui M870 Tactical Gas Tri-shot Shotgun- picture, text and video review

    in Rifles (Gas)

    Posted · Edited by Stuey

    If these parts are deforming under the pressure of propane, then shame on Marui for such poor engineering. The standard rule is that a gas container should be able to withstand three times the pressure it's rated for. If the tank is meant to be used with HFC-134A, which is a little over 80PSI at typical room temperature, then it should be able to go up to 240 PSI- and that's double what propane is under typical UK/US use conditions.

     

    Deformative expansion over time can lead to structural failure and possibly kaboom. For a part to risk this at just over its specified operating pressure is extremely unimpressive.

     

    Thank you, this is what I was talking about with regard to safety margins. Very sloppy unsafe design.

     

    We can only hope Marui improve the design, or an aftermarket company jumps in to fill the gap.

     

    Shame, as the rest of the gun (bar the hop thing) seems really solid.

    • Like 1

  20. Tokyo Marui M870 Tactical Gas Tri-shot Shotgun- picture, text and video review

    in Rifles (Gas)

    Posted · Edited by Stuey

    Propane is so cheap, probably yes.

     

    And I know we're not just talking about the M870 but it, being NBB, shouldn't need any upgrades for propane (the exploding tanks notwithstanding). And the TM 1911, Hi-capa, 226, M9, Deagle and plenty of others are very accommodating of propane completely stock. No metal slide required (they just reduce performance).

    • Like 1

  21. Tokyo Marui M870 Tactical Gas Tri-shot Shotgun- picture, text and video review

    in Rifles (Gas)

    Posted · Edited by Stuey

    You should believe it.

     

    Japan has different laws, as Wingmann has demonstrated, i've order once or twice from Japan in the past, but that was probably 5-6yrs ago.

    One was a tanaka works pistol, magazine with valves and all was assembled.

    But with this new postal rule, will that means all gas tanks/magazines will have the same treatment?  

     

    And getting back to the point, all airsoft guns in Japan have to run on HFC134a, it has been a law for as long as i can remember, i would not even try to run my Tanaka on green gas. 

     

    But Tokyo Marui? Maruzen? They weren't legally required to be built for green gas, but they were over specced, that they could.

     

    So in conclusion, if the tank is heavily deform, you should try and get it replaced. But the manual does say use HFC134a and not above a temperature of 40C. 

     

    You probably can't deny the green gas, but you could probably claim the second, I don't see why you can;t try and get a replacement from Ehobby.

     

    But i've just had a look at my own tank and the result ain't good, it's deformed as well, it has expanded by 1-1.5mm on both sides, stemming from the middle pin, it certainly not as bad as yours but its certainly reproducible.  

     

    Although designing and speccing a gun for a certain pressure is fine, load bearing parts, especially ones containing pressurised gas (which is pretty dangerous), should have a good margin of safety. Ideally at least a factor of two. It's not really safe if pressures just slightly above the design pressure cause the tank to physically deform. What about 134 on a really hot day? Or kept in a car in direct sunlight? That's not a safe design.

     

    The 870 runs brilliantly on 134/ 144 a , from what I have seen , why has everyone got a huge desire to run stronger gases . The mp7 had problems , the 57 , and now this gun ? Yet all work well on 144a .

     

    134/144 are super expensive, especially if you use your gas guns regularly. The main reason I use propane is because it's the only gas I can afford to use in any quantity. It's more easily available.

    • Like 2

  24. Tokyo Marui M870 Tactical Gas Tri-shot Shotgun- picture, text and video review

    in Rifles (Gas)

    Posted

    I took Another thing I noticed and not sure if this is Normal. When you switch modes in between shots, does the mode change on the fly or does it change the following shot? Mine changes modes on the following shot.

     

    That's logical, surely? Once you've racked the gun you've already loaded the BBs, so moving the switch just tells it how many to load on the next racking of the action?

    • Like 2
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