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demoncase

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Posts posted by demoncase

  2. Knife Pics

    in Off-topic Pictures

    Posted

    I like the tanto one....and so many Spydercos...

    It's a one of my rarer, discontinued models- it's a Bob Lum Tanto with the harder to find PVD coating...It's a really nice knife.

     

    My favourites are probably the Police and the Civilian.

  5. Revolver Picture Thread

    in Weapons

    Posted

    Revolvers you say?

     

    Tanaka goodness through and through: all with real wood grips (because it's just right for a wheelgun)

    IMAG2300_zpsddbc86b5.jpg

    From the left:

    M10 Midnight Blue finish

    SAA 5.5" Heavyweight detachable cylinder model

    M19 Heavyweight

    Python

    M49 Bodyguard

    M29

    IMAG2295_zpsa4e174e9.jpg[/url]

  10. Revolver Picture Thread

    in Weapons

    Posted

    I suppose this really belongs in the News subforum, but I'm interested in hearing revolver shooters' opinions. Behold, the Iron Airsoft Chiappa Rhino 200DS (black, 2" barrel). Limited edition of 100 examples, all aluminium, and features a working 'cocked' indicator pin, too, but they want a scarcely believable $700. What do we think?

     

     

     

     

     

     

    Gas in grip makes me sad inside.....This'll be Marushin shooting at Inokatsu prices.

    Really, really needed a Tanaka PEGASUS system's 'guts' in that cylinder.

     

    Apart from that- Let's hope it's heavy enough to cosh-into-unconsciouness any weeaboo in the safezone who goes "OMFG- dats a Mateba jus' like Ghost In Dur Shell" ;)

  15. Historic Loadout Pics

    in Kit & Loadouts

    Posted

    Marine Force Recon- circa 1971....

    IMAG1657_zps80020cd2.jpg
    IMAG1658_zps571d1e79.jpg
    And a cheesy shot with the m49 snubbie
    IMAG1661_zps8b3b2153.jpg
    Kit List:
    ERDL flower-powers
    Nomex gloves (It was 2oC. Sue me!)
    OD towel
    Jungle boots with dogtag
    M61 belt set for M14
    NVA Indig' rucksack
    Airstrike panel
    Claymore satchel

     

    Hardwear:
    Cyma M14 with some fine-*albatross* proper wood.
    Tanaka M49 Snubbie on a 'dummy cord'
    Coupla Smokes
    Coupla Baseball frags.

    Et voila!

  17. Post pics of your Belt Kits

    in Kit & Loadouts

    Posted

    Belt rigs you say?...I got your proper beltrigs right here, bub! :)

     

    My various 'Nam webgear sets- ALL original,dated issue kit- no repro tat ;)....
    IMAG1601_zps822cde1c.jpg
    Heavy Classic 'Infantry' Loadout- set up for the maximum amount of M16 mags and water....If you've seen me skirmish or at Beltring over the last 7-8 years, this is probably what I was toting, plus a bandolier or two for the original 21 magazines your average line grunt would carry.
    IMAG1600_zpsf7fd0bb6.jpg
    2 Light Advisor loadouts- upper one is the one I use with most things that aren't 'Line Infantry'.
    Lower one is the super stripped down belt order for my M10 .38 revolver.
    IMAG1599_zps6f71dbc0.jpg
    USMC Webgear for my Recon loadout- M14 pouches, M61 belt, M51 sussies, M67 frags and a length of surgical tube for emergency tourniquette.
    IMAG1602_zpsd080cd91.jpg
    MACV-SOG belt order- Original BAR belt, M67 sussies and sleeping bag carrier, a trio of M56 canteen pouches, XM28 gas mask in carrier, SDU5 strobe, Gerber Mk2 fighting knife and an original lightweight poncho. oh, and a couple of carabiners.

  20. Snoopy's Initial Impressions on the Tokyo Marui MP7A1 GBB

    in Pistols (Gas)

    Posted · Edited by demoncase

    Going back to nozzle failures earlier in the thread: That looks like a brittle failure, rather than an overstressed failure, judging* by the shell-shaped tide marks in the failure face on the pictures shown.

     

    This is an injection moulded part- Understand that an injection mould will have 3-50 part spaces in each tool, so a single 'shot' produces as many as possible.

     

     

    It's most likely that there are 10 or so nozzles in each shot. If the tool is poorly designed and/or process controls aren't being adhered to, you often get the part-mould furthest from the shot being poorly cast- The plastic is cooling and not flowing as well, so you get 'cold weld' lines which will result in creating a stress raiser in use- The crack is already there, and it's a question of when not if it fails....I've seen this in metal-injection moulded parts and polymer parts equally over the years.

     

     

    This happens over time and as the mould wears- each shot of molten plastic reduces the polish on the inside of the tool, increasing friction and slowing the time the plastic take to travel around the mould. Without regular refinishing of the tool, you can even get 'short shots' where some parts aren't fully 'filled' with plastic.

     

     

    What's at fault here- again extrapolating based on experience- is probably QC not picking up that the process has drifted over time and a small proportion of each batch are non-conforming....In this case, without something like a dye-penetrant inspection of every part, it's hard to spot cold weld on dark plastic parts- short of reported failures. You only use dye-pen on safety critical components due to the cost/time implication, and that ain't airsoft. You can test-to-destruction a sample, then accept or reject the batch- but if there is a variation across a batch (as I describe) it's luck of the draw if you get a non-forming one.....and here we are....

     

    The airvoid in that first noted failure is telling- that's clear a symptom of poor material flow inside the mould as I describe above.

     

     

    Just to note- these are problems that EVERY manufacturer of injection mouldings has to keep on top of- airsoft or not....I went into Homebase to buy a new kitchen bin a few weeks ago and found the 'reduced to clear' ones all had a clear 'cold weld' line running down the length of the body.

    I didn't buy one.

     

    Would all the above stop me buying an MP7 if I was in the market? Nope....It's a production hiccup, for my money.

     

     

    *Not wanting to get into an internet 'willy length' competion, but I've a Bsc in Materials Science, 5 years in a technical materials laboratory specialising in polymers and ceramics, 10 years experience as a NADCAP heat-treatment/chemical processing auditor and 15 years overall in the aerospace industry.

    • Like 13

  21. Revolver Picture Thread

    in Weapons

    Posted

    Can't remember where I read it and who said it, but on the 8mm .44 line you can chamber the new X Cartridges in the old system, but not vice versa. Also Vanaras (only at RSOV it seems) makes inexpensive .45g 8mm that fly pretty well.

     

    While I haven't done it myself, it would make sense: the old shells have a step in them that's narrower than the new 'bullet' shaped X-cart front end

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