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ardrummer292

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Everything posted by ardrummer292

  1. ardrummer292
    I spoke a little too soon on this topic. One of the Maximis owned by a friend fractured the stock bipod. He sourced a real-steel replacement, which wasn't too terribly expensive. Note that the UKSF Maximi uses an older-style standard M249 bipod, not the newer side-folding version or the prohibitively expensive Mk48-specific bipod: https://www.midwestgunworks.com/page/mgwi/prod/49505 I plan on whacking a short section of 1 1/4" OD x 1" ID aluminum tube inside it, which is required to make the real bipod fit. Link to my guide showing the same bipod upgrade process on a CA/A&
  2. ardrummer292
    More hardcore/realistic events (such as Milsim West) are a mainstay on this side of the pond. Rucking in, setting up patrol bases, conducting raids, and sharing a bit of misery are all part of the experience. As for conventional pickup games, I've learned that it's all about who you play with. I've been blessed with a solid group of teammates (and more importantly friends) who are all on the same page. Win or lose, we're all having fun.
  3. ardrummer292
    Another update: I'm having good luck with the Lonex LMG air nozzle + Bullgear hopup unit combo. I have installed this setup on a second Lambda Maximi with similar results to those above. I plan on doing the same to a third Maximi, which will be gracing my work bench shortly.
  4. ardrummer292
    Does the inner barrel have room to wiggle? If so, an easy fix is wrapping a layer of tape around it to "shim" it into the center of the outer barrel.
  5. ardrummer292

    DMRs

    ardrummer292 replied to BennyBaker's topic in Weapons

    Nothing especially noteworthy, just a VFC HK417 with some accessories and a truly horrific paintjob. UKSF fellas seem to like their Kryptek paint schemes, so off I went. I "retired" from machine gunning due to a back injury, but I still had a hankering for some sort of special-purpose weapon. This is my first DMR and it's quite lovely to use.
  6. ardrummer292
    Quick update: got the Bullgear hop unit installed, plus a Lonex LMG air nozzle. Preliminary results are excellent. These parts, combined with a Prometheus 460mm 6.03 tightbore and purple bucking, yield ~386 +/- 4 fps w/0.30g bbs. This is about 2.09 J, or 475 fps w/0.20g bbs. Results were obtained with the stock M140-ish spring installed. Fair warning, the Bullgear hop unit has a weird clamshell design. It took me a bit of head-scratching to figure out the proper method for installation.
  7. ardrummer292
    Well sh*t, I already have it in hand. Was really hoping to use it to improve the airseal, since the stock unit seems a little leaky. I'll fiddle with it to see if I can make it work. Either way, I'll report back with my results.
  8. ardrummer292
    Does anyone have any information on the new Bullgear hopup unit for these guys? Link: https://bullgear.net/hop-up-lambda-defense-mk48 It seems there's some demand for a replacement hop unit, presumably because the stock cast unit doesn't have great airseal. I'm wondering which air nozzle they're designed for.
  9. ardrummer292
    Almost forgot a section. Notes from my cancelled S&T HK417 build. Retro Arms V2.5 SR25 gearbox modification: reducing front gearbox wall thickness to restore correct tappet plate range of motion. This modification is not required for the Retro Arms V2.2 HK417 gearbox. Retro Arms SR25 gearbox installed in S&T HK417 lower receiver Example of cracked S&T HK417 upper, taken from AirsoftPro’s website VFC HK417 upper installed on S&T HK417 lower, demonstrating dimensional differences S&
  10. ardrummer292
    A bit late to the game, since this rifle has been out for 10 years. The lack of technical details available led me to write an internal and upgrade guide myself. Taken from a writeup I put together for my local group: https://docs.google.com/document/d/19EZn2DgiSSANZsLn4gtlVTp4V9gO-Yv_RZc2uJPndm0/edit?usp=sharing I'll leave all the UKSF impression-specific stuff out and just repost the technical bits here. If you're interested in building a UK-spec HK417 (a.k.a. the L2A1 SACTARASS), I believe I have most every relevant detail covered in the link. Without further ado...
  11. ardrummer292
    Prometheus barrels tend to be a bit thicker than others, presumably in the interest of stability and accuracy. I doubt the AK74MN specific tightbore is any thicker than any other Prometheus inner barrel, but I can’t be sure. You might need to lube the new inner barrel so it slides into place. Failing that, I imagine the outer barrel will need to be bored out very slightly. Not sure how that would be accomplished though.
  12. ardrummer292
    I’m a fan of Prometheus purple buckings. G&G green buckings are a decent substitute if the Promy isn’t readily available. The barrel you linked is the correct one.
  13. ardrummer292
    The SHS MP5K nozzle I installed works very well, for the record.
  14. ardrummer292
    I would check to make sure the hopup bracket inside the receiver is allowing the hopup unit to slide back fully into battery. I found that, if the bolts on the receiver hopup bracket are too tight, the hopup unit will be stuck in a position spaced away from the gearbox.
  15. ardrummer292
    Got the new WARFET-based wiring harness made up and installed. The gun is a happy camper, especially with the Bullgear insert pumping rounds in as fast as the gearbox pumps them out. Dumped about 1000 rounds through it as a test fire, with no hiccups or drama.
  16. ardrummer292
    It was a super cool setup, but definitely not easy to complete. Finding a machinist willing to modify the stock-to-receiver interface was difficult, and the loss of the folding function (due to routing the HPA line through the hinge) was kind of a bummer.
  17. ardrummer292
    A few more picture from the boxmag conversion: Wiring removed from the Bullgear Mk48 boxmag insert. Cutting this wiring out deactivated the adjustable rate-of-fire feature as well as the push-button feed feature. While those are handy, wiring them up was going to be too fussy. A simple on-off arrangement should work just fine. Bullgear Mk48 boxmag insert, cut to size. The sliding bottom trap door is not inserted, allowing you to see the lip at the bottom of the Lambda boxmag body. This will support the boxmag insert quite nicely, while shielding it from impa
  18. ardrummer292
    Bullgear boxmag upgrade complete, now awaiting testing. Here's some pictures to show a broad overview of the process: Stock boxmag, disassembled. The cordura cover is not shown. Bullgear Mk48 boxmag insert, in stock form. This insert is designed to fit a real Mk48 nutsack, not the Lambda replica. Cutting was required to ensure fitment. Bullgear Mk48 boxmag insert, heavily modified. I cut it to size in order to fit it into the Lambda housing, which involved cutting off two of the vertical "walls," trimming the bottom sliding trap door, and c
  19. ardrummer292
    Great input @E_27_R, thanks! If Lambda does offer alternate box mags, I think a replica of the shorter 50 round version would be beneficial for many owners. Likely wishful thinking on my part though. My buddy has not experienced any issues with locking his bipod in the stowed position. I didn't realize this was the case. Happy to be corrected!
  20. ardrummer292
    Correction: just shy of 22 pounds (10 kg), with an empty boxmag and no accessories. Brutal. The battery I mentioned here is a Turnigy 11.1V 2000mAh 15-25C LiPO, SKU NG2000A.3S.15. Dimensions are 126 mm long x 21 mm tall x 29 mm wide. https://hobbyking.com/en_us/turnigy-nano-tech-2000mah-3s-15-25c-lipo-airsoft-pack.html?queryID=ce3dbd784a2df032a85c1c47ac824bcd&objectID=31061&indexName=hbk_live_products_analytics I'd recommend a battery with a higher C rating (say somewhere in the neighborhood of 20-40C or 25-50C), if possible. I have been unable to find one that
  21. ardrummer292
    One of my guys recently purchased a Lambda Defense Mk48. It survived for about 500 rounds before it blew a piston, which is how it ended up on my work bench. My notes are below, for reference in case anyone wants to take a peek under the hood. The version my friend got is actually the limited edition “Maximi” version (as used by UKSF), but I imagine there aren’t any significant technical differences between this model and the more common US-issue Mk48 version that Lambda has in production. Externals – This thing weighs 18-19 pounds unloaded. It’s heavier than my old Echo
  22. ardrummer292
    Honestly, if it's running the way you want it to run, I'd leave it be for now. A parts breakage is a better reason to crack it open than a non-specific desire to "upgrade." If the shotgun is lacking in one specific area, that can inform your upgrade path. What do you want it to do better/differently? I wouldn't worry about maintenance too much, since that will also involve disassembling the shotgun. When it comes time to take it to bits, you can handle installing upgrades and performing preventive maintenance all at once.
  23. ardrummer292
    Sorry @PayloadCo_Blazes, just seeing this now. I'm glad you found my writeup useful. Going "whole hog" with a build like this is a process, but it's fun to push the performance envelope of a system to see what it can really do when the work is put in. Chronoing tri-shots is tricky. In a perfect world, loading a shell with one bb would give you a clean, realistic velocity reading. In reality, the other two barrels being empty absolutely effects the flow and pressure within the system, affecting the reading you get from the one loaded barrel. I've found that chronoing the shotgun whe
  24. ardrummer292
    Wrapped up my VFC Avalon-based L119A2 build recently, complete with horrifying (but kit correct) Kryptek paintjob.
  25. ardrummer292
    My thoughts exactly. The delineation in the Saiga magazine between bb feed and gas supply gives me hope that this is TM's intent.
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