Shot the new to me classic RT for the first time

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  • Kajo
    Registered User
    • Jun 2001
    • 152

    #1

    Shot the new to me classic RT for the first time

    Hey all,

    << Cliffs below if you don't want to read the whole thing>>

    I recently purchased a used classic automag RT and played for the first time with it on Saturday. Right off the bat it had a major leak at the asa adaptor.. completely my fault, forgot to tighten one of the bolts. After that was all fixed up I dropped some oil in the asa and put about 40 shots through with the barrel off. There was some RT effect going but it wasn't consistant. I attribute this mostly to the dumpy steel rental tank I was running. A good high output tank should correct this. With the barrel back on I put a few shots over the chrono, not super consistant to be honest. I was 250, 269, 275, 255, etc. The field I was at tries to get everyone around 250 (don't ask me why, it's outdoor) so I just left it. Obviously I was shooting compressed air but perhaps the temperature still had something to do with it. It was in the low 30s with wind.

    The first few games went well. I wouldn't say the thing was shooting darts with the aftermarket Smart Parts AA barrel but it was good enough to get quite a few kills. Somewhere in the fourth game I chopped one right before the match started. I was shooting cork screws after that, no amount of dry firing or trying to shoot through it would get the accuracy back. I had to pull the barrel off after the game, run some water through it, and hit it with a squeegee to get the accuracy back.

    After I chopped that first one I seemed to chop more often. It was partially my own fault for short stroking the trigger and partially the ridiculous blowback the RT seems to have. I have a Halo B on the thing and it can't keep the balls flowing well enough. The ball stack is there but they don't drop into the chamber. I'm actually afraid to try and RT the thing with paint in there because I'm sure it would be an instant blender.

    As the day went on the gun developed a small leak which I'm fairly certain was coming from the banjo bolt. I took out a wrench while the thing was under pressure and tried to tighten AND loosen the banjo bolt.. the leak seemed to get better and worse in response but ultimately did not go away. If I took a few shots it would die back down but would reappear after 30 seconds or so. I just kept refilling the air tank, I didn't seem to have any drop off issues so it was more of an annoyance than anything else.

    On the second to last game of the day I was getting ready to go again. After every game I have a habit of putting the safety on and turning the powerfeed plug. Well, I don't know what the hell happened at the start of this match but I flipped the power feed plug back and instantly chopped a ball. There seems to be some sort of issue with the power feed plug and a force feed hopper. The balls seems to be under an abnormal amount of stress... I'm not sure if it's because I have the "standard" power feed plug and not the parabolic or if it's just because the whole concept was designed before force feed loaders. At any rate, the bolt jammed up pretty bad when I chopped. The trigger was completely loose which I'd attribute to the bolt being stuck in the "forward" position. I wasn't real clear on how to unjam the thing so I just played the last two games with a rental Pirhana.

    Flash forward to today. I tried to disassemble the thing to get everything cleaned up. I thought you just had to pull out the field strip screw and out pops the valve/regulator/bolt assembly. Well I had to fight that damn banjo bolt for the better part of an hour. I unscrewed the thing like a normal person would but the thing would just NOT come out. I could rock the valve side to side as well as back and forth but I could feel the banjo bolt "slipping" when I tried to unscrew it. Well as it turns out the bolt is only threaded on the valve portion and not the rail or the trigger frame. I finally decided to take a vice grips and attempt to just pull the thing out. I'm not the strongest guy in the gym but holy smokes that took all the force I could muster to rip out of there. Do any of the rest of you have a hard time getting the banjo bolt out? I think it's really hard to take out because of the o-rings.

    On the topic of the banjo bolt... I went to school for mechanical engineering and I really respect the design Tom Kaye came up with for the initial automag but WHAT IN THE HELL is up with the banjo bolt? Why was the air not directly fed into the regulator like the rest of the automag lineup? It seems like the banjo bolt, while it looks clean is a complex solution to a simple problem. I was pondering how I could re-design the thing all day. I've been told that they can mill the rail and altar the banjo bolt in some way at the factory. Does anyone know what that entails? Also... during the disassembly process I noticed some sort of sticky grease (probably because it was old) between the rail and the body. Is this normal? I don't see any reason for this area to be greased because nothing on it moves.

    Wow this post got really long! I'm really happy with the RT though all in all. I shot quite a few people out with it and the ref actually asked me what I was shooting. When I told him it was an automag RT he said "damn that thing is fast for a mechanical." He asked me if it was a converted pump. I think he was a little bit confused between automags and autocockers. When I told him NO and that it was made by AGD he didn't even recognize the company. Oh well. The gun is actually quite quiet too... not sure if it's because of the 14" AA barrel or just automags are more quiet then I remember. They sure do have a unique sound.

    For those of you that read the whole thing, thanks.

    Cliffs

    1. Automag RT shot well for a few games
    2. Developed slow leak from banjo bolt, is there a modification they do at the factory?
    3. Bolt jammed, how do you fix without disassembly?
    4. Anyone else have major feed issues even with force feed loaders
    5. I'm not a fan of the banjo design
    #16 - Team Flying Balls
    Sponsored By: Apocalypse Paintball
  • ghost271
    Registered User
    • Jun 2001
    • 183

    #2
    Hi Kajo,

    Sorry to hear you didnt have a better day than that. I am fairly new at coming back into the mag scene since the early nineties. Do you have the Lvl 10 bolt kit ? If not, that'll stop the chop issues. I had what I thought was a banjo bolt leak too and it turned out to be a bad on/off o-ring. You should buy an RT repair kit, and replace the Banjo bolt o-rings. I put lube on mine and it came out a hell of a lot easier.

    A high pressure tank will definitely help with the RT effect. Also order a parabolic plug just to make sure thats not the issue. Its not the force fed loader thats the problem as they have videos of the RT ripping with a Halo B on top.

    Throw a barrel kit on there and a Lvl 10 and I think you'll be laughing all the way to the bank. I played a full day with my XMag last week in Mech mode, and it was sheer joy the whole day. I just got my leaks solved and Lvl 10 installed on my New/Used RT and put some air through it. It RTs like a mother F'er !

    Im stoked to be shooting these guns after 20 years. With the resurgence of mechanical guns and autocockers making a comeback (here anyway), I'm sure we'll be seeing more mags hitting the scene again too.

    Congrats on your new purchase !
    If you can't join em, shoot em !

    Comment

    • Kajo
      Registered User
      • Jun 2001
      • 152

      #3
      Anyone have an answer to my question of whether or not there is a factory modification for the banjo bolt and rail? I vaguely recall a thread on here about it but I have no idea what I was searching for at the time.

      @ghost271 - What are you lubing the banjo bolt with? Just normal air tool oil? I did that and it is still a PITA to get out. Maybe the thing doesn't even have the right o-rings on it. I have an RT rebuild kit but without a decent key to go off of I'm in the dark for what o-ring goes where.

      Last question - is there supposed to be any grease between rail and body?
      #16 - Team Flying Balls
      Sponsored By: Apocalypse Paintball

      Comment

      • athomas
        Of course it works-its AGD
        • Jan 2002
        • 8039

        #4
        The grease between the body and rail is probably just paintball goo. It shouldn't be there, but a shot to the gun will put it there. Just clean it off at the end of the day. It won't hurt anything.

        It does sound like your feed plug is causing the balls to jam where they go into the breach. The parabolic plug will allow the balls to transition around the corner without binding under the force on the ball stack.

        Inconsistent velocity can be caused by inconsistent paint and it will also cause poor accuracy problems. This also contributes to jamming at the breach, especially with an older feed plug.

        The banjo bolt can cause some issues. If the orings are lubricated, the banjo bolt goes in and removes easier.

        Check your nubbins. Use the plastic ones. If the paint is small, you may need to force them farther into the barrel using tape around the barrel. This will prevent the balls from rolling forward and allowing the next ball in the stack from sitting partially in the breach and being clipped and/or chopped when the gun is fired.

        A jam can be fixed by pushing the bolt back with a squeegie or any other device that fits in the barrel. If you don't have anything, take the barrel off and use your finger. Just don't fire with your finger in front of the bolt. It will hurt with the level 7 bolt.

        Get a level 10 bolt. It will prevent chops in the future, even if there are feed problems. Once you get the RT tuned up, it will be a beast on the field.
        Except for the Automag in front, its usually the man behind the equipment that counts.

        Comment

        • Kajo
          Registered User
          • Jun 2001
          • 152

          #5
          athomas,

          Thanks for the advice.

          I removed all the "goo", changed and lubed the banjo o-rings, changed my detent, and bought the true parabolic pf plug. Unfortunately, I now have other issues but I made a new thread.

          I am thinking about sending the whole mess to AGD and telling them to install a LVL10 and get the marker tuned up properly. I live in a condo with basically no access to compressed air so it's kind of a pain to troubleshoot things at home.
          #16 - Team Flying Balls
          Sponsored By: Apocalypse Paintball

          Comment

          • rawbutter
            Registered User
            • Feb 2007
            • 1463

            #6
            Originally posted by Kajo
            athomas,

            Thanks for the advice.

            I removed all the "goo", changed and lubed the banjo o-rings, changed my detent, and bought the true parabolic pf plug. Unfortunately, I now have other issues but I made a new thread.

            I am thinking about sending the whole mess to AGD and telling them to install a LVL10 and get the marker tuned up properly. I live in a condo with basically no access to compressed air so it's kind of a pain to troubleshoot things at home.
            Don't give up yet!

            If you bought the thing used, you have to assume that the thing's been sitting idle in a closet for years. If you haven't done so already, take the whole thing COMPLETELY apart. Clean everything meticulously. Change every o-ring. The reason you had trouble with the bango bolt was probably because the o-rings were rotted out, and if you had trouble with that, then the other o-rings probably need replacing too. That might be why you're having RTing problems. The o-rings in the on/off assembly are probably shot.

            If you're uncomfortable pulling everything apart, there are diagrams here (you have to go down a bit to get to the RT one).

            If you don't have the right o-rings, you can get a rebuild kit from the AGD store here

            A good cleaning/o-ring check should fix most of your problems. When you put everything back together, make sure to lube it up really well.

            If you're still experiencing problems, then sending it off to AGD really might be the way to go if you don't have your own air. (You could also send it to Tunamart or a bunch of other places. Heck... you could send it to me if you wanted. I'm unemployed and would love the project.) It's not hard to learn all the in's and out's, but if you don't have the air to blow... yeah. It's just not worth the effort and the trips back and forth to the field... trust me. I've been there. That's why I bought a SCUBA tank. Now I can mess around all I want.

            But don't give up. The RT might give you a few headaches at first, but once you get it figured out and fixed up, it will be a super-reliable awesome powerhouse and will make everyone else jealous. Course, it will also make your wallet lighter.

            Comment

            • Kajo
              Registered User
              • Jun 2001
              • 152

              #7
              rawbutter,

              Thanks for the advice and the offer for help. If I was anywhere near Virginia I would take you up on the offer. The AGD factory is only about 60 miles away from my house though so I can get parts from them pretty quick!

              I do have a parts kit so I will change all the o-rings out and maybe the main spring.

              Don't worry, I won't give up. I know that when I get all the kinks worked out the gun will just blast. Without batteries!
              #16 - Team Flying Balls
              Sponsored By: Apocalypse Paintball

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