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Post by Ogre on Jul 23, 2013 22:33:40 GMT -5
So at Jackal III I traded away my UTG L96 for a AK-47, can't stay away from them, xD. The guy I traded with told me it had a few problems. On the lowest hop up setting the gun sends BB's sky high, and on full auto about 2 out of every 5 bb's miss feed. This could be an issue with the barrel and hop up unit being dirt, a hop up issue or a load of other things. I love AK's so I still took the thing regardless and decided this is going to be my project gun.  First thing is first, I need a new hop unit, and probably should through a tight-bore in there for good measure. What are people's opinions on the ICS AK-47 hop up unit, such as this one. www.evike.com/product_info.php?cPath=24_71_367&products_id=36931I should also probably throw in a H nub and a good bucking, and recommendations on those?  javascript:void(0); Am I going to have to replace the entire stock or is there a way I can just by a new buttplate? I will update this thread as the build progresses. By the time I'm done with it, it will look nothing like it once did. |
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ctres
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Post by ctres on Jul 23, 2013 22:50:58 GMT -5
Why do you need a new hop up unit? I doubt that is your issue. Take out the barrel and inspect the bucking. It was likely installed incorrectly or it is damaged. Either way I'd say replace it with something decent. Prommy, Systema and Lonex are all good choices.
Also, is this a TM design or VFC design AK. IIRC the don't use the same hop up unit so look into that before buying anything. Also, ICS isn't exactly known for good internals if you decide you need a new chamber.
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Post by Ogre on Jul 23, 2013 23:06:50 GMT -5
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Deuce
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Post by Deuce on Jul 23, 2013 23:13:31 GMT -5
I'm not that big of an ak guy, but I recently put a mad bull ultimate hopup in my new mk18 with a 6.01 and its became a monster for accuracy and range.
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Post by Ogre on Jul 23, 2013 23:16:08 GMT -5
I'm not that big of an ak guy, but I recently put a mad bull ultimate hopup in my new mk18 with a 6.01 and its became a monster for accuracy and range. I'm a fan of Madbull's products, do they make an AK hop up? Also unrelated questions here. Anyone know how to remove an AK-47's rails? |
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ctres
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Post by ctres on Jul 23, 2013 23:23:52 GMT -5
Not all Cymas are TM style, but now that I look at the picture more it looks like yours may be. My advice before buying anything would be to identify what specifically in your gun is causing the undesirable results you are getting. If you don't do this first, then throwing money at it may not help much since there are plenty of "upgrades" out there that really won't do anything for you. For accuracy you should focus on air seal and barrel quality. Replace o rings that don't seal well, seal the bucking, get an o ring air nozzle if the stock one does not seal well, seal the cylinder head, and lubricate the o rings properly. All of those things would cost about the same price as a hop up chamber and will do much more for you.
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Post by Gimpalong on Jul 24, 2013 10:33:16 GMT -5
Ogre,
Based on the picture, it looks like your AK is the .028A model which disassembles like the TM. I think the Cyma models in the .04x range disassemble like the VFC.
You need to diagnose the issues that you're having, which seem to be 1) poor accuracy and 2) mis-feeding.
For #1, you might try disassembling the hop-up unit and giving the barrel, nub and bucking a good rinse. Reassemble everything and test function and see if you're still having issues with over-hopping or inaccuracy. If you are, try swapping in a new bucking and nub and re-testing.
For #2, you need to figure out whether your feeding issues are related to the magazine, hop-up unit or something more gearbox critical like the loading nozzle or tappet plate.
If you hold the magazine into the gun while firing does it feed better? Does it misfeed if the magazine is tilted? See if you can test a mid-cap in your rifle to determine if it's the magazine or the rifle itself.
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Post by Ogre on Jul 24, 2013 12:30:29 GMT -5
Ogre, Based on the picture, it looks like your AK is the .028A model which disassembles like the TM. I think the Cyma models in the .04x range disassemble like the VFC. You need to diagnose the issues that you're having, which seem to be 1) poor accuracy and 2) mis-feeding. For #1, you might try disassembling the hop-up unit and giving the barrel, nub and bucking a good rinse. Reassemble everything and test function and see if you're still having issues with over-hopping or inaccuracy. If you are, try swapping in a new bucking and nub and re-testing. For #2, you need to figure out whether your feeding issues are related to the magazine, hop-up unit or something more gearbox critical like the loading nozzle or tappet plate. If you hold the magazine into the gun while firing does it feed better? Does it misfeed if the magazine is tilted? See if you can test a mid-cap in your rifle to determine if it's the magazine or the rifle itself. Sprayed some Silicon oil in the hop up chamber. Feed issue was solved, still crazy inaccurate, I'm gonna disassemble the hop up and take a look at the bucking when I get home from work today. |
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Post by slippy on Jul 24, 2013 12:59:11 GMT -5
Sounds like a messed up bucking or missing nub to me. Hopefully you can get it running right Oger.
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Post by Cats (Doom) on Jul 24, 2013 19:11:55 GMT -5
Anyone know how to remove an AK-47's rails? To take out the whole forgrip assembly: remove the fake cleaning rod, there is a Phillips-head screw under the gasblock that screws directly into the outer barrel that comes out, then just slide the front retaining-ring and gas tube forward and the hand guards should fall off. To remove the side rails on the handguards, there should be some screws holding them on. |
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Post by Ogre on Jul 24, 2013 21:05:32 GMT -5
Anyone know how to remove an AK-47's rails? To take out the whole forgrip assembly: remove the fake cleaning rod, there is a Phillips-head screw under the gasblock that screws directly into the outer barrel that comes out, then just slide the front retaining-ring and gas tube forward and the hand guards should fall off. To remove the side rails on the handguards, there should be some screws holding them on. Now my internet is running slow due to our data useage for the month being up (All that Wifi at Jackal III killed me) so I can't load video on how to get to the hop up unit and barrel so can you tell me how? |
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ctres
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Post by ctres on Jul 24, 2013 21:20:30 GMT -5
If it's TM style it goes something like this.
1. Remove top receiver cover and charging handle spring and guide. Unscrew the hop up adjuster slider piece and the little screw that holds down the plastic tray thingy on top of the gearbox that houses the whole charging handle assembly.
2. Flip the gun upside down. Unscrew the two screws at the front of the magwell and the two screws at on the outside of the receiver in front of the magwell.
3. Slide the front assembly forward and tilt it out. The hop up is secured by two screws on the little wings.
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Post by TheEnd on Jul 25, 2013 23:24:13 GMT -5
Sprayed some Silicon oil in the hop up chamber. Worst idea ever. The bucking uses friction to put back spin on the bb. Lubricating the bucking will cause loss of accuracy and range due to inconsistent or non existent friction. Typically Chinese clones have a ton of grease in their cylinder and after a while it works its way through the nozzle and onto the bucking. It doesn't take much to cause massive issues. Sort of like slathering wheel bearing grease all over a cars brake rotors. Bad news. Take out your bucking and wash it in warm soapy water. Dry the inside with a q-tip to make sure you got it all. If the q-tip is dirty wash the bucking again. If you know how, it's best to flip the bucking inside out and wash it. If you have some fine polishing compound (Tamiya makes a fantastic set)you can put some on a piece of cloth and put that in an unjamming rod. Chuck the unjamming rod into a drill and polish the hell out of the barrel. I use that technique to get a mirror polish on my barrels. |
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