.50 cal AEG DIY Upgrade


Hello Airsofters, Last week introduced the M82 to the rental arsenal. However during the review we found that the AEG was under powered. So this week we are going to show you how to do the most cost affective, and fast upgrade. We will be applying these upgrades to the M82 but these upgrades are not model specific, meaning you can take these same steps to upgrade your SCAR,M4 or AK. Now lets start with the barrel.


To start remove the pin in the rear of the M82. Now slid the top portion off of the AEG. Now use a allen wrench to un screw it to release the otter barrel. Once you back out the allen screw out a few turns, unscrew the outer barrel counter clock wise.

DSCN0096Once completely removed you will find a spacer held in place by masking tape.Using a ruler measure how far back the spacer is from the end of the barrel. We found it to be about 9 inches from the end. Now remove the tape and slide the spacer off.


Now slide the inner barrel out from the outer barrel.


To start, set the hop up all the way back to zero. Now just remove the locking clip, then pull the barrel out of the hop up.


Now remove the small spacer ring.


Now add the small spacer ring to the new precision inner barrel first.Now add the hop up bucking, then slide it back into the hop up unit and don’t forget to pus the spacer back into place. Now place the inner barrel back in place and add the spacer. To add the spacer just measure out the placement of masking tape. Now add the spacer and another peace of masking tape. Now your all done.


We chose the Mad Bull 6.01 barrel. The cost was $45 which is about the average price. So how much does a 6.01  barrel help your AEG, does it really make a difference? We choreographed the M82 at 342, once we added the inner barrel we tested it again and it shot at 362 adding 20 FPS. So is it worth it, it’s up to you. $45 plus shipping for 20 FPS is what it really brakes down too.


Now to the gear box. The gear box we chose was AIM M150 gear box ($90)that is rated at 480-550 (also comes in a M120,M130,M160).This was a quick one two punch. We removed the original gear box and dropped in a pre upgraded AIM gear box.


This took just a little over 15 minutes while watching the daily show. So here’s how, just remove the screw at the rear of the gear box.



Now the remove the base plate at the bottom of the grip.


Now un connect the wires and slide out the motor. Once out unscrew the screws at the base of the grip. Lastly push out the body pin. Then drop in the new gear box and put it back together.


Now this is the most affective way to upgrade any AEG for many reasons. First cost, we have a picture of a side by side comparison that show the cost of getting parts one at a time. We came to the grand total of $225 (+/- depending on brand) for all the parts included in the gear box, where as we picked up the complete gear box (already assembled) for $90. Second, the time save disassembling and reassembling.imageimage















After adding the new gear box we changed out the motor for a Godzilla 5000 super high torque($46). We picked this motor for its low price and high powered magnets.


Next we added a small to large adapter ($2) to power the high torque motor. The M82 has a huge battery space so this was a no brainer. The Large battery is a 9.6 3500 mah so it wont die mid game and can easily power the super high torque motor.


Now to the test this beast. Originally it shot 342. Now after a $2 adapter, a $90 pre upgraded AIM gear box, and a $46 Godzilla motor, for a total of $138 and about 20 mins, the M82 now chronos at 525. Given that the barrel adds 20 the gear box really shoots at 500-505. The barrel was not added to the total price because it’s not a major factor but if you need just a few more FPS it does the job. The motor is another issue, we don’t recommend it if you are using a M120 or less spring, the stock motor of most AEG is powerful enough to run a M120. If you don’t have a gun that takes a Version 2 gear box, you could buy the AIM gear box and just take out all of the parts and that would still save you lots of money, then just transplant them in your current gearbox, but that’s another blog for another day.


The over all FPS to cost ratio was +183 FPS for $183 (1FPS:$1) for barrel, gear box and motor. Or 163 FPS for $138 for gear box and motor.If you bought each part separately you would have paid $310ish. But overall,the AEG can now run any spring like a M160 that puts out 600 FPS and that would only cost about $10 (or you could pick the M160 AIM gear box and save $10). So check it out for your self and hop on over to the rental page.

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