Jump to content


Photo

Elite Alpha Trooper Spring replacement and supporting mods


16 replies to this topic

#1 Jeo

Jeo

    Red Team: HooRah!

  • Members
  • 93 posts
  • Location:Canberra
  • State:Australian Capital Territory
  • Country:Australia

Posted 29 May 2013 - 06:56 AM

Blue Alpha Trooper!

Honestly, I never got the obsession with the Alpha Trooper. It's a solid blaster, but I always preferred the Raider myself. Therefore I wasn't super excited about the release of the Elite Alpha Trooper (EAT) as I already had a few Rampages to call my own. I am however apparently in the minority on this front so I grabbed an EAT to see what we could do with it. Today we'll run through a basic air restrictor (AR) removal and replace the spring. Specifically we'll be using a Black Tactical V2 spring which is quite a bit shorter than the stock spring, which means we'll also need to do a few lock removals as supporting mods as well.

Posted Image

_________________________________________________________________________
Tools/consumables needed

Phillips head screwdrivers
Drill and 6mm bit
A long, round hand file
BTV2 Spring
Stronger catch spring
Small flat hand file/Dremel with cutting disc/small modelling saw
_________________________________________________________________________

The less than amazing Australian spec grey trigger version. Conveniently, we'll be replacing the de-tuned spring with our new BTV2 anyway.

Posted Image

Start by removing the end cap. It's held on with two screws that are thicker than those in the rest of the blaster.

Posted Image

Then the priming grip.

Posted Image

Then the rest of the screws in the shell.

The two on the top here are thinner than than the rest.

Posted Image

The two on the tactical rail are the same thickness as the standard screw, only shorter.

Posted Image

And this one in front of the clip well. Same thickness, just shorter.

Posted Image

Hooray! The inside of the blaster.

Posted Image

As always, take a minute or two to have a good look around the internals and try to get an understanding of how each part works.

Posted Image

Posted Image

Posted Image

Posted Image

Ok then, on with the dis-assembly. Remove the jam door and the top shroud.

Posted Image
  • 0

#2 Jeo

Jeo

    Red Team: HooRah!

  • Members
  • 93 posts
  • Location:Canberra
  • State:Australian Capital Territory
  • Country:Australia

Posted 29 May 2013 - 06:58 AM

Then this screw holding the dart tooth in.

Posted Image

Posted Image

So we can remove the dart tooth.

Posted Image

Then we can remove the whole breech assembly.

Posted Image

Separate the breech and the plunger.

Posted Image

Looking down the back of the breech we should find an AR.

Posted Image

Knock that out with a drill.

Normally I'd recommend separating the breech from the sled but in this case I just could not get the locator pin free. It's not particularly bad if you don't, you just have to be more careful when drilling through that it doesn't grab and break the mounting point between the breech and the sled.

Once that's done, clean it up with a hand file.

Posted Image

Then reassemble.

Posted Image

Here's the new beefier spring on the bottom compared to the stock spring on the top. See the difference in length? This causes us some problems.

Posted Image

So, lets get back to the shell.

Posted Image

Remove the trigger bar. It's held in by one screw.

Posted Image

These two locks are the problem.

Posted Image

Remove both of those.

Posted Image

Then replace the trigger bar.

If you're keen you could remove the spring, grind/cut off the front nub, and glue the bar in it's forward position. This would provide added reliability in that when it you pull the trigger, it would fire; but it would also mean the blaster could fire with the breech only half closed, which would cause jams. Provided you're consistent with your priming, and your trigger discipline, you will get improved reliability from your blaster.

Posted Image

Next up is the clip release lock. We need to grind/cut/file this lip off.

Posted Image

Like so.

Posted Image

Doing this allows us to depress the clip release button, even when the blaster is primed. This is again necessary due to the shorter main spring.

Posted Image

See.

Posted Image

Then reassemble.

Posted Image

One last mod is a stronger catch spring. The new main spring puts a lot more strain on the catch and we need to improve that.

This spring in particular is one I grabbed from bunnings forever ago to use in a Longshot catch. I have no idea what the product number was unfortunately but it came in a pack of three and has a diameter of 9.35mm and an uncompressed length of 17.75mm.

Posted Image

Here it is compared to the stock spring.

Due to the increased diameter I did have to cut away some of the inside of the shell here, but I'm sure you'll figure out your own requirements based on your chosen spring pretty easily.

Posted Image

From here, reassemble and we're done. My camera died right at this point so there's no photos of said reassembly, but I'm sure you can work it out.
  • 0

#3 Griever 2112

Griever 2112

    Member

  • Members
  • 439 posts
  • Location:08610
  • State:New Jersey
  • Country:United States

Posted 29 May 2013 - 07:26 AM

Clean writeup, very informative.I would like to add something though, this was from my own issues with the EAT. At the back of the breech is a small ring attached (not the O-Ring but you can see it in Jeo's pick of the breech pulled out) If that comes off when drilling, IT NEEDS TO GO BACK ON, or when priming the catch will not engage.

Question though, why take the time to shave and cut the clip lock, why not just remove it like all the others?

Edited by Griever 2112, 29 May 2013 - 07:26 AM.

  • 0

Griever 2112 still plays with his alpha trooper quite often despite owning one of the scariest +bows.

My Youtube Page

#4 Jeo

Jeo

    Red Team: HooRah!

  • Members
  • 93 posts
  • Location:Canberra
  • State:Australian Capital Territory
  • Country:Australia

Posted 29 May 2013 - 11:52 PM

This o-ring on the back of the breech tube?

Posted Image

Not sure how that would come off whilst removing the AR, but yes, don't lose that.


I didn't completely remove the clip lock as it also functions as the jam door lock and this blaster's new owner wanted the lock in place.
If you wanted to remove it, it would probably be easier.
  • 0

#5 Griever 2112

Griever 2112

    Member

  • Members
  • 439 posts
  • Location:08610
  • State:New Jersey
  • Country:United States

Posted 30 May 2013 - 01:35 PM

Posted Image

If you look where I have the red circle and arrow, their is a seam there, that is a small ring holding in the A/R, when I was drilling out my A/R that popped right off, and it happened on 2 Troopers. I lost it the first time, and that will prevent the breech from pushing the plunger back far enough to engage the catch.

Also the Blue Circle is the actual Jam Door "lock" as long as that is in tact, and the Jam Door is unmodified, as long as the boltsled is forward you cannot open the Jam Door.
  • 0

Griever 2112 still plays with his alpha trooper quite often despite owning one of the scariest +bows.

My Youtube Page

#6 CRCL

CRCL

    Member

  • Members
  • 18 posts
  • Location:Perth
  • State:Western Australia
  • Country:Australia

Posted 30 May 2013 - 09:26 PM

Posted Image

If you look where I have the red circle and arrow, their is a seam there, that is a small ring holding in the A/R, when I was drilling out my A/R that popped right off, and it happened on 2 Troopers. I lost it the first time, and that will prevent the breech from pushing the plunger back far enough to engage the catch.


If you do pop off that ring bit, the solution I came up with is to just fill the top of the plunger-head with a couple of millimetres of hotglue. You just have to be careful how much you add, too little and the catch still won't engage, too much and the breach won't open all the way.
  • 0

#7 Jeo

Jeo

    Red Team: HooRah!

  • Members
  • 93 posts
  • Location:Canberra
  • State:Australian Capital Territory
  • Country:Australia

Posted 30 May 2013 - 11:09 PM

I see. Didn't have mine pop off but I have only tried one so far. Interesting.

Also on further notice, you're right with the jam door lock. Removing it would have been far simpler. Thanks Griever.
  • 0

#8 Griever 2112

Griever 2112

    Member

  • Members
  • 439 posts
  • Location:08610
  • State:New Jersey
  • Country:United States

Posted 31 May 2013 - 07:23 AM

I see. Didn't have mine pop off but I have only tried one so far. Interesting.

Also on further notice, you're right with the jam door lock. Removing it would have been far simpler. Thanks Griever.


n/p

I am not a 100% sure, but the Troopers I've gotten lately (and not just the Elite ones) I found the bonding agent used in the seams has been super weak... I got the last Original AT from my local Target, and the seam where the A/R is located was separated out of the box. And when modding my new Elite AT's I was able to pop that back ring off with ease on the first one (super careful on the second, but did it anyway) and was able to hand separate the breech to take out the A/R. That's why I try to warn people about that little ring.

I thought of the hotglue idea, but like you said it has to be precise. I just didn't want to have to keep messing with that. As long as you don't loose the ring it can be reattached at least I was able to do so. If you loose it though, then you're in trouble.

Edited by Griever 2112, 31 May 2013 - 07:25 AM.

  • 0

Griever 2112 still plays with his alpha trooper quite often despite owning one of the scariest +bows.

My Youtube Page

#9 CRCL

CRCL

    Member

  • Members
  • 18 posts
  • Location:Perth
  • State:Western Australia
  • Country:Australia

Posted 31 May 2013 - 11:53 PM

n/p

I am not a 100% sure, but the Troopers I've gotten lately (and not just the Elite ones) I found the bonding agent used in the seams has been super weak... I got the last Original AT from my local Target, and the seam where the A/R is located was separated out of the box. And when modding my new Elite AT's I was able to pop that back ring off with ease on the first one (super careful on the second, but did it anyway) and was able to hand separate the breech to take out the A/R. That's why I try to warn people about that little ring.

I thought of the hotglue idea, but like you said it has to be precise. I just didn't want to have to keep messing with that. As long as you don't loose the ring it can be reattached at least I was able to do so. If you loose it though, then you're in trouble.


I just thought of an even better and simpler way than hot glue to fix that problem. If the ring bit breaks off the breech, just glue it into to top of the plungerhead. Then you don't need to worry about getting the precise among of hot glue.

Edited by CRCL, 31 May 2013 - 11:54 PM.

  • 0

#10 Seprest

Seprest

    Member

  • Members
  • 41 posts
  • Location:Rochester/Albany
  • State:New York
  • Country:United States

Posted 01 June 2013 - 12:41 AM

Is the metal priming rod any stronger than the original AT, e.g. will we need to reinforce it when doing a spring replacement?

Edited by Seprest, 01 June 2013 - 12:42 AM.

  • 0
4 - HvZ Games Played

22- Mods completed

#11 azrael

azrael

    Member

  • Members
  • 393 posts
  • State:California
  • Country:United States

Posted 01 June 2013 - 12:40 PM

Very good question, I'll have to pop open my original AT at some point. I think the smaller spring diameter, despite having similar spring constants, is a lot easier to prime, though. My Raider with a 6kg spring was a lot harder to prime than this EAT with a 5kg spring.

FWIW, the easiest way I found to remove the AR was to purposely remove that bottom orange ring, then tap out the supports for the inner AR and let it fall out. Then I super glued the ring back on.
  • 0
Better Nerf By Science!
http://nerfscience.blogspot.com/

#12 Jeo

Jeo

    Red Team: HooRah!

  • Members
  • 93 posts
  • Location:Canberra
  • State:Australian Capital Territory
  • Country:Australia

Posted 01 June 2013 - 08:19 PM

The priming bar doesn't feel/look any different to what I remember of the AT. I can't imagine Hasbro retooling the part either.
  • 0

#13 azrael

azrael

    Member

  • Members
  • 393 posts
  • State:California
  • Country:United States

Posted 03 June 2013 - 08:14 PM

How many kg is the Black Tacticalv2 rated for?
  • 0
Better Nerf By Science!
http://nerfscience.blogspot.com/

#14 Toast

Toast

    Member

  • Members
  • 15 posts
  • State:California
  • Country:United States

Posted 01 July 2013 - 11:54 AM

Thanks for the guide Jeo!

I wondered if someone had insight into the benefits of removing the various locks. I used this guide to remove the AR from my EAT, and I'm waiting to receive my 5kg spring. Yay!

But as I observed the internals of the blaster (I primed, unprimed, chambered, etc for about 2 hours with the shell open yesterday) I was left wondering what the actual benefits are for removing the locks. Their functions all seem interconnected enough so that if you remove 1 you may has well remove them all: Magazine/jam-cover lock, sled lock, primer lock.

But they actually seem pretty well justified, so I was curious what the actual benefits are for removing them.

Thanks!
  • 0

#15 Jeo

Jeo

    Red Team: HooRah!

  • Members
  • 93 posts
  • Location:Canberra
  • State:Australian Capital Territory
  • Country:Australia

Posted 03 July 2013 - 05:31 AM

No idea on kg rating for the BT spring sorry.

The plunger tube has to go all the way forward for the lock to disengage, otherwise you can't reprime the blaster. With the shorter spring, this doesn't always happen.
  • 0

#16 ozn rfnerd

ozn rfnerd

    Member

  • Members
  • 27 posts
  • Country:Australia

Posted 03 July 2013 - 09:42 AM

Thanks for the guide Jeo!

I wondered if someone had insight into the benefits of removing the various locks. I used this guide to remove the AR from my EAT, and I'm waiting to receive my 5kg spring. Yay!

But as I observed the internals of the blaster (I primed, unprimed, chambered, etc for about 2 hours with the shell open yesterday) I was left wondering what the actual benefits are for removing the locks. Their functions all seem interconnected enough so that if you remove 1 you may has well remove them all: Magazine/jam-cover lock, sled lock, primer lock.

But they actually seem pretty well justified, so I was curious what the actual benefits are for removing them.

Thanks!


I'm doing a bit of R&D on the Elite AT at the moment, and I'd have to agree with you.

I'm not a huge believer in just ripping out all the locks willy nilly, as some of them serve purposes other than limiting your fun.

In the AT, I remove the big "horseshoe" lock that sits over the breach, but I leave the other 2 in as removing them affects the cocking action.

The old AT was good...the new one is even better.
  • 0

#17 ricter

ricter

    Member

  • Members
  • 2 posts

Posted 24 July 2014 - 10:37 PM

I've followed this guide in order to mod my Elite Alpha Trooper, but ran into an issue with the blaster. When I cock the blaster, it no longer catches on the door in the rear of the blaster. Ironically, I had left the locks in the blaster because I saw comments about priming issues with the locks removed, but I still ran into the issue anyways. I've since removed the locks in order to see if that may fix the issue, but no dice. Any suggestions on how to fixing the priming issue? I can think of some rather inelegant solutions (like sanding/filing down some bits or bulking up others with plastidip/glue) but those are all messy and seem prone to breaking.

Thanks in advance. If I should start a separate thread for this let me know. I can also provide pictures if that would be helpful.
  • 0


0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users