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MagPul PTS MASADA ACR

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Put the bottom stock pin in 3/4 of the way, put the top pin 1/2 the way in, then use a thin screwdriver etc to guide the top pin straight, give it a tap with a hammer and the top pin should go in straight, then knock the bottom one the rest of the way in.

 

Should work.

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Use my ACR today. Nothing but issues with it. 1 hr of playing around. The Hop-Up was playing up. Every 3rd shoot was good. But I'm sure there was no Hop-Up. It felt the distance wasn't like before. Same spring & BB weight. I've had the gun for 2months now. No problems. Could it be the weather as it was -2c? Could the hop up be effected?

 

I know it's been said. What would be the best Hop Up Rubber to use instead of Stock? MadBul, Guarder Silacone, TM? Has anyone changed the Hop Up and found it better.

 

The Stock one seems it doesn't get affect when moving the the wheel. I've followed people directions. Turn Off Hop Up when removing barrel and so on. Theres still the thing in the gun when move the wheel (forgot what it was called).

 

The BB travels well 15-20 Meters. But It drops. It doesn't feel the Back spin happens when the BB Drops and it goes up slightly. There no hop up really when move the wheel back and forth.

 

Would help loads if some could give me some ideas to fix it or buy other products. I did see something About removing the Gold Ring in the Stock Hop up rubber.

 

Everything in the gun is cleaned up and dryed. Excel 0.20 used.

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Ran mine today and last night as part of OP: Jawbreaker, operated perfectly fine all day except for semi not working for approx 1/2 hour in the morning and then working just fine all day long.

 

As far as range and accuracy went, I started the day with 5 pmags loaded with .25g Biovals and the gun shot great, with excellent range and accuracy, once i burned through them I switched to .27g Bioval and it turned my rifle into a goddamn death machine, shots per kill were dropped by nearly 50% and range was ridiculous, I am in love.

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Was at a game today where 4 ACRs were in play. By the end of the day 3 were broken. A friend of mine also has another one, and it is acting up. Another friend had to send his back for replacement. Of the 7 ACRs that I have seen in use, 5 of them have had issues :( One of them has been heavily modded, but the others have not, except for downgraded springs. Issues include hop-up problems, locking mech boxes, malfunctioning stock pins, and wobbling front end.

 

i am sure some of the owners will be along to offer details. I am almost afraid to use mine at this point :P

So I was at the game with dStole and mine's one of the ACR's with issues above. Probably to clarify the 3/4 at the game yesterday, mine was the heavily modified one which to be honest, I think I can hardly call it "PTS" anymore therefore I'd blame my mods rather than imply a PTS issue.

 

The 2nd (presumably YCare's replacement/repaired PTS ACR), I'm prepared to place a bet that his lockup issues is caused by his "rocking" spring guide. The spring was changed to be JP compliant and was longer and cut on one end. I believe it's an installation error of which when the spring guide end screw was put back into the spring guide, it was already at an angle rather than flush. I fixed his problem in the afteroon - I don't believe he had any problems after. However I think he still should :-

a) find a shorter spring but same power

B) flatten/flush the end of the spring that he cut

c) ensure the spring guide is flat/flush on the mechbox end before he screws in the bolt

 

I'm finding out the issue with the 3rd one later today, and if you can give me a look at the 5th (the one I was supposed to look at) I can see what's wrong with it. But for now I won't be so quick to blame a 5/7 or 71% failure on the PTS yet. I think it's time for more information and more details before any conclusion.

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ACR again used yesterday, 3000 rounds on semi only throughout the day in almost freezing conditions, not even a single lock up. Gun is still completely stock, 329fps and used 0.2g bb's. Again no complaints. Total round counts is around the 8000 mark, not high but seeing as about 7500 of that is semi auto firing can't see why other people are having issues with lock ups.

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Put the bottom stock pin in 3/4 of the way, put the top pin 1/2 the way in, then use a thin screwdriver etc to guide the top pin straight, give it a tap with a hammer and the top pin should go in straight, then knock the bottom one the rest of the way in.

 

Should work.

 

Cheers, worked a treat using a skewer. :)

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So yeah, changing the hophup to the Guarder 50% and using 0.25g made night and day for me. Went from spraying the 20m target with 1/30 hit to something like 2/3. Very satisfied with that.

 

On the other hand, the ACR did lock up again, for what AnakChan said, the spring was a cut one, and somehow maybe not properly installed (although I was able to install springs on my Tavor via the same way without any problem). So I replaced it for a System irregular pitch 1J, which brings the output to a ~0.86J, which is lower than the spring I was having lock up with (was around 0.94J), and somehow it seems like fine now, but I'm a bit dubious on why my spring guide is rocking so much once in place, much more than my Tavor's.

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Put the bottom stock pin in 3/4 of the way, put the top pin 1/2 the way in, then use a thin screwdriver etc to guide the top pin straight, give it a tap with a hammer and the top pin should go in straight, then knock the bottom one the rest of the way in.

 

Should work.

 

its still a really tight fit for me, i guide it but i have to pry it to the side and tap the other side hard basically to force it in. is that normal?

 

 

also whats the biggest battery anyone has tried to fit in the standard handguard? not including lipos...

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Hey all,

 

For those of you who do mod your ACR's, I've found out that the stock piston is marginally shorter a Super Shooter one, it's almost 1 mm shorter. So please be aware when you're swapping pistons, the added length of a 3rd party piston can & will cause lockups. Meanwhile, the red Element is in between the ACR's and teh Super Shooter, and that so far has been cycling fine.

Edited by AnakChan
  • Like 1

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Anybody heard anything official on the accessories?

 

Dingodogs have posted on their facebook page:

Arriving in stock soon:

MAGPUL PTS AAC LTD EDITION MASADA SUPPRESSORS AND FLASHHIDERS IN BLACK AND DARK EARTH!

MAGPUL PTS AAC BLACKOUT FLASHIDERS CW & CCW!

MAGPUL PTS MASADA SINGLE POINT SLING ADAPTORS!

MAGPUL PTS MASADA ALLOY FRONT RIS HANDGUARDS IN BLACK AND DARK EARTH!!!

...MAGPUL PTS MASADA 10.5" CQB BARRELS!!

LIMITED STOCKS WILL BE AVAILABLE!!

 

:D

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I just got my PTS Masada a few weeks ago. FDE #1649. I was running a 9.6v 1300 Mah in it but was thinking of picking up a lipo. I read all 70+ pages and I see not to run a 11.1v lipo in it, run a 7.4v instead. Does anyone have a recommendation on mah or C rating? If it was posted in this thread I either missed it or I am in information overload and can't remember.

 

BTW no problems with mine using .27 Bioval clears, although my MAG Brand 130 round midcaps wouldn't lock in until I modified the mag. Everyone else's didn't seem to have any problems. Weird.

 

Crash

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You may have missed, I believe kithooton stripped his with a 11.1V. I believe he wasn't the first either. I've got my highly modified ACR of which I use 7.4V 1400mAh 30C. But I'm also in Japan so I'm not pulling crazy springs here.

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So I was at the game with dStole and mine's one of the ACR's with issues above. Probably to clarify the 3/4 at the game yesterday, mine was the heavily modified one which to be honest, I think I can hardly call it "PTS" anymore therefore I'd blame my mods rather than imply a PTS issue.

 

The 2nd (presumably YCare's replacement/repaired PTS ACR), I'm prepared to place a bet that his lockup issues is caused by his "rocking" spring guide. The spring was changed to be JP compliant and was longer and cut on one end. I believe it's an installation error of which when the spring guide end screw was put back into the spring guide, it was already at an angle rather than flush. I fixed his problem in the afteroon - I don't believe he had any problems after. However I think he still should :-

a) find a shorter spring but same power

B) flatten/flush the end of the spring that he cut

c) ensure the spring guide is flat/flush on the mechbox end before he screws in the bolt

 

I'm finding out the issue with the 3rd one later today, and if you can give me a look at the 5th (the one I was supposed to look at) I can see what's wrong with it. But for now I won't be so quick to blame a 5/7 or 71% failure on the PTS yet. I think it's time for more information and more details before any conclusion.

 

As an update to this, for the 3rd person having a problem with his ACR, he lost the pin-retaining clip. So as far as I'm concerned, all 3xACR failures weren't manufacturer's defect/design/fault.

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That's good news AnakChan. Glad that my concerns aren't as pressing as I initially thought, and that the majority of the issues look to be user related.

Edited by dstole

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Just out of interest and baring in mind what has been said about rail size/width and overall length, which pistons have people used and can confirm work in the ACR without need to modify them?

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So yeah, changing the hophup to the Guarder 50% and using 0.25g made night and day for me. Went from spraying the 20m target with 1/30 hit to something like 2/3. Very satisfied with that.

 

On the other hand, the ACR did lock up again, for what AnakChan said, the spring was a cut one, and somehow maybe not properly installed (although I was able to install springs on my Tavor via the same way without any problem). So I replaced it for a System irregular pitch 1J, which brings the output to a ~0.86J, which is lower than the spring I was having lock up with (was around 0.94J), and somehow it seems like fine now, but I'm a bit dubious on why my spring guide is rocking so much once in place, much more than my Tavor's.

 

Last Sunday My Hop Up just didn't work anymore. I do follow rules. Hop up off to take barrel off etc.

Retail Thought to be soft rubber issues. Changed it with a Madull 60%. Amazing again. I have hop up! better than before.

 

I dont know the name of the bit, but the hop up unit, the wheel. the rubber thing that moves up and down in the gun to put pressure on the hop up rubber bucking thing. lol.

 

I have been told it is a shape like the Number 8. One part is sold and the other part with a hole. .

This was Crushed on hole side, and it was very soft . This could be due to early attempts of removing barrel and puting it back without thinking. It is replaced with a hard one. problem fix wink.gif

 

 

Anybody heard anything official on the accessories?

 

Dingodogs have posted on their facebook page:

 

:D

 

Been in contact. Very Soon like 2 weeks away i hope for RIS.

 

 

You may have missed, I believe kithooton stripped his with a 11.1V. I believe he wasn't the first either. I've got my highly modified ACR of which I use 7.4V 1400mAh 30C. But I'm also in Japan so I'm not pulling crazy springs here.

 

Indeed I did. Destroyed the stock piston. But i Do run a 11v now and its working very well. Feeding only with BB Brands Madbull & Excel for full auto. Others Brands Miss feed for Me.

 

 

Just out of interest and baring in mind what has been said about rail size/width and overall length, which pistons have people used and can confirm work in the ACR without need to modify them?

 

My retailer used a Prometheus Piston, Don't Quote on Me what type or number. But he only took off the some teeth out. Fits in well. No Lock ups. Still Custom tho.

Edited by kithooton

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[snip] but I'm a bit dubious on why my spring guide is rocking so much once in place, much more than my Tavor's.

Your Tavor has a different gearbox design. As with my recent experience with piston tolerances for the ACR mechbox, even sub-millimeter differences can cause issues.

 

[side note]: This isn't specific to just PTS and/or Ares mechbox but in general to other brands - even with TM. If memory serves me correctly, there are specific gear sets for V2 vs V6 as the V6 offset is slightly different.

 

Just out of interest and baring in mind what has been said about rail size/width and overall length, which pistons have people used and can confirm work in the ACR without need to modify them?

Probably more towards the first 1/2 of this thread, I read of others breaking their pistons too (so kithooton, you're not the first). However I see others recommending TM std pistons, etc. but don't recall what the owners final choices were. Over the weekend I can try the Angel clear piston, but for now the Element orange full teeth's my working replacement.

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If a piston isn't compatible, it's usually because the piston teeth are slightly too close to the sector gear, causing excess friction. It's caused by the sector gear bushing hole being too close to the piston guide rails on the mechbox itself. This can be overcome by sanding/grinding down the piston guide rails on either the piston or the gearbox, piston preferably. This is common to many gearbox shells. It's better to modify a decent piston than choose an inferior one just because it fits the Masada gearbox with no modification. So I'd say go with your first choice of piston and sand down the rails of that piston until it meshes well with the sector gear. None of the other dimensions should be an issue, as with most AEGs.

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Good tip and I did notice the Supershooter was a little closer to the sector gear than the Element. However in my case at least, the length had a lot to do with it too. These are standard pistons of which I believe are more for a tolerant std V2 mechbox, but it appears PTS (no I'm not ready to call it an Ares :D) V2/V3 mechbox is somewhat less tolerant.

 

I attempted to take a snapshot of all 3 pistons without a ruler so it's hard to see.

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I have some calipers arriving this week, hopefully today, so I'll measure a few pistons for comparison.

 

Can you be more specific about how piston length was a problem? Too long and unable to fully cycle?

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