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Initial Impressions of the TM SOPMOD M4 AEG

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Ah, thanks for the answer. I was actually thinking about the complete set with the improved recoil weight, but I'm not sure if thats a big difference anyways, I already got the stronger recoil spring from Eagle6. I also have the First Factory castle nut, so maybe I will go for the buffer tube alone, as mine is already a little worn and crooked. 

 

It's a pretty big difference in 'recoil'. You simply cannot get the SURUS any more, not for love nor money - I should know, I tried - but I can put you on to a machinist who made improved examples for myself and Zereck, another user on here. They're of a similar design to the SURUS but are more flexible in that they can be installed as suspended units (like the SURUS) for an improved kick or fixed (like the original weight) for an even harder kick. Drop me a PM if you want his details.

 

Is the method of attachment not a bit different at the receiver end though? Castle nut doesn't seem to be present on the full stock, it's all part of the buffer tube assembly. Or at least that's how it seems from the pictures.

 

Yep, the A1, A2 and some other fixed stocks don't use castle nuts to secure the buffer tube, which in the RS examples is tightened into the receiver with a wrench. As you can imagine, that wouldn't work so well on the soft alloys involved in the Recoil Shock range, particularly because carbine-length buffer tubes don't have the ring (present at the end of the buffer tube's threads) that A1/A2 buffer tubes do, which is what the threading is tight against. Instead, I think the preferred method for Recoil Shocks is to Dremel the inside of the fixed stock until it fits over the castle nut, although I could be wrong.

Edited by PureSilver

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You can dremel over the castle making it thinner but but tbh if I did it again I would just remove the caste nut .. The stock will hold the tube against the gun. So it doesn't wind out.

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PTW stocks are meant to be close to RS dimensions aren't they? It'd be nice to pick up something that's not cheap rattly plastic...

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No - they're on a very limited pre-production basis (I think there are twenty worldwide?) so there just aren't enough to put on sale at the moment. When there's more to sell they'll go on full-scale release, I'm sure.

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PTW stocks are meant to be close to RS dimensions aren't they? It'd be nice to pick up something that's not cheap rattly plastic...

 

I think some genius at Systema thought it'd be a good idea to copy the dimension of a real steel commercial tube size instead of milspec.. I can confirm that both the non-PTS MOE and CTR stock fit the SOPMOD stock with no modification required (provided you've sorted the wiring) 

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Get the real thing, they're pretty cheap, or a GBB-specification G&P or something similar.

 

I'll take a look. Usually it's the getting people to ship them that's the pain, but it's not insurmountable.

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Yeah ive got a pre production on the way hopefully.  Looking forward to testing it out, i will report back any issues.  Its rear wired so i will get a sopmod in and see how much needs to be done from out of box to get it in a normal bog standard sopmod.

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Sold! Cheers for the info, I am definitely a fan of this.

 

I am even considering taking out the quick change system in my TM, selling it and wiring direct to deans.. I knew the quick change system added resistance, but not to this extent.

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The gold contact bar conversion kit should be looked at .. It comes with a handy block which you can screw in place after the quick change has been removed. Then your bars won't slide out after the quick change connections on the stock have been removed.

Edited by Richard Y
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@PureSilver: Thanks for the info, I will keep that in mind if I go through with the complete upgrade.

 

 

Now with the Spectre in mind I'm thinking about rewiring my Socom to the back. What would the biggest 11.1 V LiPo that can be fitted in the Sopmod stock? Is it possible to use both sides of the stock or won't there be enough room for the cables then? Currently I'm running a 11.1 V 1200 mAh tri-panel in the RIS (semi only), but I feel it doesn't last very long with my M120 and upgraded recoil spring. At least the response time drops noticeably in a rather short time. 

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If you get the spectre over all efficiency will go up, you will be able to get a lot more for a lot less battery.

 

You can fit a 7.4v 2000mah turnigy in there if your willing to lengthen the wire that joins the two cells.

 

Also 11.1v 1400mah li ion packs round cells

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CNC end cap turned up in a couple of days from Echigoya. Good service. :) Got a fixed stock on the way. We shall see how well it all goes together.

 

Now all I need is the NG-spectre on general release. And possibly an entire SPR front end. and... well, you know how it goes...

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wondering if people have run into any issues running the gun stock on using a 7.4v lipo but without the fuse? my common sense says it should be fine..  

 

I pretty much did that for 4 years, didn't have any problems, I would have put one in if I had the space but I didn't, and the gun's gone through quite an amount of abuse too. 

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@Richard Y: Thanks, I just thought about Li-Ion after seeing your old 7.4 V 4-cell battery. 7.4 V won't do it for me, but only three of these cells in series should be fine. On the other hand I read that Li-Ion cells don't have a great discharge rate compared to other types and are not that optimal for airsoft guns. I mean it worked very well in your gun, but I have M120 spring, recoil spring, Systema Magnum motor and heavy standard torque steel gears, which taken together seem to need a high discharge rate. I also noticed a significant difference in performance between the original A123 LiFePo cells and the china made firefox LiFePo batteries with the same capacity, which I assume is due to the different discharge rates.

But I guess I can try the Li-Ion if I don't find a suitable LiPo.

Edited by Lord Vader

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