Cyma M14 - needs a bit of fettling

[Spencer6277]

The prommy 6.03 barrel is a good clean barrell. I've got one in my TM M14 long version. The barrell is 500mm so end up abit pricey. Good quality barrel inside and out. Just needed a clean. The only thing I find about them is the window is abit narrow. Not alot of contact patch.

The maple.leaf Mr Hop never fitted this barrel. 

Ive had to file out the windows to open them up and allow more contact a few times

Best results using a 500mm prommy barrel I find are: Full length cylinder, Flat hop using omega or H nub and prommy purple bucking.

Maple leaf bucking but with a little window work 

Or Rhop - IRhop. 

I personally run an IRhop.

420 fps .4s are gone

ZCI make one and I'm sure it's a 6.02. You can get these in any length and they have the m14.cut on the barrell. Which means you can short stroke the 18:1 by a tooth or 2.

Ive SS my M14 AR by 1 tooth and run a 363mm 6.02 for a snappier trigger and over volume for those heavier weights

The window is wider on these so you can use maple leaf MR hop etc in them. I have had a couple that haven't fitted as nice and again filled down the window to open the gap up atad 

Or just Rhop this barrel

Elvish tac make a drop in patch for the prommy one and maybe the zci. To be honest they are small I think. I make mine instead for myself and customers. 

AOLS also make a 6.02 or maybe 6.01 cant remember now. The clean closet to the ZCI in quality and over appearance. probably out of the same factory.

If you are looking to do internal work then thats a whole other story 

Alot of pitfuls and sourcing parts.

Tbh the internals for the CYMA variants aren't great. Most.of it comes out when I build one of them.

Only real part that's left is the tappet plate as they are specific to Cyma. Shs tappets do not feed in a cyma. Or not many. 

I generally just work on V7 m14s for myself and customers. So any questions let me know mate. 

 

[RostokMcSpoons]

Bah humbug.  
I bought a tap bit set to open up the front mounting hole on my M14 so I could properly fit the Aliexpress scope rail thing on to it.... turns out I have M4/5/6 and it looks like I need an M5.5  Damn it.

Anyway that's the small fly in the ointment of life, which I'm sure I'll sort out.. next problem is I noticed my bolt hold open catch was no longer working.
And when I was inspecting it, it fell off the rifle!    So I now have a short pin, the actual catch itself... and that's it.  I rather suspect there was a spring involved in the system which ought to have kept the catch in enough tension, but that's gone walkies.   Again, I might be able to find something in my Box Of Bits, but was there anything else?  Even when the catch was still in place, it didn't seem to actually hold the bolt open, however I manipulated it

 

[-davo-]

If it's the part I think you're on about, it screws in with a tiny ass screw - very losable
That part of the gun is generally only aesthetic anyways
On other guns, that's how you get to the hop wheel
but with CYMA/TM it's underneath next to the magwell

So it's just for show
You could probably source replacement parts if needed

 

[RostokMcSpoons]

I had a (very minor) brainwave.  I was trying to source a small spring to fit into the pair of small recesses (one in the body, one in the catch), without re-using something from one of my other guns.
 
The spring from a retractable biro, cut down to a couple of spirals, was just about the right size!
And it damn well actually works, the hold open catch works again.  

It'll probably fall apart again the next time it takes a knock though...