How to tell if they are systema?

[Darklen]

Here's a pic of Systema Helicals I have in my G36. The odd angle is from the pic being taken for use for my business banner.

[Dart]

ok cool that helps. Well on the flip side I am impressed that they held up that well against a lipo. It probably has seen about 5000 rnds+ in the last 6 months on the lipo. I don't think my v3 would stand up to that lol.

[Skladfin]

those are stock TM gears.

You can tell from the ditch/hollow on the sector and colour from the bevel and spur.

Those shavings are from normal wear, if you use a 10.8v for a season or two, it will start to look like that sooner or later. Mainly because teeth meshing isn't 100% perfect, so I wouldn't budge about improper shimming(If it's lasted so long with 10.8 or 11.1, then it's shimmed fairly well.). A TM M4 I've had with me for about 2 years, has seen about 10000 rds with 11.1v lipo @ 380FPS. And it looked quite similar to that by the time I opened it up again. Everything looks quite good to be honest.

PS: From the pictures, the entire internals is obviously TM. Stock TM piston/piston heads are one of the best ones out there. I wouldn't really go nuts about it... but it isn't systema that's for sure. Not that much worse either.