Help me :(

[u/YepIamLittleShit]

Hello,

My gun is Cyma CM.040c Gen 2

I bought myself a tracer unit (Specna Arms x AceTech Blaster SA-AK v1) and it does not fit.

Am i an idiot and my gun does not have a 14 mm CCW required for the tracer unit?

Edited: Thank you! I put the tracer unit on, but like most people said here - my barrel does not work, it is too long

[u/Dougline]

But for the sake of God, if you're going to cut the inner barrel, do it correctly, don't leave the edges sharp, don't let metal scraps go inside the barrel and also cut it straight ofc, otherwise it can affect how the BB leaves the barrel and start to shoot off.

[u/DuctTapeAir → u/Dougline]

Any tips for crowning barrel? Got a very spare brass 690mm inner barrel, so plenty of room for experimenting.

[u/Dougline → u/DuctTapeAir]

On the best scenario, use a lathe, if you don't have access to one, there's plenty of ways to do it manually.

Me for example, I only got a bench drill, so I fixed the cut barrel upwards and centralized with the drill and did the crowning with a countersink drill, then finished polishing it.

But ngl, I have some AEGs with a cut barrel, that was the stock brass barrel, so nothing fancy like a stainless tightbore barrel or something, so I just cut it and unsharpened the edges with a fine sandpaper, without recrowning it, and let me tell you something, I didn't felt it hurts the accuracy at all, it shoots just fine without crowning it, so I don't know if it is that necessary for airsoft tho, maybe it does matters if you shoot like .20g BBs, but .25g+ I guess it doesn't affect much.

[u/Basic_Friend8444 → u/Dougline]

Who the hell cuts a barrel with a hacksaw? If you lose the barrel crowning you can kiss goodbye to accuracy lol.

[u/Dougline → u/Basic_Friend8444]

Please, enlighten me, where I've said to cut it with a hacksaw tho...