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TM old style delta ring vs new style. Direct replacement

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I have a TM clone M4 (plastic body) with the old style delta ring that you just compress and rotate to remove.  Can I just swap it out with a newer, star style delta ring?  I see some advertised as TM spec for metal body.  Is there a difference between plastic and metal body?  I thought there was just AEG and GBB spec threading for receivers.

I have some RIS I want to fit but they don't fit under the current delta ring hence needing to replace it.

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Keep in mind Tm delta rings often have two cut-outs for the flanges on each side of the outer barrel. This only applies if your barrel has the flanges though. I have never had a problem fitting Tm style delta rings to metal bodies as long as they have the same threading.


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