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Thank you guys for all the info. I think I like the TM M4A1 (RIS) more. I'm just wondering, does the Marui M4A1 have a plastic or metal receiver? Actually for those who own the gun or have the info, do you mind tell me which parts of the TM M4A1 RIS are metal, and which parts are plastic, and if there are kits which let me replace the plastic parts with metal ones? Please let me know, thank you !
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