It may depend on the brand of G36C in question, but you probably will need some sort of extender to get enough clearance from the handguard. At least, I needed one for my Ares G36C. Actually, I used a short thread adapter. My Ares, and many other G36s come with 14mm+ threads, while most suppressors come with 14mm- threads. Just get a short + to - thread adapter, and you'll be good to go.
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