Isn't the SIG 550 very old?
Might wanna invest in something new or the new type 89 if you want something solid!
I dont hear any creaks from my g36c. Everything seems to fit well and nicely. Your Sig 550 has that stock wobble or creaky noise right? You might wanna get the 551 instead, I think it fixes that problem. But thats if you only really really want the sig.
It's not a popular gun in the field... Invest in a newer gun! :-D
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