I for one reccomend the HK416 lol, gearbox can be modified to fit the VFC if the shell breaks, the stock wobbles no more than a real M4... but in actual fact its just still an airsoft M4 in a different body, a very nicely finished body mind you. Sure it cost me $1200 but it was worth it for an HK collector like myself who demands top notch external finishing.
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