A Tac8 is what quite a few people will recommend. Since you are used to the RAM99 (and experience with real steel as well I assume), you should find the Tac8 similar in operation due to its magazine system.

A Tac8 is rather pricey, though, and you may want something cheaper or you might prefer standard spring feeds and 12gram changing - in which case there are a myriad of options available. Some names I'll mention are Ariakon and Warsensor, who make the Overlord and the Zeus pistols, respectively.

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