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Range is a mixed bag, people keep saying it lifts 0.45s out of the box, mine struggled to lift 0.3s until I swapped the hop rubber, now it reaches 60 REAL metres easily.
I don't really check groupings, it's meant to be a close range gun but I've had some pretty accurate first shots up to 50 metres.
And yes, with a drum and a stock it turns into a very fun support weapon, until the hammer explodes