It's a gas operated. Choked I/C so it's the perfect thick cover gun for grouse and I've used it for quail in Texas as well. You're absolutely right that the little 20 is light. It handles very well and points where you look. The only downfall to the gun is the choke. I've often thought about sending the barrel out to have a custom set of chokes made for it but I've never been able to bring myself to it. The gun was my grandfather's so it has a little bit of sentimental quality to it as well.
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