N/A Contemplating a Big Bore Bush Gun

Sometimes situations arise that require specific or specialty tools. I’m interested in suggestions for a bush gun- something compact that I can shoulder and shoot at short range in tight spaces like thickets, heavy undergrowth, a pine sappling stand, etc. Might sound strange, but it’s what I want. If I can find something less than 30 inches that would be great! So far I’ve considered:

Evanix Rex-P in .45 (super compact)
AEA Element in .45

Just something I’ve been thinking about on and off. What else can y’all suggest?