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Specifically get at LEAST something in quality to a BCM. You NEED a gun that has actual QC checks when it's made. As well as a sturdy enough rail...
I'd throw in a handheld thermal monocular for observation. Something like an InfiRay MH25 V2.
Walls of sandbags or dirt piles on the exterior of the trailer will help prevent this.
This was the affordable method of choice for stopping...