5.5" target is too risky, added 1/2" backstop for indoor 4 fpe SP500 pistol. Used rubber feet and picture frame wire for hanging.
$20 for pellet trap on amazon 5.5"
https://www.amazon.com/dp/B07CG56B6S $15 for 2x2' birch plywood at lowes
$3 for ace hardware rubber screw in bumpers
$1 for 4x ace hardware #8x1/2" screws and one #8x1".
$7 for picture frame wire and hanger set at walmart grocery store
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$46
edit: rubber bumpers are on backside at 4 corners to avoid scuffing wall. Wire is hand wrapped around two #8x 1/2" screws in the back and around itself. Longer screw is so I can tilt it down towards me since I have it 8 feet up.
These 5.5" pellet trap cardstock targets are pretty cheap, about 10 cents or less each and made of nice cardstock, got 50 free ones for a $20 target. You can stuff about 10 in there before having to remove some and having old ones in there helps keep pellets contained. One or two microfiber rags muffle it completely.
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