Shotshell primer perimeter alarm system with Kevlar tripwire and my added touch, a modified junction box for weather housing and holes to feed vines or camouflage netting through. : r/Survival

FithOPS Camp Safe Perimeter Trip Alarm - Fith Ops

homfanseec Perimeter Trip Alarm, 12 Gauge Camping Trip

Perimeter Trip Alarm, Camping Trip Wire Alarm Device

12ga. Camping Trip Alarms - Unusual shell loads!

12ga. Camping Trip Alarms - Unusual shell loads!

Trip Alarm Co – Perimeter Alarm & Trip Alarms

Trip Alarm Co – Perimeter Alarm & Trip Alarms

Fith Ops™ Perimeter Camp Safe™ (209 Primer Only) Trip Alarm

12ga. Camping Trip Alarms - Unusual shell loads!

homfanseec Perimeter Trip Alarm, 12 Gauge Camping Trip