What are some mechanical differences between roller-locked and roller-delayed firearms? What parts or mechanisms make it 'delayed' as opposed to 'locked'? - Quora
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Roller bolt mortice dead lock MLC107-55 with passage function
Roller bolt mortice dead lock MLC107-55 with passage function
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Gatelock - Protects your rolling steel doors - YouTube
9100ARL Adjustable Roller Latch - Accurate Lock & Hardware
