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[1] Strength of Fasteners

[2] Whittlin’ out a GRT-III Trigger

[3] 0.156" Open Bolt Automatic for #4 Birdshot - Build Log

[4] AA S410E mod to get a longer hammer stroke

[5] Barrel lenght vs. fps suppressed

[6] MAC-10 Style BB machinegun with pop-off valve - concept

[7] "Sabotless" Semi-Automatic Shotgun - concept

[8] Dump valve gun breakdown video

[9] regulated PCP design with "pre-chamber" and "dump all valve"

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