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24 June 2007, 14:49 #2
PRI
The PRI rail mounted front BUIS is manually raised and locked into position. The button on the front left side releases the lock, and allows for the unit to be raised or folded back into its flat/ stowed position. The PRI BUIS is a full shrouded unit.
This BUIS uses a traditional M16A2 front sight post and adjustment methods.




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