6-Position Receiver Extension Kit (stock not included) for your AR-10® rifle. *Compatible with Armalite AR-10® A and B Series Rifles. Kit does not include buttstock. Kit includes: EC0057 -Ambidextrous Receiver End Plate|EC0053A -Collapsing Buttstock Lock Ring|10207025 -AR-10® Receiver Extension Tube|EA1095 -AR-10® Operating Spring|EC0120 -Tungsten Weight Buffer (x3)
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