B5 SRK EXTENSION KIT BLK
$128.25
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B5 SRK EXTENSION KIT BLK
$128.25
B5 Systems Sierra K Extension Kit, Fits AR15, Black SRK-1660
The Sierra K Receiver Extension Kit is the proprietary mounting system for the Sierra K Buttstock. All parts are made of mil-spec materials and finishes and proudly Made In The USA.