HomeSRU M11 GBB Bullpup SMG Kit For KSC/HFC 3D Printed Conversation Kit Fit To KSC M11 GBB Gen 1 (N1), System 7 (N2) Fit To HFC M11 GBB Gen 1 (N1)SRU M11 GBB Bullpup SMG Kit For KSC/HFC Tan$149.00PriceQuantityAdd to Cart