Product Description The FAB Defense Offset Polymer M-LOK Picatinny Rail Section allows you to add Picatinny compatible accessories to your M-Lok handguard. The polymer design keeps weight to a minimum. FAB Defense OffSet Polymer M-LOK Picatinny Rail Section 4-Slot at MidwayUSA $16.10 Buy Now Check Price on Amazon Check Price on eBay