From the manufacturer:
For all those looking for the lightest, smallest ARCALOCK rail on the market – here ya go. Weighing in at just 1.5oz, this will fir forend hole spacings of 2″-3.5″, just like our extremely popular IBR. The rail will also come with t-nuts and hardware to allow you to install the rail closer to the magwell for tripod use.
MLOK HARDWARE NOT INCLUDED
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