MI HANDGUARD SP SERIES 18"

M-LOK AR-15 SUPPRESSOR COMP. FEATURES:Inside diameter 1.75" Outside diameter 2.0"1.95" over mounting flatsHigh quality MIL-STD 1913 top railOne five slot Magpul M-LOK polymer rail section includedConstruction from 6061 aluminum, hard coat anodized Barrel nut and barrel nut wrench includedWeight: 16 ozMade in USA