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Barrel Extension with M4 Feed Ramps
A Nickel Boron coated barrel extension with M16/4 feed ramps for your M16, M4 or AR15.
This EXO Nickel Boron coated barrel extension provides a permanently lubricious surface for extreme durability and increased wear and corrosion resistance.
Note: This barrel extension has upgraded M16/M4 feed ramps.
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