AR-15/M16 M4 BARREL EXTENSION

Ready-to-install M4 barrel extension for your next barrel installation project is machined from heat-treated 4140 chrome-moly steel for superior durability. The locator pin hole is already drilled and feed ramps machined in for reliable chambering of rounds. Locator pin included.

SPECS: 4140 chrome-moly steel, in-the-white.