JE Machine Tech AR-15/M4 Adjustable 8 Position Fluted Buffer Tube .223 Mil Spec Black. JE Machine Tech built these AR15 Lower Parts with a black hard coat anodized finish to resist corrosion and provide a strong durable platform to support your weapon. The JE Machine Tech AR-15/M4 Adjustable 8 Position Fluted Buffer Tube features three drain holes to displace any built-up gas pressure inside of your buffer tube. With eight different positions to choose from this buffer tube is an incredibly versatile option for those who know how to customize their firearm to perform at its best. Equip the JE Machine Tech AR-15/M4 Adjustable 8 Position Anodized Buffer Tube to modify your weapon to perform at its best. Specifications for JE Machine Tech AR-15/M4 Adjustable 8 Position Fluted Buffer Tube: Manufacturer: JE Machine Tech Color: Black Fabric/Material: 6061-T6 Aluminum Gun Model: M4 AR-15 Gun Type: Rifle Condition: New Features of JE Machine Tech JE Machine Tech AR-15/M4 Adjustable 8 Position Fluted Buffer Tube Mil-Spec Diameter Hard Coat Anodized 7075 T6 Grade Aluminum 3 Drain Hole Adjustable to 8 different positions SAPA Forging / ASTM Certified Short Contour Machining Package Contents: JE Machine Tech AR-15/M4 Adjustable 8 Position Fluted Buffer Tube What firearm models does the manufacturer say JE Machine Tech AR-15/M4 Adjustable 8 Position Fluted Buffer Tube is compatible with? The manufacturer suggests that JE Machine Tech AR-15/M4 Adjustable 8 Position Fluted Buffer Tube is compatible with AR-15 M4JE Machine Tech PS-BTMS2: Mil Spec Adjustable 8 Position Fluted Buffer Tube AR15/M4 Black