JE Machine Tech AR Pistol Buffer Tube w/Foam Tube Cap Black. Designed with a correctly lengthened grip section this AR-15 Pistol Buffer Tube from JE Machine Tech allows for Pistol Stabilized Rifles to run much shorter buffer lengths than standard Rifle buffer tubes. The JE Machine AR Pistol Buffer Tube is a one-piece machined tube that is supported and features a chamber end cap. For a great way to make sure your Pistol Stabilized Rifle is shooting it's best choose the JE Machine AR Pistol Stabilized Rifle Buffer Tube. Specifications for JE Machine Tech AR-15 Pistol Buffer Tube w/Foam Tube Cap: Manufacturer: JE Machine Tech Color: Black Gun Model: M4 AR-15 Included Accessories: Foam Tube Cap Condition: New Package Contents: JE Machine Tech AR-15 Pistol Buffer Tube w/Foam Tube Cap What firearm models does the manufacturer say JE Machine Tech AR-15 Pistol Buffer Tube w/Foam Tube Cap is compatible with? The manufacturer suggests that JE Machine Tech AR-15 Pistol Buffer Tube w/Foam Tube Cap is compatible with AR-15 M4JE Machine Tech PS-BTP: AR Pistol Buffer Tube w/Foam Tube Cap Black