JE Machine Tech DPMS Platform Mil-Spec Buffer Tube w/ 3 Drain Holes Black. 25 in Features of JE Machine Tech DPMS Platform Mil-Spec Buffer Tube w/ 3 Drain Holes 6 positions Package Contents: JE Machine Tech DPMS Platform Mil-Spec Buffer Tube w/ 3 Drain Holes What firearm models does the manufacturer say JE Machine Tech DPMS Platform Mil-Spec Buffer Tube w/ 3 Drain Holes is compatible with? The manufacturer says that JE Machine Tech DPMS Platform Mil-Spec Buffer Tube w/ 3 Drain Holes is compatible with AR-15JE Machine Tech PS-BTM-DH: DPMS Platform Mil-Spec Buffer Tube w/ 3 Drain Holes Black