NcStar Aluminum AR / M4 Buffer Tube i4 Mounts onto the AR-15 flast-top

Mounts onto the AR-15 flast-top receiever

directly onto the Picatinny rail

Metal Mil-Spec Buffer Tube

Technical functions: ECU (Electronic Control Unit)

NcStar Aluminum AR / M4 Buffer Tube i4 Mounts onto the AR-15 flast-topThe NcStar Aluminum M4 style AR Buffer Tube is NcStar's newest buffer tube system which can be used on real AR platforms or airsoft guns that accept AR M4 buffer tubes (GBBs, ERGs, AEGs etc.). Be sure to check your gun before ordering for which style it is. Milspec and Commercial are slightly different. Commercial Spec 6 position AR buffer tube and castle nut. Designed to fit Commercial Spec MilSpec collapsible buttstocks. Made of precision machined