FEATURES: Allows for carbine buffers and springs to be used in rifle length buffer tubes Works with A1/A2 buffer tubes Machined aluminum billet cylinder Black anodized finish Spike's tactical spider logo etched on end of cylinder Does not add buffer weightBENEFITS: Allows for the use of existing carbine buffers and springs in a rifle length stock, no need to purchase a new buffer and spring Spike's tactical ST buffers can now be used in a rifle length system Spacer is easily removed and installed, no gunsmithing required Solid aluminum construction and tough anodizing ensure that this spacer will last Mfg: Spikes Tactical