KAK SHOCKWAVE TUBE Features -12 length adjustment settings.Anti-rotation and anti-thrust design stays put without sliding forward or spinning.Tube is flush with rear of SHOCKWAVE BLADE when fully collapsed.When fully adjusted out the assembly is very rigid..Strong CASTLE NUT design accepts all mil spec endplates and any aftermarket endplate.Accepts all carbine buffer systems..4.546 OZ7.25 TOTAL OVERALL LENGTHOD 1.25 SHOCKWAVE BLADE NOT INCLUDEDPICTURES WITH BLADE SHOW ADJUSTMENT RANGE ONLYADDITIONAL SHIPPING WILL APPLY TO BULK ORDERS