The Geissele SAG is manufactured from hardened steel that has been ground 0.002” under nominal bore diameter. The outside diameter of the alignment rod is finely finished and straight to 0.001” over its length. Geissele hardens the alignment rod so that it will not wear by sliding exposure to abrasive powder residue, pull burrs if it slides against misaligned baffles nor allow abrasive particle to imbed into the surface of the gage.

There can be a wide variation in barrel bore diameters and bore straightness. 0.002” under nominal bore diameter has been found to be the best size of the SAG that will fit most barrels. The long length of the SAG aligns the gage to the bore; it is not necessary to have a very tight fitting gage with the long length of the Geissele SAG.

Bore Size/Rod Length:

• 5.56mm – 15″ Length (10-259-F)
• 6mm – 17″ Length (10-1642-F)
• 6.5mm – 17″ Length (10-448-F)
• 6.8mm – 17″ Length (10-449-F)
• 7.62mm – 17″ Length (10-260-F)
• 9mm – 16″ Length (10-451-F)
• .50 CAL – 17″ Length (10-1641-F)