Brass Stacker Front Sight Adapter for Mosin Nagant M9130
Front Sight Adapter Ring allows for the use Original Post & Globe front sight (that has been removed during barrel shortening) of a Mosin Nagant 91/30 without permanent modification to firearm. Requirements: You must measure your barrel length correctly in order to choose the proper model. Barrel length is measured from the end of the barrel to the closed bolt face. (Always practice proper handling techniques, safety precautions, and ensure an UNLOADED condition before attempting to measure barrel length.) Close and lock bolt on UNLOADED chamber. Insert a " diameter wooden dowel or other appropriate reference device that will not damage barrel into rifle bore from muzzle end until contact with closed bolt face. Mark dowel at end of barrel, remove dowel and use tape measure or yard stick determine barrel length. Use marked dowel to approximate the Final Fit Position of the Front Sight Adapter Ring model you select. Ensure that you check for any interference the Front Sight Adapter Ring may have with your forearm stock. The Front Sight Adapter Ring is " thick. The standard, unmodified Mosin Nagant 9130 barrel is tapered along its length and is approximately 28.75" long. The forward face of the original front sight is at approximately 27.70". Therefore the forward barrel exposure is approximately 1.05" (forward barrel exposure is length of barrel that extends beyond the front sight). FSAR nominal I.D. sizes: -A).6094", -B).6250", -C).6406", -D).6563", -E).6719". Due to original barrel manufacturing techniques, some degree of inconsistency in barrel tapers may exist. Therefore, the Final Fit Positions given for the Front Sight Adapter Ring are approximations only and may vary depending on individual barrel taper. Complete instructions are supplied. for more information on selecting the correct Model number and installation please look for the Example in the extra images or visit http://brassstacker.com/Mosin-Nagant-9130-Front-Sight-Adapter-MN-FSAR.html.