This is a quick AR-15 build tip on how to account for the added length of your castle nut/armorers tool when setting your torque wrench. Simply setting your torque wrench to 40 ft/lbs will not give you 40 ft/lbs on the castle nut… it will be way over-torqued.
AR-15 QUICK TIP – CASTLE NUT TORQUE: Calculate Proper Torque to Avoid Stripped Buffer Tube Threads


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