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The V31620S Destiny Viper is an extra long life endmill used to machine AR-15's and AR-10's. The Destiny Viper endmill uses their "stealth" coating to greatly increase the life of the endmill. Heat and time is what kills tools and milling with th Ghost Gunner definitely involves both of those so a coted endmill allows your cuts to be cleaner and your endmill to last longer. Some users have reported over 35 lowers with success on a single endmill whereas the standard endmill from DD typically lasts between 8 and 10 lowers. 

Premium 1/4" Endmill

$36.00Price