I always assumed they were the same as their hunting line, Full Lifetime Guarantee... however I just found out that they state this in regards to their tactical line scope warranty "Warranties on Leupold® Mark 4®, Mark 2®, and Tactical optical products vary depending on use and other factors." They give a number to call for more info but I'd rather just ask before bugging them on the phone... Anyhow I'm just wondering - I like the 4.5-14 long range scope. I see this is in the VX III line 30 mm main tube etc target turrets etc etc.. however I have a good price on the Mark 4 model that has the same specs besides being built a tad heavier. The warranty on the Mark 4 would most definitely be better than the vx III? I am only using this scope for long range target shooting and varmint hunting. No military/tactical use is in the foreseeable future. Thanks if you know any details... if not I'll give them a shot tomorrow.