3 pack cobalt drill bits for barrel assembly.
Includes a 3mm, 5/32, and your choice of 7mm or 17/64 for drilling all necessary holes. (front sight, rear sight, gas block, and barrel pin).
Some builders prefer to drill the barrel pin with a 17/64 and ream at 7mm.
These are the best quality bits you could ask for and for the price you can't beat it .
They are a must have for any hobbyist. Remember use oil an clean your tools they will last a long time .
Nice and sharp! Should work great on build!
Normally, I do barrel pin drilling with mill-end bits but wanted to give these a try. Heck, I was through the trunnion and into the barrel before I realized. Ditto for the front gas block. These bits are quality!
These work very well. Just go slow.
I have not been able to use them as of yet. They look like they can handle it great. The tip looks real good.