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Posted: 1/23/2006 6:47:22 PM EDT
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the front sight and gas chamber didnt come predrilled, just have a place to start 2 holes on them. When i reposition the parts into place, will the drill bit do the rest? i want them to be nice clean holes. I have 1/8 drill bit and 1/8 dowel rod, will i need to use a smaller drill bit and work my way up? i dont want to mess this up. what type of drill would you guys recommend? Shawn |
Thanks, i have all the old parts off the gun, and getting them prepped for the new parts to be installed and drilled. I had to cut the front sight off but the gas chamber came off nice... Shawn |
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Grind a small flat on the bottom of your barrel where the FSB slips over. Grind it square to the front trunnion. Drill and tap for a small set screw on the bottom of your FSB. Mount the barrel in a V/block on the mill and indicate the front trunnion sqare to the mill head. Use an indicator to pic up the two existing FSB pin holes on your barrel and then write down those locations on a piece of paper. Mount the FSB on the barrel without moving the barrel any and tighten the setscrew and it will locate itself square via the small flat you ground. Take an 1/8 carbide endmill and cut the holes out with small pecks until you went through the FSB and barrel. This is how I did mine anyways. |
| drill press and a carbide bit. I can't imagine being able to do it very well by hand. the press ought to have a self centering jig that allows the barrel to be held perfectly so the bit can find the exact center of the barrel before you even start drilling. use LOTS of oil....and let the bit do the work...g |
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ok guys, found my titanium drill bits and got access to a drill press. i will be drilling tomorrow so if anyone has anymore advice, speak up. I will need to figure out a way to center the front sight with the drill bit, but once i do that, it will do the rest itself. Shawn |
Your drill bit will walk and wont make a straight hole. You need a center drill if your FSB doesnt have holes in it. You should have a way to drill through the existing holes so dont butcher your barrel. I suggest a mill. Sometimes theres only one way to learn though 
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Hey, There are already places to start the holes. The barrel was already drilled with the previous sight/gas chamber so i wont be drilling thru that. Im using a 7/64th drill bit for the holes. I will let you guys know the outcome. If worse comes to worse i can always use my 1/8 dowel rod for retaining pins. Shawn |
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