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2/23/2008 10:08:12 AM EDT
I want to put on a flip up front so I don't have to use a riser on my red dot.  How hard is it to change the stock front sight/block and install a railed block?  Could I do it myself or wold I have to pay a gunsmith?  It's a bushy if that makes a diff.
2/23/2008 10:28:42 AM EDT
[#1]
Not hard at all.

Basically:

- Remove FH.
- Knock out FSB taper pins.
- Slide FSB from barrel.
- Instl new gas block IAW mfgr’s instructions.
2/27/2008 3:44:40 PM EDT
[#2]
Update got as gas block today and I've removed the two bottom pins and the upper pin,  is that all?  It looks like the bottom pins were sunk into the barrel.  Is the sight going to slip off or am I going to have to ruin it by grinding it off?  Please reply asap!
2/27/2008 4:01:46 PM EDT
[#3]
Just give the base a few firm taps with a small
brass mallet and it should slide right off.
Also, maybe wrap a little masking tape around
the barrel right behind the FSB,
just in case your as ham-fisted as me.


ETA-Tape is to avoid damaging finish,
    Remove when done.
Double-
2/27/2008 4:04:52 PM EDT
[#4]
I had a problem installing the new gas block when I did mine last month.  If it's too tight you can wrap some 400 sandpaper around your finger and work the inside of the block, should slide right on after that.
2/27/2008 5:24:32 PM EDT
[#5]
OK thanks.  I soaked it in some breakfree and it loosened right up and slid off.  Any tips for putting on a rra clamp on railed base.  Is it hard to line up right?  Also how do you get the gas tube out of the front site.  It acts like its stuck.  Iremoved the little roll pin but it wont budge.  Is there something I missed?
2/27/2008 6:17:17 PM EDT
[#6]
The gas tube can be removed by loosely clamping vice grips on the tube and lightly tapping them with a hammer.

As far as the gas block goes, this might help.........www.ar15.com/forums/topic.html?b=3&f=118&t=359350
3/10/2008 1:59:28 PM EDT
[#7]
LOL I know Olly's are hated on this site but I would like to change the "Cheap" looking front sight with a Low Profile Gas Block. Is there certain measurements one must know about? I have a Button M-4 Barrel by Olly. I see a ton of aftermarket Gas Blocks, some I really like. Do the all pretty much fit the same?
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