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View Full Version : removing front sight tower ar-15... wisdom and suggestions...


dancinzen
01-14-2010, 12:58 PM
howdy, i just got this upper from superior barrels and it is a real tac driver, so i am gonna designate it a mid range permanent scope upper. but i hate when i turn the magnification down and see the sight tower floating in the recital. so after alittle research i decided to throw a low profile gas block on it. i am no gun smith, but i have pulled apart every gun i have owned and put them back together, so i know i can do it, what i want to know is their any of you out there who have any suggestions or wisdom on the procedure? i got the yhm low profile gas block as that is what superior barrels told me they use on all their other uppers so i thought i would play it safe...

http://i135.photobucket.com/albums/q155/dancinzen/100_1295.jpg

http://i135.photobucket.com/albums/q155/dancinzen/100_1297.jpg

Bing
01-14-2010, 1:02 PM
Pop out the two taper pins from the FSB and slide it off. Just make sure that you are using the punch on the smaller side of the taper pin and you will be ok.

ar15barrels
01-14-2010, 2:49 PM
Get on the pins hard and fast with a decent sized hammer and 1/4" punch.
Don't *****foot around or you will mash the pins before they pop loose.
You want to pop them loose in the first couple wacks.

Then use a smaller punch to push them out.

Full Clip
01-14-2010, 3:26 PM
Here's a tutorial (http://www.varminthunters.com/ar15tech/freefloat/ar15freefloat.html) that helped me.
I switched to a YHM folding front sight as I didn't like seeing the tower in my Aimpoint.

CHS
01-14-2010, 7:56 PM
I do it exactly like Randall suggested.

Get a larger flat punch and whack real hard on the pins to bust them loose, then use a 1/8" punch to drive them all the way out.

You'll need to remove the flash hider to get the tower off, and then get a new crush washer to re-install the hider.

Stormfeather
01-17-2010, 8:32 PM
Dont forget to push out the gas tube roll pin first!

ar15barrels
01-17-2010, 8:36 PM
Dont forget to push out the gas tube roll pin first!

I never remove the gas tube from the front sight base before removing the front sight from the barrel.
I just slide the gas tube off the barrel with the front sight.
This gives me the chance to wipe off all the crud on the tube and inspect it for wear while the front sight is off the barrel.

Seesm
01-18-2010, 4:48 PM
Built 2 uppers today and then re-built one as the customer wanted to change it after it was all done... Pretty easy stuff and pretty fun too.

uscbigdawg
01-18-2010, 7:00 PM
You could just cut the tower and keep it in place too. Dremels and files are your friend.

Rich

ar15barrels
01-18-2010, 7:55 PM
You could just cut the tower and keep it in place too.

It's actually a lot easier that way too.
The barrel gives you something to hold on to that does not get as hot as if you were just holding the front sight base.