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van7559
11-07-2012, 20:47
I ordered a 300 blkout upper and I think I want to remove the fixed from sight post. What all will be involved. Will need a new gas block obviously I would like a magpul flip up for back up. What am I up against? Any special tools, tips, tricks would be appriciated
BPTactical
11-07-2012, 21:00
Taper pins. Make sure you drive them the correct direction.
A heavy punch and hammer will pop them loose, a good sharp blow is better than light taps.
ray1970
11-07-2012, 21:12
If you're going to hide the gas block under some sort of handguard anyways, I would just chop the front sight base down.

Here is one that Bert "chopped" for me.

http://i102.photobucket.com/albums/m98/rjs1970/utf-8BSU1HLTIwMTIwMzAzLTAwMjI1LmpwZw.jpg
van7559
11-08-2012, 20:19
Fuck might just chop my own ... that came out pretty damn good
SideShow Bob
11-08-2012, 21:35
MagPul recommends against putting them on a gas block due heat transferring causes them to melt.

If you are going with a low pro block and an FF rail, then you are GTG.
ray1970
11-08-2012, 21:54
Fuck might just chop my own ... that came out pretty damn good

Bert (BPTactical) does awesome work. I have cut a few of them down myself and they look just fine but not as nice as the one he did for me.

I like to chop the sight bases and use them as gas blocks because A: it cost me nothing but time, and B: I like my gas blocks secured with taper pins and not some sort of set screws.

If you opt to do it yourself, I recommend a cut-off wheel to chop it and a file and some sandpaper to smooth it out. I usually just touch mine up with some "barbecue pit" paint when I'm done.
HoneyBadger
11-10-2012, 17:08
If you're going to hide the gas block under some sort of handguard anyways, I would just chop the front sight base down.

Here is one that Bert "chopped" for me.

http://i102.photobucket.com/albums/m98/rjs1970/utf-8BSU1HLTIwMTIwMzAzLTAwMjI1LmpwZw.jpg


I am in the process of chopping mine down right now. i can throw up a few pictures if you want. I just took the top off for now, but it only took about 5 mins with the dremel.
van7559
11-10-2012, 17:14
lets see some pics.. did you just cut it with a cut off wheel, the shape it?
HoneyBadger
11-10-2012, 17:22
I haven't gotten around to shaping it yet, but I plan to make it look basically like the one posted above. I'm going to use a sanding drum on the dremel to shape it. I'm holding off for a few days until I get some other parts. I can update when I get it done if you want. My biggest problem is that I can't get the darned thing off to work on it... The A2 flashhider was permanently attached. [Rant1]

14999
van7559
11-10-2012, 17:28
Yeah would like to see some after pics for sure
HoneyBadger
11-10-2012, 17:40
Alright, will do. It might be a few days or maybe even next weekend, but if I haven't posted anything by next weekend, shoot me a reminder.
van7559
11-10-2012, 17:49
will do man, how the hell can you tell if the flash hider is permanetly attached? I don't have an upper in front of me to look at, but got 2 ordered and processing as we speak!
HoneyBadger
11-10-2012, 18:41
If the barrel is 16" or more, it doesn't need to be permanently attached. This is a 14.5" barrel, so it needed the birdcage to bring the barrel length to a legal 16". There is a mark on the bottom of the flash hider where it was soldered, making it permanent.

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HoneyBadger
11-16-2012, 22:12
Okay, as it turns out, I will NOT be finishing the modified front sight post project. Part of this build requires me to put on a FF handguard, and I can't do that without removing the front sight post. I can't remove the front sight post because the flash hider is welded on.... So it looks like I have to cut the front sight post off to take the existing barrel nut off so I can replace the handguards. This seems cheaper than cutting off the welded flash hider and then repairing and replacing it. Sorry I won't be able to follow through with the pics and the rest of the project.