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Posted: 12/1/2012 8:11:53 PM EDT
Well I did get the pins out from my PSA 16" upper front sight base. The 2 large ones were a pain in the @ss!! I've removed many front sight posts b4, never any that felt like they were welded in like this one though. Now The sight still will not come off. The gas tube wont even slide out, it feels welded in there. Yes, I have soaked everything in penetrating oil (break free clp), lightly beat the sight post w/ a rubber mallett & this sucka still wont budge!!!! ..ANY help would be MUCH aprreciated!! thanks,
Dutch |
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You could try some heat. Just heat the FSB up as quickly as possible with a propane torch then try smack it. You just need to be quick before the heat soaks in and expands the barrel also.
If that dosen't work stick the whole thing in the freezer for a few hours to contract the metal in the barrel, then try heat on the FSB again. Make sure to clean off as much oil as possible before doing this, fire bad. |
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Assuming you have removed the gas tube pin and gas tube..... I've done it this way in the past: With the flash hider removed place the muzzle of the barrel on a hockey puck resting on a concrete floor. Take a foot long piece of 2x2 pine lumber and a 16 oz or heavier hammer. Patiently tap/drive slowly working all the way around the flange and strike rather firmly. Don't get too crazy stupid with it just work with a purpose. If you get frustrated walk away and take a deep breath or two. |
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Quoted:
Assuming you have removed the gas tube pin and gas tube..... I've done it this way in the past: With the flash hider removed place the muzzle of the barrel on a hockey puck resting on a concrete floor. Take a foot long piece of 2x2 pine lumber and a 16 oz or heavier hammer. Patiently tap/drive slowly working all the way around the flange and strike rather firmly. Don't get too crazy stupid with it just work with a purpose. If you get frustrated walk away and take a deep breath or two. as mentioned above, the tube will not move at all, feels welded in, most likely from carbon build up. have soaked it in solvent, mpro7, clp, heated it up w/ blow torch, etc... now i am trying the freezer method. I have heard from several other friend that they have experienced similar problems w/ Palmetto State Armory uppers before. I have removed literally dozens of gas tubes, front sight posts, etc from many other manufactures w/ out this type of problem. |
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Quoted:
Well that's interesting! With the gas tube pin out of the equation you still can't remove the gas tube? I hate to ask but: You "do" have the bolt carrier and charging handle out of the upper? Is the gas tube bound up on the barrel nut? yes, bcg, charging handle out. no, the tube is not bound up in the barrel nut, it is bound up in the fsp |
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Quoted: Quoted: Well that's interesting! With the gas tube pin out of the equation you still can't remove the gas tube? I hate to ask but: You "do" have the bolt carrier and charging handle out of the upper? Is the gas tube bound up on the barrel nut? yes, bcg, charging handle out. no, the tube is not bound up in the barrel nut, it is bound up in the fsp Warning potentially bad advice approaching: IF you are absolutely convinced the gas tube is stuck inside the post I'd sacrifice the gas tube by snipping it in half at mid-point and move forward. Worst case you are out the least expensive piece of this puzzle. (a gas tube is under 20 bucks) I'm not feeling the love for this situation as I've never seen a gas tube this firmly stuck in any type of gas block. |
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Quoted:
would need a way to securely hold the barrel and rock the sight back and forth. it is possible that loctite was used to secure the sight as well. Something is definitely out of spec, because I was able to get the FSP to move, barely & it was WAYYYY to tight, too tight to even attempt taking it off. Well I guess the old saying "you get what you pay for" really does apply. Bought the upper assembly on the 4th of July sale for $299 (minus BCG & charging handle). By far the least expensive of my uppers & the only one where it appears to be out of spec. |
well, i got that f%&ker off finally! Soaked the entire FSP in hoppes #9 for an hour than it started moving better & I was finally able to inch the gas tube out w/ out damaging it! Definitely taking many breaks & not using my muscles but instead my noggin' (thanks to you guys) I was able to get 'er off!...THANKS AGAIN! The advice from this board once again, helped me out of a jam!..you guys are the best!
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