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Posted: 12/27/2011 5:38:19 AM EDT
| Inch or Metric? |
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I'm guessing you mean an imbel upper not lower. Otherwise your all aussie hardware wouldn't fit a imbel lower. (The upper is the receiver on these, not the lower in case you didn't know)
Might also be a magazine to receiver fit issue. check your magazine well, if the notch that receives the tap on the front of the magazine is a wide rectangle slot, it's inch mag cut. If it's a portion of a cylider cut that covers only a third of the mag well width then it's metric magazine cut. If it's inch cut and your using metric magazines with the little bird's beak punchout tab you may not have a good magazine to rifle fit. A bit of wobble or a low hanging magazine will hamper good feeding. An inch magazine will have a welded on plate on the front instead of a mag body cut punchout. Also just getting some wear polishing on the receiver rails after a few hundred rounds might smooth things out for you too. |
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Quoted:
I'm guessing you mean an imbel upper not lower. Otherwise your all aussie hardware wouldn't fit a imbel lower. (The upper is the receiver on these, not the lower in case you didn't know) Might also be a magazine to receiver fit issue. check your magazine well, if the notch that receives the tap on the front of the magazine is a wide rectangle slot, it's inch mag cut. If it's a portion of a cylider cut that covers only a third of the mag well width then it's metric magazine cut. If it's inch cut and your using metric magazines with the little bird's beak punchout tab you may not have a good magazine to rifle fit. A bit of wobble or a low hanging magazine will hamper good feeding. An inch magazine will have a welded on plate on the front instead of a mag body cut punchout. Also just getting some wear polishing on the receiver rails after a few hundred rounds might smooth things out for you too. . |
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If it's an imbel upper you likely wouldn't have a problem. There are a bunch of varieties of Century uppers; metric Imbel with just their name written out, imbels with a combination of metric and inch cuts, argentine metrics, domestic cast century receivers of the unibrow and widows peak feedlip variety. The imbels and argentines are real deal made by military suppliers in their home countries and are TOP quality. The military grade receivers are sought after, the domestics, not so much. Basic rule of thumb is if it's a century and it runs well then just keep shooting.
If you have a foreign military receiver it could be poorly assembled by century or someone else, check for barrel timing (a fair indicator of an issue is the rear sight is all one side or the other indicating the front sight is tipping to one side or the other). Straigtening it can fix a host of ailments. I'd definitely think twice before moving from a military grade receiver to a commercial. The domestic cast centuries have some issues that can usually be fixed by a FAL knowledgable builder. I don't have that kind of experience adjusting the feedlipsramps but know that it's done. Sometimes adjustments to the inside receiver rails are made as well. I have a friend that likes Century and gets them to run. I call him Dr. Dremel. Then again, fair warning, some guys go nuts with a dremel and ruin receivers so don't go that route unless you research it first. other ideas to check -lubed well? they like oil on the bolt rails (dry piston/gas system up front) -action springs in the stock in good shape (not worn out or busted) -check to see if barrel is timed correctly; a barreled under or over tightened to the receiver will have some gas piston drag -already mentioned magazine type, not all inch cut receivers like metric magazines. -might also want to clean the interior and lightly lightly oil the inside of the magazine and make sure there is no rust growing in there. -oh yeah, read up on the FAL gas system, If you undergas it, you can have some issues, pretty hard to overgas it to failure (but you're beating the crap out of your rifle needlessly) wander over to FAL files and read up on setting your gas setting. I'm no FAL expert, just some jackass who reads a lot and I do own a century on an inch cut imbel. Mine runs well. |
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