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View Full Version : Couple of AK questions.


HalfMeltingEyes
12-03-2010, 11:33 PM
First question:
Should the muzzle device detent fit flush with the FSB when depressed?
If so, is it okay to trim/grind down one that is too long until it it fits flush?

Second question:
If the gas tube is too long to be fitted, is it also okay to trim that carefully until it fits?

-David :)

powderburns
12-03-2010, 11:51 PM
Some muzzle devices have to be backed off a turn or so to index correctly but you could sand the rear portion where it meets the FSB to make it fit more flush.

For the gas tube try filling the area where the little throw leaver pushes against the gas tube. Go slow or it will now be loose. Now if you installed your gas block to far to the rear if you were using a virgin barrel, you may have to chop the gas tube shorter.

Hope this helps.

powderburns
12-03-2010, 11:54 PM
Wait... Are you saying the detent pin sticks out to far?

HalfMeltingEyes
12-04-2010, 8:54 AM
Yep, the detent pin sticks out about 3mm when it is pushed down as far as it will go.

Second question answered! Thanks. :)

Shady
12-04-2010, 9:36 AM
leave your detent pin alone


the more you take off your gas piston the more its going to rattle once fitted

are you SURE its too long ?

is this a rifle your building ?

or are you just having a hard time getting it back on?

HalfMeltingEyes
12-04-2010, 1:13 PM
This is a non-matching Polish underfolder parts kit with a US barrel.
The Gas block, FSB, and RSB were fitted and pinned to the barrel by the importer(I believe).
The gas tube is just long enough that the rear portion will not slide into the RSB if the front portion is positioned to be fitted to the gas block.
http://img.photobucket.com/albums/v296/xXxGRIMESxXx/DSC01293.jpg
http://img.photobucket.com/albums/v296/xXxGRIMESxXx/DSC01294.jpg
http://img.photobucket.com/albums/v296/xXxGRIMESxXx/DSC01296.jpg
http://img.photobucket.com/albums/v296/xXxGRIMESxXx/DSC01297.jpg
http://img.photobucket.com/albums/v296/xXxGRIMESxXx/DSC01299.jpg

When the gas tube is placed along side where it should be with the rear shoulder sitting on the rear sight base, the front section of the gas tube extends about a hair past the shoulder on the gas block.

The detent pin:
http://img.photobucket.com/albums/v296/xXxGRIMESxXx/DSC01302.jpg

Shady
12-04-2010, 2:37 PM
file away
just do it a tiny bit at a time

and again
leave your detent pin alone
there is nothing wrong with it

HalfMeltingEyes
12-04-2010, 2:38 PM
Alrighty, thanks! :)

powderburns
12-04-2010, 9:31 PM
Yep, the detent pin sticks out about 3mm when it is pushed down as far as it will go.

Second question answered! Thanks. :)

Yeah dont worry about that unless it bothers you. If so just file it down but its not like these things were built to super critical specs.

Shady
12-04-2010, 9:45 PM
Yeah dont worry about that unless it bothers you. If so just file it down but its not like these things were built to super critical specs.

DO NOT FILE IT DOWN

Roccobro
12-04-2010, 9:58 PM
DO NOT FILE IT DOWN

Guys, if you think there is a problem with the front detent pin, take it out and inspect it. Like Jeff keeps saying, filing it won't fix anything.

I have come across FSB's that had the detent spring cosmolined up in the hole, and a second spring was *almost* installed on top of it. Would have made the pin not compressible. The ONLY fix is to remove the extra spring. Hell, maybe the disconnect spring was installed by mistake as to exhibit the same symptoms.

Justin

powderburns
12-04-2010, 10:08 PM
As long as you have enough of it to engage the notch in your muzzle device your fine.