A friend had this problem. He's not around for a while so I cannot check.
If I remember correctly it was a bad mag catch spring.
Maybe someone else can confirm.
If you are set on 9+1 how about just adding a +1 cap?
https://www.shooterssource.com/shotgun-performance/shooters-source-1-2-mxt-extension-caps.html
I have a +6 tube for 10 and the +2 cap brings it to 12
The +5 should give 9
Measuring instructions here
https://www.shooterssource.com/shotgun-performance/nordic-components-12-ga-shotgun-mxt-tube-extensions.html
With those basepads, New Para mags and grams springs and followers I get 22 rounds
I did use the inserts from the para basepads. They did have to be modified a bit to fit,
basically sanding the cicumference.
I wouldn't sell the factory mags.
You can buy these base pads
http://www.gunpartscorp.com/ad/1371120.htm
Use grams springs and followers and you should get 22 rounds.
Old made made in Canada mags with Dawson pads also work for me but you need to use the aArredondo inserts and a different follower.
I've been using the first option without issue for quite some time.
Agree.
I've played the 20 questions before only to have 'the buyer' back out or end communication and during that time a second or third interested party pass because they found the same item or something else.
Grizz,
I have those basepads and they will fit para mags that i got from PARA
they will not fit (lock) the mecgar mags.
they are too short- the mags that is.
tonight or tomorrow I will take pics.
It Might be possible to grind the pads down enough to lock but in stock form they do not fit.
Others' experience might be different
Vert and horizontal should be .5 MOA not .25.
in case you actually use them.
Otherwise looks ok
you have 3,4,5,600 pretty much spot on.
I dont use the zero offset feature so no comment on that.
There is s roll pin about 1" from the front of the loading port drive it out with a punch and small hammer towatds the top of the reciever and drive it in in the same direction. Prior to removing the latch note where the springs are located for when you reassemble. This is a picture of where I filed down and polished. I started with a half round needle file and finished with progressive grit wet dry sandpaper taped to a shotgun shell to match the contour. And finished with a dremel with a felt wheel and some flitz metal polish.
Some considerations with this
Its been mentioned here and i also talked to a few smiths
-drive the rollpin out from top to bottom
if you go bottom to top and use the wrong punch or make a mistake you risk enlarging the hole and them the pin can come loose, move past the receiver bottom.
At best you coud chew up you hand/fingers on the reload. at worse the pin might work itself out during a stage
-Be careful with polishing the shell latch. If you go to far or do not keep the angle on the backside you could get doublefeeds and then the shotgun is pretty much locked up.
I would buy some extra rollpins and a latch or two before doing this.
you can actually get both on amazon.
I learned the hard way about both of the above.
I still have one. Shot it for about 2 years. Its on my limited gun now.
Mine might be different- its the pencil .625 from a few years ago.
I cant tell you about group size but never had a problem out to 400 on MGM flashers or Larues ( other than me that is)