NAA mini misfires

great scot · May 21, 2007, 02:31 PM

I own a North American Arms .22 lr mini. It is a fun little gun, but the last time I took it to the range, I got a lot of misfires. I was using a Winchester high speed load and some Stingers. Has anyone else had problems like this and is this something I have to send back to North American Arms or can a reputable gunsmith fix the problem? I didn't alter the gun in any way besides adding a different set of grips. Thanks for the help.

Majic · May 21, 2007, 03:00 PM

When you changed the stocks could the stock screw possibly be contacting the mainspring?

kayakersteve · May 21, 2007, 03:06 PM

Hello - I had the same experience with mine - here's what to do.

1- Call NAA; they will send you a new main spring (free) which will usually fix the problem - it didn't work for me
2 - In my case, I had to send my gun in and they basically rebuilt it FOR FREE. The service was great and now no (0%) misfires.

You wont be disatisfied; they have great customer service

great scot · May 21, 2007, 04:46 PM

Thanks for the advice. I'll start with looking at the stocks, move on to replacing the main spring, and then send it in if all else fails. Once again, thanks.

Double Naught Spy · May 21, 2007, 06:55 PM

What I found out on mine is that after 5 or 6 cylinders of shooting, the chambers start to get dirty. When they get dirty, the cartridges don't always fully seat when you drop them into place. They may not be off by very much, but it can be enough that the hammer strike is offset by the impact first moving the cartridge forward slightly, pushing it into the cylinder grime that acts as a sort of buffer. As a result, not all of the energy goes into the causing the detonation and the little guns don't have a lot of spare hammer energy.

Clean all five chambers of the cylinder very thoroughly. Your rounds should be able to drop in fully without any pushing on your part. When you invert the cylinder, all 5 should drop out. Assuming your gun has the same problem as mine, then cleaning the cylinder thoroughly should produce the results you expect. Since having diagnosed this problem in my own gun, the misfire problem has gone away.

May 21, 2007, 02:31 PM	#1
great scot Senior Member Join Date: July 17, 2006 Posts: 104	NAA mini misfires I own a North American Arms .22 lr mini. It is a fun little gun, but the last time I took it to the range, I got a lot of misfires. I was using a Winchester high speed load and some Stingers. Has anyone else had problems like this and is this something I have to send back to North American Arms or can a reputable gunsmith fix the problem? I didn't alter the gun in any way besides adding a different set of grips. Thanks for the help.

May 21, 2007, 03:06 PM	#3
kayakersteve Senior Member Join Date: March 17, 2007 Location: Western NY Posts: 925	me too Hello - I had the same experience with mine - here's what to do. 1- Call NAA; they will send you a new main spring (free) which will usually fix the problem - it didn't work for me 2 - In my case, I had to send my gun in and they basically rebuilt it FOR FREE. The service was great and now no (0%) misfires. You wont be disatisfied; they have great customer service

May 21, 2007, 03:00 PM	#2
Majic Senior Member Join Date: May 24, 2004 Posts: 3,888	When you changed the stocks could the stock screw possibly be contacting the mainspring?

May 21, 2007, 04:46 PM	#4
great scot Senior Member Join Date: July 17, 2006 Posts: 104	Thanks for the advice. I'll start with looking at the stocks, move on to replacing the main spring, and then send it in if all else fails. Once again, thanks.

May 21, 2007, 06:55 PM	#5
Double Naught Spy Senior Member Join Date: January 8, 2001 Location: Forestburg, Montague Cnty, TX Posts: 12,793	What I found out on mine is that after 5 or 6 cylinders of shooting, the chambers start to get dirty. When they get dirty, the cartridges don't always fully seat when you drop them into place. They may not be off by very much, but it can be enough that the hammer strike is offset by the impact first moving the cartridge forward slightly, pushing it into the cylinder grime that acts as a sort of buffer. As a result, not all of the energy goes into the causing the detonation and the little guns don't have a lot of spare hammer energy. Clean all five chambers of the cylinder very thoroughly. Your rounds should be able to drop in fully without any pushing on your part. When you invert the cylinder, all 5 should drop out. Assuming your gun has the same problem as mine, then cleaning the cylinder thoroughly should produce the results you expect. Since having diagnosed this problem in my own gun, the misfire problem has gone away.