ISSC MK22 - Almost fixed
Howdy,
I just got an ISSC MK22.
The Quality Control date stamped on the box was "September 2012".
The main problem with the MK22 is light strikes as per the Gun Nuts thread:
http://www.canadiangunnutz.com/forum/showthread.php?816438-Repairing-ISSC-MK22-with-LIGHT-STRIKE-PROBLEM-OR-MISFIRE&highlight=mk22
ISSC has replaced the rear (vertical) socket head screw (#108) with the M4x16 as the user community suggested.
Still no washer. There is a little bit of play between the bolt carrier group and the "Degree Angle" due to the lack of the washer.
I fired a box of Federal Bulk Pack (525 round) at a pretty decent pace. One failure to feed, one failure to fire (light strike).
The failure to feed may have been because I overloaded the magazine. They are designed to hold 22 rounds, 23 works no problem. 24 causes problems.
The failure to fire was between shot 500-->510, right near the end of the box. When I got home to inspect and clean the rifle I noticed both screws had shook quite loose, but did not fall out. I suspect with some locktight and the washer the gremlins will go away.
The new rifle comes with plastic (fake) magpul style flip up battle sights. Shooting offhand with the OEM sights I was cutting decent holes into targets up to 20 meters away. Beyond that I have problems with the factory sights and my grouping opened up to >2".
So to be short,
no. ISSC did not resolve the problems. All that said, it's a cheap fix you can do yourself on your first cleaning.
I contacted North Sylva Co, the Canadian distributors/warranty shop, and they referred me to the Gun Nutz article I linked and offered no further assistance. (no free washers). I'm not one to beg for service so I'll leave it there and get the parts myself.