The M22 comes with an optics rail which is the older type referred to as 3/8″ (or 11mm).
In an earlier review on the M22, it was mentioned that an optional picatinny rail might be available from Armscor.
“The M22 comes standard with an accessory rail bolted atop its receiver to accept various scopes and optics. Picatinny rails can also be had as an option, instead of the more basic rails found in initial production guns. We are told that the Picatinny rail format may be made standard in future guns, because of its popularity and compatibility with most of today’s optical devices.”
I called the Armscor factory and was told by a woman in their marketing or sales department that there was no picatinny rail available from them as an option. My guess is that it will be low priority for them since the M22 is bogged down in a trademark dispute, and can’t be sold in the US, which is the biggest market.
There are several aftermarket rails available for the Ruger 10/22, but the problem is that ordering online from abroad is a difficult proposition as it is likely that the item will be held by customs if they recognize it as a gun accessory. Customs will ask you to get an import permit from the PNP before releasing the item.
Luckily for me, I was able to find a UTG brand rail designed for the Ruger on OLX, from a vendor in Butuan. I deposited P1,000 + P185 (shipping) in the vendor’s account and received the item a day later.
It looked like it would fit, but the screws supplied with the UTG seemed to have a different thread, and I had read reviews on Amazon that people had messed up their Rugers because the wrong type of screw was supplied.
Having sorted out which screws to use, I carefully put the UTG screws back in their package and proceeded with the rail installation.
I used low strength threadlocker, equivalent to Loctite Blue. Just a small drop on the body of the thread, not the end. Insert the screws with the threadlock. I started with the two end screws inserted halfway before inserting the last two screws. Tighten them down in the same order, but do not overtighten. I then turned the gun upside down (to avoid any stray thread lock dripping into the action) and left it to dry for an hour.
Interestingly enough, the UTG rail lets me see the stock iron sights through the center channel of the rail, something some Ruger 10/22 users cannot do with their iron sights (according to the Amazon reviews).
So now I have to decide on what optics to put.