[Lightsped]

What year did Ruger switch from the Mk I to the Mk II? What are the differences with the Mk I and Mk II?

[SDC]

Can't help you with the date right now (don't have my books with me), but the difference between the MkI and MkII is that the MkI doesn't have a bolt hold-open/slide stop. HTH

[Hkmp5sd]

1982.

[Kharn]

Doesnt the MkI mag also have the little follower-button on the opposide side from the MkII mags (the factory mags let you swap the button over to the other side, IIRC)?

Kharn

[mgjohn]

MK1 has a 9 round mag and the MK2 has a 10 round mag.

[zahc]

The mark II also has the milled reciver back by the bolt making it easier to grab.

[md2lgyk]

The grip screws are also spaced differently on the two guns.

[Jim K]

Model number problem here.

The Ruger standard model made before 1982 (I assume hkmp5sd is correct) was not the Mark I. It was just the Standard Model. The Mark I was the target version with Micro sights, available in a 5" bull barrel, a 7" heavy barrel, and (IIRC) a 10" barrel.

When Ruger made the change (as described above) all the models were designated as Mark II series.

Jim

[Gordon]

I like MK1's . incidentally the barrel was 6 7/8" and heavy tapered. I have one done up by Clark in 79 and it SHOOTS. Also a 1955 std 6" that is deadly accurate to 50 yds! And a Real Old red eagle 4".:D

[Kruzr]

Hkmp5sd is correct. The Mark 2 came out in 1982. The grip frames were changed on the Mark 1 in 1971 to accomodate the follower button for the 9 round mags on the left side. Prior to that the slot in the frame was on the right side.