General Information
All Ruger Mark II Standard and Target Models are .22 caliber rimfire, 10-shot, magazine-fed, autoloading recoil ('blowback') operated pistols.
The Ruger Government Target Model has a longer, heavyweight barrel and is laser targeted at the factory, just like pistols delivered to the U.S. Government for target shooting and training.
The Ruger Competition Model has a slab-sided, heavyweight barrel with target grips and a scope base supplied with optical sight mounting rings.
The Ruger 22/45 has its grip frame assembly made of a molded synthetic polymer and a magazine latch button on the left side of the frame.
All Ruger Mark II pistols have the same basic operating mechanigm and include the following features with which the gun user should be thoroughly familiar:
The following tabel conatins variants of the MKII pistol.
Note, the prices shown are for REFERENCE only.
| Number |
Model |
Finish |
Barrel Length |
Overall Length |
Approx. Wt. |
Price |
| MK-4 |
Standard |
Blued |
4 3/4" |
8 5/16" |
35 oz |
$252.00 |
| KMK-4 |
Standard |
Stainless |
4 3/4" |
8 5/16" |
35 oz |
$330.25 |
| KP-4* |
Standard |
Stainless |
4 3/4" |
8 13/16 |
28 oz |
$280.00 |
| MK-6 |
Standard |
Blued |
6" |
10 5/16 |
37 oz |
$252.00 |
| KMK-6 |
Standard |
Stainless |
6" |
10 5/16 |
37 oz |
$330.25 |
| MK-678 |
Target |
Blued |
6 7/8" |
11 1/8" |
42 oz |
$310.50 |
| KMK-678 |
Target |
Stainless |
6 7/8" |
11 1/8" |
42 oz |
$389.00 |
| MK-4B |
Bull |
Blued |
4" |
8 1/4" |
38 oz |
$336.50 |
| P-4* |
Bull |
Blued |
4" |
8" |
31 oz |
$237.50 |
| P-512* |
Bull |
Blued |
5 1/2" |
9 3/4" |
35 oz |
$237.50 |
| KP-512* |
Bull |
Stainless |
5 1/2" |
9 3/4" |
35 oz |
$330.00 |
| MK-512 |
Bull |
Blued |
5 1/2" |
9 3/4" |
42 oz |
$310.50 |
| KMK-512 |
Bull |
Stainless |
5 1/2" |
9 3/4" |
42 oz |
$389.00 |
| MK-10 |
Bull |
Blued |
10" |
14 5/16 |
51 oz |
$294.50 |
| KMK-10 |
Bull |
Stainless |
10" |
14 5/16 |
51 oz |
$373.00 |
| MK-678G |
Bull |
Blued |
6 7/8" |
11 1/8" |
46 oz |
$356.50 |
| KMK-678G |
Bull |
Stainless |
6 7/8" |
11 1/8" |
46 oz |
$427.25 |
| KMK-678GC |
Bull |
Stainless |
6 7/8" |
11 1/8" |
45 oz |
$441.00 |
Safety
The safety locks the sear when the safety is "on". Because the safety cannot be moved to its "on" (S) position unless the hammer is cocked, the safety therefore serves as a cocking indicator. The bolt can be manually retracted and released when the safety is "on" (S). This feature allows the pistol to be loaded or unloaded when the safety is "on" (S). As shown below right, the safety should be "on" (the "S" fully showing) at all times except when the gun user is deliberately positioned to fire at a selected target.
Bolt Stop
When the last shot has been fired and the magazine is empty, the bolt stop automatically holds the bolt open. When there is an empty magazine in the pistol and the bolt is retracted manually, the bolt stop will automatically hold the bolt open. If a loaded magazine is inserted in the pistol when the bolt is closed and the bolt is then retracted fully, the bdt stop will not automatically hold open the bolt. The user can actuate the blfit stop mechanism to bold the bolt open at any time by retracting the bolt and pushing up the bolt stop.
The bolt stop can be released by drawing back slightly on the bolt and depressing the bolt stop thumbpiece. When the bolt is released. it will moveforward under pressure from the recoil spring.
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