INSTRUCTION MANUAL FOR MAGNUM RESEARCH'S MLR-1722 RIFLE
READ THE INSTRUCTIONS AND WARNINGS IN THIS MANUAL CAREFULLY BEFORE USING THIS FIREARM
THIS INSTRUCTION BOOK SHOULD ALWAYS ACCOMPANY THIS FIREARM WHEN ON LOAN OR WITH CHANGE OF OWNERSHIP
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WARNING
SAFE STORAGE OF FIREARMS
CALIFORNIA WARNING
Children are attracted to and can operate firearms
that can cause severe injuries or death. Prevent
child access by always keeping guns locked away
and unloaded when not in use. If you keep a
loaded firearm where a child obtains and improperly uses it, you may be fined or sent to prison.
The above statement, provided as required by California
statute 12088.3
RELEASE, ASSUMPTION OF RISK, WAIVER OF LIABILITY AND INDEMNITY AGREEMENT.
When purchasing any item distributed by Magnum Research, Inc. the buyer expressly warrants that he/she
is in compliance with all applicable federal, state and local laws and regulations regarding the purchase,
ownership and use of the item. The purchaser expressly agrees to indemnify and hold harmless Magnum
Research, Inc. for all claims resulting directly or indirectly from the purchase, ownership or use of the item
in violation of applicable federal, state and local laws and regulations.
It is your responsibility to safely store this
(and all) firearms.
Many states have specific statutes requiring owners
of firearms to affirmatively limit access to firearms by
children or other unauthorized persons.
Check with your dealer or local law enforcement
authority for specific requirements of your
state/community.
WARNING
FIREARMS SAFETY
IS YOUR RESPONSIBILITY
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This instruction manual is designed to
assist you in learning how to use and
care for your Magnum Research model
MLR-1722 rifle correctly.
Only when you are certain that you fully understand all aspects of this manual and can properly
carry out all of its instructions should you practice
with live ammunition. If you have any doubts about
your ability to handle or use any particular type of
gun safety you should seek out supervised instruction. Such instruction is often available from gun
dealers, gun clubs or police departments. The NRA
(National Rifle Association) can also assist you
NRA
11250 Waples Mill Rd.
Fairfax, VA 22030-7400
SAFETY MUST BE THE FIRST AND
CONSTANT CONSIDERATION OF EVERY
PERSON WHO HANDLES FIREARMS
AND AMMUNITION
Table of Contents
Page
General Information . . . . . . . . . . . . . . . . . . . . . . .2
Operation of Safety . . . . . . . . . . . . . . . . . . . . . . .3
The Bolt Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Safety Note on Triggers . . . . . . . . . . . . . . . . . . . .4
Ammunition . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Loading and Firing . . . . . . . . . . . . . . . . . . . . . . . .6
To Unload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Malfunctions/Jams . . . . . . . . . . . . . . . . . . . . . . . .8
To Disassemble . . . . . . . . . . . . . . . . . . . . . . . . . . .9
To Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . .10
Care and Cleaning . . . . . . . . . . . . . . . . . . . . . . .11
Mounting Scopes . . . . . . . . . . . . . . . . . . . . . . . .11
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GENERAL INFORMATION
The MLR-1722 rifle is an autoloading rifle chambered for either 22 Long Rifle or 17 Mach-2, and so
marked on the barrel. It is recoil operated and uses
a standard 10 shot Ruger rotary magazine. Pulling
back the bolt handle cocks the internal hammer
and compresses a coil spring. When the bolt is
released, it moves forward by itself and forces a cartridge from the magazine and directs the cartridge
into the chamber of the barrel. The bolt is held
against the chambered cartridge by the force of the
recoil spring.
When the trigger is pulled, the hammer is released
and strikes the firing pin. The firing pin in return
strikes the rim of the cartridge causing an indent on
the case. This indent causes the internal priming
mixture to ignite and a large amount of expanding
gas is instantly generated which acts on the interior
of the cartridge case in all directions.
Because the bullet offers the least path of resistance
it is forced out of the case and exits the muzzle of
the barrel. The bolt then moves rearward by itself
extracting and ejecting the fired case, at the same
time it re-cocks the hammer, compresses the recoil
spring as mentioned earlier and feeds a new
cartridge into the chamber upon closing. Once the
trigger is released the rifle is ready to fire again.
Each time the rifle’s trigger is pulled and released
the same cycle is repeated until there is no more
ammunition left in the magazine or chamber.
WARNING: THE RIFLE WILL FIRE IF THERE IS
A CARTRIDGE IN THE CHAMBER OF THE BARREL EVEN IF THERE IS NOT A MAGAZINE IN
THE RIFLE! REMOVING THE MAGAZINE DOES
NOT UNLOAD THE RIFLE. ALWAYS INSPECT
THE CHAMBER AND MAGAZINE EACH TIME
THE RIFLE IS HANDLED TO BE CERTAIN
THERE ARE NO CARTRIDGES IN EITHER.
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OPERATION SAFETY
The MLR-1722 has a cross-button safety that is
located in the front of the trigger guard. It can only
be operated when the hammer is cocked.
The safety is “ON” when it protrudes from the right
or bolt handle side of the rifle’s trigger guard assembly. In this position the safety blocks the sear of the
rifle and the rifle cannot be fired from a normal pull
on the trigger.
NOTE; THE SAFETY SHOULD ALWAYS BE IN
THE “ON” POSITION WHEN THE RIFLE IS NOT
BEING FIRED.
The safety is “off” when it protrudes from the left
side of the trigger guard assembly. When the safety
is off a red band on the safety itself will be visible.
DO NOT RELY ON THE APPEARANCE OF THE RED
BAND TO INDICATE THAT THE SAFETY IS OFF. If the
rifle is dirty or if the available lighting is poor the red
band may not be visible. IF THE SAFETY IS “OFF”
AND THE TRIGGER IS PULLED THE RIFLE WILL FIRE.
The safety itself is held in position by a plunger that
is pushed upwards by a coil spring. When the safety is moved to either the “on” or “off” position a
clear “click “ should be heard. Frequently check the
position of the safety to always be certain it has not
been inadvertently been moved. If the safety moves
to easily or does not make an audible “click “ when
being used STOP using the rifle immediately and
return prepaid to:
Magnum Research
12602 - 33rdAvenue SW,
Pillager, MN 56473
WARNING
The only “safe “ rifle is one that the bolt is open,
chamber is empty and magazine is removed from
the gun. Never allow the rifle to be used in a
careless manner or to be pointed in an unsafe
direction.
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BOLT LOCK
The bolt lock lever is located in the forward section
of the trigger guard. It is manually operated and
designed to hold the bolt in the rearward position
when it is manually operated. When the bolt is
locked open, the rifle can be cleaned and inspected. It is inoperative in this position.
TO LOCK THE BOLT OPEN: Pull the bolt handle to
it’s extreme rearward position and while holding it
there press in on the LOWER section of the bolt lock
lever. Let go of the bolt handle and the bolt will
move forward a fraction of an inch, and then will
engage the lock and be in it’s locked open position.
TO RELEASE THE BOLT: Pull the bolt handle to it’s
extreme rearward position and then press on the
UPPER part of the Bolt Lock Lever and it will disengage allowing the bolt to move forward under the
power of the compressed recoil spring.
NOTE: The bolt lock must be intentionally disengaged
by the manual operation described above. This is by
design and will prevent an accidental release of the
bolt from its open position.
WARNING: MLR-1722 TRIGGER
The model MLR-1722 has a factory “pre-set” trigger.
It has minimum trigger pull weight and minimum
safe sear engagement. Do not alter or change
these settings. An unsafe condition can easily be
created rendering the rifle unsafe
trigger components may cause the rifle to fire
unexpectedly and will void your warranty.
Additionally you should have the safety on at all
times except when actually firing the rifle. Keep
your finger of off the trigger except when actually
firing the rifle.
Altering the
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AMMUNITION
The MLR-1722 is chambered for either 22 Long Rifle or
17 Mach-2 ammunition. The MLR-1722 can easily be
converted to either caliber and special care must be
taken when performing this operation. SEE DETAILS
OUTLINED BELOW:
The caliber of your MLR-1722 is marked on the barrel’s
left side.
22 Long Rifle: Use only 22 Long Rifle ammunition
manufactured to SAAMI specifications. This rifle will NOT
FUNCTION with short, long or subsonic cartridges.
They may “jam” the mechanism or discharge before
they are fully chambered. Use 22 LONG rifle standard
velocity or high velocity ammunition.
TIPS: The MLR-1722 has a very high potential
for accuracy when used with the correct 22 Long Rifle
ammunition. Typically 22 Long Rifle standard velocity
ammunition will shoot more accurately than high
velocity ammunition. Also many of the “Match” designated 22 Long Rifle ammunitions will outperform even
the Standard Velocity ammunition. Typically the cost of
the ammunition is directly traceable to how well it will
shoot. More expensive ammunition will shoot better.
NOTE: DO NOT USE STINGER AMMUNITION. STINGERS
HAVE A LONGER CASE AND MAY STICK IN THE TIGHT
CHAMBERS FOUND IN THE MLR-1722 BARRELS. THEY
MAY ALSO CAUSE A RUPTURED CASE AND THE
RELEASE OF HOT, EXPANDING GASSES WHEN FIRED.
17 Mach-2: Several ammunition companies produce
17 Mach-2 ammunition. NOT TO BE CONFUSED WITH
THE LARGER 17 HMR.
The 17 Mach-2 is a high performance rimfire round that
will achieve amazing velocity and accuracy. The
MLR-1722 rifles that are chambered for the 17 Mach-2
cartridges have a specially designed bolt handle. It is
large and barrel shaped. This bolt handle is the key to
successful and safe operation of the 17 Mach-2
cartridge. It times the action and retards the operation
of the bolt appropriately when the rifle is fired.
NEVER FIRE 17 MACH-2 AMMUNITION WITHOUT
THE SOLID BARREL SHAPED BOLT HANDLE
INSTALLED IN THE RIFLE.
This Mach-2 bolt handle should NOT be confused
with the .22LR bolt handle that is similar in shape
but has 1/2 hollow hole in center.
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Loading and firing the rifle with magazine:
1. Always keep the muzzle (front end on barrel)
pointed in a safe direction.
2. Pull the bolt handle rearward and engage the bolt
lock lever so that the bolt remains in the open
position. Inspect to make sure rifle is not loaded
and there are no obstructions or foreign matter in
the action or barrel. Place the safety in the “ON”
position.
3. Remove the magazine by depressing the magazine
latch found directly in front of the trigger guard
with your thumb and by simultaneously grasping
the front of the magazine with your index finger.
Lightly pull the magazine straight out of the rifle.
4. Load the magazine by sliding up to ten cartridges,
of the same caliber as marked on the barrel of
your rifle, by placing them “rim first “ into the
magazine’s steel throat – opening and with slight
pressure downward slide the cartridges back and
under the steel lips of the magazine. You may
repeat this process up to ten times. The magazine
holds ten shots when fully loaded.
5. Insert the magazine into the rifle with the bullets
facing forward. NOTE: The magazine cannot be
installed the wrong way.
6. Load a cartridge into the chamber by pulling the
bolt handle completely rearward, release the bolt
lock and release the bolt handle. DO NOT TOUCH
THE TRIGGER. Do not “ride” the bolt handle; rather
let it close under it’s own power. Do not force the
bolt handle to close the bolt. If the cartridge fails to
chamber eject it and remove the magazine. Clean
the bolt and chamber if dirty and inspect your
cartridges to insure that they are not damaged.
7. The rifle is now fully loaded and ready to fire. Keep
the safety in the “on” position. When the safety is
moved to the “off” position the rifle will fire with
each pull of the trigger until all of the cartridges in
the magazine are spent.
8. NOTE: IMMEDIATELY FOLLOWING A SHOT PLACE THE
SAFETY IN THE “ON” POSITION IF A SUBSEQUENT
SHOT IS NOT TO BE FIRED AT ONCE. PLACE THE
SAFETY IN THE “ON” POSITION WHILE THE RIFLE IS
POINTED DOWN RANGE IN A SAFE DIRECTION.
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9. The bolt will not remain open after the last shot is
fired. When firing is completed or the magazine is
empty remove the magazine and manually pull back
the bolt handle and visually inspect the rifle to insure
the chamber is empty. IF THE BOLT IS CLOSED ALL
WAYS ASSUME THE RIFLE IS LOADED. DO NOT RELY
ON YOUR MEMORY TO KNOW IF A FIREARM IS
LOADED. ALWAYS VISUALLY INSPECT THE MAGAZINE
AND CHAMBER.
Unloading the rifle and magazine:
NOTE: THIS SEQUENCE MUST BE FOLLOWED
EXACTLY AS WRITTEN. FAILURE TO DO SO CAN
RESULT IN THE RIFLE’S CHAMBER BECOMING
UNINTENTIONALLY LOADED WITH A CARTRIDGE.
1. Keep the muzzle pointed in a safe direction at all times
and keep fingers outside of the trigger guard and
away from the trigger. If the rifle is cocked, MOVE THE
SAFETY TO THE “ON” POSITION.
2. Remove the magazine but remember that even with
the magazine removed a cartridge remaining in the
chamber may still be fired.
4. Always visually inspect the chamber to insure there is
no cartridge in the chamber. If the rifle is dirty or the
ammunition is dirty a cartridge may remain in the
chamber after the bolt is manually pulled back. In this
situation with NO magazine in the rifle point the rifle
safely downrange and place the safety in the “off”
position. Fire the rifle by pulling the trigger. Repeat
step three (3). If a cartridge remains in the chamber
leave the bolt locked open, place the safety in the
“on” position and install the safety lock cable through
the ejector port opening and down through the
magazine hole and securely lock. This will prevent
the bolt from closing and allow for safe transport
of the rifle. Call our service department for further
instructions.
5. The only “safe” rifle is one that has the bolt open and
the chamber and magazine are empty.
6. Cartridges can be removed from the magazine by
pushing them lightly downward and forward with the
thumb, forefinger or the rubber eraser end of a pencil
held against the rim of the cartridge.
3. Pull the bolt handle back and lock it open there. This
SHOULD eject any cartridge that is in the chamber.
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TO CLEAR A MALFUNCTION
OR "JAM"
1. Any semi-automatic rifle may occasionally malfunction.
If it does:
2. BE SURE THE MUZZEL IS POINTED IN A SAFE
DIRECTION AND THE SAFETY IS “ON”.
3. If possible first remove the magazine. It may be
necessary to remove a jammed cartridge, which has
only partially been slid from the magazine.
If so, use extreme care. Lock the bolt open with
the bolt stop before attempting to clear the jam.
Pulling the bolt back may bring the jammed
cartridge along with it. Keep your face away from the
ejector port during this process. When attempting to
clear a jam only use wooden tools so that a cartridge
will not be ignited if you strike the primed rim of the
cartridge. A 3/16” wood dowel with a pointed end is
useful.
4. Visually check to make sure all cartridges have been
removed from the rifle. Safely dispose of any cartridges
involved in a malfunction incident. Do not use
damaged ammunition in any firearm.
TO MINIMIZE
MALFUNCTIONS OR "JAMS"
1. Improper or damaged magazines, incorrect or old
ammunition or a dirty rifle causes most “jams”.
2. If it appears that the rifle and magazine are not at
fault and that the jam was caused by the ammunition
being used then try a different type or brand of
factory ammunition.
3. If changing to a different type of ammunition does
not eliminate malfunctioning, then the following steps
should be taken:
a. Make sure the rifle and magazine are unloaded
and that the safety is “on”. Remember the
magazine should be removed first when unloading a rifle, then check the chamber and be certain
it and the magazine are clear of cartridges.
b.Thoroughly clean the magazine and bolt assembly.
(See inspection and care section on page 11.
Remove accumulated grease by using a bristle
brush and cleaning solvent to clean the breech of
the barrel and face of the bolt. Clean the ramp of
the magazine.
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c. Remove any excess oil and solvent from all
cleaned parts and the inside of the barrel and try
the firearm again.
4. If the above procedures do not result in a smooth and
reliably functioning firearm, do no use this rifle. It may
be returned to our service department directly for
repair. See the last page of this manual for packaging
and shipping information.
TO DISASSEMBLE
Another precaution: Always form the habit of examining
fired cartridge cases. If they appear to be bulged or split
the rifle should be returned for gauging and inspection.
1. MAKE SURE THE RIFLE IS UNLOADED.
2. With the rifle pointed in a safe direction, remove the
magazine, open the bolt and visually make sure there
is not a cartridge in the chamber. Then allow the bolt
to close. The hammer should be cocked.
3. Loosen the takedown screw located directly in front of
the magazine on the bottom of the rifle. Do not
remove it.
There is not a stop here so position it so equal
amounts of the safety show on each side of the
trigger guard. Failure to do this will result in a
damaged stock.
5. Swing the barrel and receiver assembly upward and
away from the forearm of the stock. Be careful that
the two cross pins in the receiver do not fall out.
6. Remove the trigger guard assembly by pushing out
the two small cross pins. The trigger guard can be
cleaned without any further disassembly.
7. TO REMOVE THE BOLT:
a. Position the rifle upside down
b.Push out the larger bolt stop pin located at the
rear of the receiver.
c. Pull the bolt handle fully to the rear and lift up the
front of the bolt until it is disengaged from the
handle.
d.Remove the bolt handle assembly from the ejector
port opening.
e. Lift the bolt out of the receiver. If it does not easily
come out turn the rifle over and it will drop out.
4. Position the safety so it is in the “middle” position.
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REASSEMBLY
1. Reassembly of the bolt into the receiver:
a. Position the rear or cone end of the bolt
handle/guide rod into the mating recess near
the rear right side of the receiver. The recoil
spring must be flat against the side and “bottom”
of the receiver.
b.Maintain the guide rod in its proper position by
keeping pressure on the bolt handle with the left
forefinger and thumb. At the same time, use the
flat side of a screwdriver blade to compress the
recoil spring by pulling it back against that area of
the bolt handle nearest the spring. In accomplish
ing this spring compression it is necessary to main
tain the same pressure on the screwdriver with
the right hand as that being maintained on the
bolt handle with the left hand.
c. When the spring is fully compressed, maintain it
in that position with the left hand and with the
right hand lay the bolt (firing pin side down) on
the section that mates with it. Press down on the
front of the bolt until a “click” is heard and the
two parts have joined together. You may need to
let the handle slip forward a very little way to
accomplish this.
2. Reassembly of the rifle:
a. Install the bolt stop pin in the rear of the receiver.
(large pin)
b.Lay the trigger guard in place and install the two
smaller cross pins trough the receiver.
c. Place the barrel and receiver assembly into
the stock by following in reverse order steps 1
through 5 under disassembly.
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CARE AND CLEANING
Before cleaning, be sure rifle is unloaded
and the magazine and chamber contain no
cartridges
1. Disassemble the rifle as explained on pages 9/10.
2. Using a cleaning rod, run a solvent wetted patch
through the barrel from the breech end of the receiver.
NOTE: A convenient cleaning hole has been placed in
the rear of the MLR-1722 receiver for this purpose. Then
attach a solvent wetted brush of the correct caliber and
run it back and forth 20 times. Clean the bore and
chamber with dry patches and examine. A fouled bore
will decrease accuracy. In the case of 22 Long rifle
ammunition the grease they leave behind will cause
malfunctions.
3. Using powder solvent on a clean patch or brush
remove all powder residue from all components of the
mechanism. After cleaning, run several dry patches
through the bore. Then run a very lightly oiled patch
through the bore. Wipe all surfaces clean with a cloth
that has been very lightly oiled.
4. NOTE: use only a small amount of lubricating oil in
the mechanism. Excessive oil tends to accumulate burnt
powder and debris that may congeal in cold weather
and create malfunctions.
SCOPE MOUNT RAIL
The MLR-1722 rifle has a scope mount rail
machined integrally onto the one-piece receiver. It is
designed to use any “weaver” type ring assembly
and will accommodate any scope with an objective
(front) lens diameter of 50 MM or less with low
rings. It extends out over the front of the receiver to
allow for proper eye relief with longer target type
scopes. When installing rings on the MLR-1722’s
scope rail place the nut or head of the attaching
bolt of the ring on the left (opposite the ejector
port) side of the receiver so that it will not interfere
with ejecting the spent or fired cases.
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SHIPPING FIREARMS
FOR REPAIR
Magnum Research MLR-1722 rifles may be returned
to the factory, prepaid for repair or cleaning. They
should be sent to:
Magnum Research, Inc.
12602-33rd Avenue SW,
Pillager, MN 56473
218-746-4597
We will not accept collect shipments.
You may ship your rifle directly to us for service but
some localities may not allow us to return it directly
to you. Check with your local authorities before
sending a firearm to us. You may need to send it
through a federally licensed firearms dealer and it
will then be returned to that dealer.
BEFORE SHIPPING ANY FIREARM BE SURE
THAT IS UNLOADED, BOTH MAGAZINE AND
CHAMBER.
Please remove any accessories such as scopes or
slings prior to packaging rifle for shipment. Package
the rifle securely in a stout box, include your name,
address, phone number, serial number of the rifle
and a detailed description of the trouble you have
experienced as well as the type of ammunition that
was used.
Any work performed on your rifle that is not related
to our workmanship or materials will be billed to
you on an hourly rate. A return shipping charge will
also be added when the rifle is returned.
PARTS
We will sell parts on a case-by-case basis. Please
contact our service department with your needs.
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Magnum Research, Inc.
7110 University Avenue NE
Minneapolis, MN 55432
(763) 574-1868
Fax: (763) 574-0109
www.magnumresearch.com
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