KWA M11A1 NS2 User manual

®
OPERATOR’S MANUAL
KWA Performance Industries, Inc.
Copyright © July, 2009 KWA Performance Industries, Inc. All Rights Reserved.
MMD09_M11A1 V02 R2012.09.06
M11A1 NS2

TABLE OF CONTENTS
Use of this Manual...........................................................................................3
Safety Guidelines ........................................................................................ 3-4
Specications ..................................................................................................4
Package Contents ..........................................................................................4
Charging Gas ..................................................................................................5
Loading BBs ....................................................................................................6
Locking Bolt ....................................................................................................7
Loading Magazine ...........................................................................................7
Selector ...........................................................................................................8
Safety ..............................................................................................................8
Retractable Stock ............................................................................................9
Shooting ..........................................................................................................9
Open Bolt ......................................................................................................10
After Shooting................................................................................................10
Hop-Up System ............................................................................................11
Adjustment Point ..........................................................................................12
Disassembly ............................................................................................ 13-14
Assembly.......................................................................................................15
Troubleshooting ............................................................................................16
General Maintenance ....................................................................................17
Operating Under Unusual Conditions............................................................18
Diagrams and Parts Lists ....................................................................... 19-22
M11A1 NS2
122
145
134
151
141
149
143
133
137 147
146
142
139
135
148
136
140
140
150
MAGAZINE DIAGRAM AND PARTS LIST
Parts # Description
M11A1-MG133 Hi Cap Magazine Body
M11A1-MG134 Magazine Lip
M11A1-MG135 Magazine Base
M11A1-MG136 Magazine Base Plate Lock
M11A1-MG137 Magazine Follower
M11A1-MG139 Hi Cap Magazine Gas Expansion Tube
M11A1-MG140 Magazine Base Pins
M11A1-MG141 Magazine Lip Pin
M11A1-MG142 Magazine Base Seal
M11A1-MG143 Magazine Base Plate
M11A1-MG145 Hi Cap Magazine Follower Spring
M11A1-MG146 Magazine Follower Lock
M11A1-MG147 Magazine Follower Lock Leaf Spring
M11A1-MG148 Magazine Charging Valve
M11A1-MG149 Magazine Release Valve
M11A1-MG150 Magazine Lip Screw
M11A1-MG151 Magazine Nozzle Seal
Parts # Description

21
M11A1-93 Breech Buffer (Small)
M11A1-94 Breech Buffer (Large)
M11A1-95 Breech Base Screw (Small)
M11A1-96 Breech Base Screw (Small)
M11A1-97 Breech Base Screw (Large)
M11A1-98 Front Sight Base Screw
M11A1-99 Main Seal Base Screw
M11A1-100 Grip Screw
M11A1-102 Impact Block Housing
Retainer
M11A1-103 Hop Up Cylinder Retaining
Ring E-Clip
M11A1-104 Recoil Spring Guide E-Clip
M11A1-105 Folding Stock Pin E-Clip
M11A1-107 Safety Pin
M11A1-111 Hop Up Ball Bearing
M11A1-112 Safety Switch Ball Bearing
M11A1-121 BB Feed Ramp
M11A1-122 BB Feed Ramp Pin
M11A1-123 Main Seal Base
M11A1-125 Alum Jet Nozzle
M11A1-126 Jet Nozzle Spring
M11A1-128 Main Seal Cap
M11A1-129 Jet Nozzle Pin
M11A1-130 Main Seal
M11A1-132 Main Seal Cap Screw
M11A1-152 Inner Barrel Clip
M11A1-153 Inner Barrel Spring Washer
M11A1-154 Inner Barrel Spring
Parts # Description
M11A1-1 Lower Frame
M11A1-2 Upper Frame
M11A1-3 Bolt
M11A1-4 Cylinder
M11A1-5 Front Sight
M11A1-6 Front Sight Base
M11A1-8 Grip
M11A1-9 Hop Up Cylinder Retaining
Ring
M11A1-10 Inner Frame Base
M11A1-11 Wire Stock
M11A1-12 Trigger
M11A1-13 Inner Barrel Base
M11A1-14 Bolt Stop
M11A1-15 Sear
M11A1-16 Impact Block
M11A1-17 Sear Disconnector
M11A1-18 Safety Base
M11A1-19 Breech Base
M11A1-20 Bolt Handle
M11A1-21 Outer Barrel
M11A1-22 Inner Barrel Clip
M11A1-24 Impact Block Reset Button
M11A1-28 Safety
M11A1-29 Magazine Release Lever
M11A1-30 Selector Lever
M11A1-31 Stock Release Button
M11A1-32 Hop Up Cylinder
M11A1-38 Hop Up Bucking
M11A1-40 Inner Barrel
M11A1-44 Recoil Spring Guide
Follower
M11A1-46 Impact Block Pin
M11A1-48 Bolt Handle Plunger
M11A1-49 Recoil Spring Guide Rod
M11A1-50 Take Down Pin
M11A1-51 Take Down Pin Lock
M11A1-52 Trigger Pin
M11A1-53 Stock Pin
M11A1-57 Inner Barrel Clip Pin
M11A1-58 Outer Barrel Retaining Pin
M11A1-60 Sear Pin
M11A1-63 Magazine Release Lever Pin
M11A1-64 Cylinder Return Spring
Retaining Pin
M11A1-65 Impact Block Housing (Left)
M11A1-66 Impact Block Housing
(Right)
M11A1-67 Inner Slide Housing
M11A1-69 Folding Stock
M11A1-70 Swivel
M11A1-71 Main Seal Base Screw
Washer
M11A1-73 Trigger Spring
M11A1-74 Impact Block Housing
Spring
M11A1-75 Impact Block Spring
M11A1-
76-1 Recoil Spring
M11A1-77 Sear Spring
M11A1-80 Bolt Handle Plunger Spring
M11A1-81 Bolt Stop Spring
M11A1-82 Sear Disconnector Spring
M11A1-83 Cylinder Return Springs
M11A1-87 Stock Release Button
Springs
M11A1-88 Magazine Release Lever
Spring
M11A1-89 Safety Spring
M11A1-90 Trigger Pin Retaining Spring
M11A1-92 Impact Block Reset Button
Spring
Parts # Description Parts # Description
2
USE OF THIS MANUAL
Before operating the Airsoft gun, read this manual in its entirety. Important safety topics
and tips are discussed throughout all of the chapters. It’s important that the operator know
the principles of gun handling safety and operation prior to ring the Airsoft gun.
SAFETY GUIDELINES
WARNING! Failure to follow safety guidelines may result
in serious injury.
Safety Distance
The effective shooting range is approximately 75 feet. BBs red from this Airsoft gun may
travel further than intended. Make certain that you have an adequate backstop.
Eye Protection
Eye protection should be worn at all times when both shooting and maintaining your Airsoft
gun. Protect your eyes from BBs under pressure while performing maintenance on your
Airsoft gun.
Assume Every Gun is Always Loaded
Until you are certain the chamber is empty, treat every gun as if it were loaded. Do not
assume the chamber is empty based on your memory or someone else’s words. Always
remove the magazine and visually check to conrm the chamber is empty.
Beware of Barrel Obstructions
Ensure the Airsoft gun barrel is free of obstructions before you re the gun. Even the
smallest obstruction such as lubrication or a stuck cleaning patch can cause a misre or
malfunction.
Muzzle Control
Always keep the muzzle of the gun pointed in a safe direction. Never point the muzzle at a
person or object that you do not intend to shoot.
Keep Your Safety On
Keep the gun’s safety on until your sights are aligned on your target and you are ready to
re.
Keep Your Finger Off The Trigger
Keep your nger off the trigger and out of the trigger guard until your sights are aligned on
your target and you are ready to re.
WARNING! Airsoft BBs can be a choking hazard. Keep
them away from children.
!
!
PARTS LIST
M11A1 NS2

3
SAFETY GUIDELINES
Identify Your Target and Backstop
Before you pull the trigger, make certain of your target and what is beyond it. The Airsoft
gun should never be red at surfaces such as rocks, glass, water, or other hard surfaces
where BBs are likely to ricochet in unpredictable directions.
WARNING! Adult supervision is required for any person
under the age of 18.
Failure To Fire
If the Airsoft gun fails to re, misres, or malfunctions, do not look into the gun barrel. BBs
can become lodged into the chamber, and serious eye injury may occur.
Maintain Your Gun Properly
Performing proper maintenance, as outlined in this manual, ensures that your Airsoft
gun will be safe to shoot and will perform to its designed specications for many years.
Alterations, modications or adjustments may damage your Airsoft gun, make it unsafe to
shoot, and will void all warranty claims.
Store Your Gun Safely
Always store the Airsoft gun in a safe place, and out of the reach of children. Always
transport the Airsoft gun in a carrying case. Never display the Airsoft gun in a public place.
Keep the safety engaged, and remove the magazine before storing the Airsoft gun. Note:
it is your responsibility to take every reasonable precaution to ensure the safe storage and
transportation of your Airsoft gun.
Orange Tip
The orange tip on Airsoft guns helps Law Enforcement distinguish between the replica
guns from their real rearm counterparts. Altering the coloration or markings required by
state or Federal law so as to make the product look more like a rearm is dangerous and
may be a crime. Operator assumes all risks and responsibility when doing so.
Hazards of Being Mistaken for a Real Firearm
Airsoft guns have been mistaken by Police and Law Enforcement as real rearms. A
confrontation with law enforcement while carrying an Airsoft gun can result in serious injury
or even death. It is strongly advised to operate the Airsoft gun at a safe and legal location.
In the event that you are approached by Law Enforcement personnel, you must comply with
their instructions immediately to avoid an incident.
Alcohol, Medications, and Drugs
Do not handle or operate your Airsoft gun while under the inuence of alcohol, medication
or drugs.
Your Responsibility
Your Airsoft gun is well-engineered and manufactured to the highest standards. It was
carefully inspected before it was packaged and shipped from our factory. Its safe use
depends on you alone. You are the ultimate safety device. Like many other devices, your
Airsoft gun is safe unless handled in an irresponsible or uneducated manner.
20
!
50
21
70
80
48
107
3
1
51
30
58
57
63
29
88
8
100
11
53
105
69
77
15
60
12
52
73
107
28
87
87
31
89
112
9081
14
17
82
122
104
44
121
154
153
76
40
103
9
32 111
38
49
104
97
95
96
98
6
5
20
2
67
83
83
152
4
129
126
125
132
128
130
123
18
13
10
64
94
93 71
99
46
65 16
75
74
66
102
24
92
19
93
M11A1 NS2

19 4
SPECIFICATIONS
• Overall Length (Retracted) = 25.4 cm [10”]
• Overall Length (Extended) = 45.5 cm [17.92”]
• Overall Height = 25 cm [9.84”]
• Inner Barrel Length = 115 mm
• Inner Barrel Diameter = 6.05 mm
• Weight = 1.32 [2.91 lbs]
• Caliber = 6 mm
• Magazine Capacity = 48 rounds
• Rate of Fire = 20+ RPS
• Velocity = 103-110 MPS [340-360 FPS]
• Energy Output with 0.20g BB = 1.07 Joules
• Gas System = NS2
• Propellant = Green Gas
Special Features:
• Heavy duty construction with polymer casing
• Front sling loop
• Threaded barrel
• Functional cocking handle with realistic bolt movement
• Retractable shoulder stock
• Semi and full auto selective re
• Adjustable hop-up
*Individual test results may vary depending on brand of BBs, ambient temperature,
and chronograph used.
PACKAGE CONTENTS
1 M11A1 NS2 Airsoft gun
1 Bottle of Silicon Oil
1 Hi-Cap Magazine
1 Sample Bag of Airsoft BBs
1 Hop-Up Adjustment Tool
1 Operator’s Manual
50
21
70
80
48
107
3
1
51
30
58
57
63
29
88
8
100
11
53
105
69
77
15
60
12
52
73
107
28
87
87
31
89
112
9081
14
17
82
122
104
44
121
154
153
76
40
103
9
32 111
38
49
104
97
95
96
98
6
5
20
2
67
83
83
152
4
129
126
125
132
128
130
123
18
13
10
64
94
93 71
99
46
65 16
75
74
66
102
24
92
19
93
PARTS DIAGRAM
M11A1 NS2

5
CHARGING GAS
1. Release the magazine by pressing the magazine catch.
2. Push the gas canister nozzle into the charging valve. (Make sure both the canister
and magazine are inverted and in the vertical position when charging.)
3. Charge the magazine until gas overows from the charging valve.
WARNING: Avoid dropping the magazine. Sudden impact with a
hard surface may cause damage to the magazine.
Note: It is normal to have minor leaking from the charging valve during charging due to
high pressure built up inside the magazine. It is recommended to keep the gas release valve
slightly oiled. Room temperature is the ideal temperature for shooting. You may experience
a delayed action if the surrounding temperature drops below 68º F.
Note: Do not expose the magazine to direct sunlight or incinerate the magazine, as this
may cause the magazine to burst. It is strongly recommended to empty the gas from the
magazine after shooting. Be certain that the gas does not make contact with eyes or skin
while being released, as any contact will cause cold burns.
18
OPERATING UNDER UNUSUAL CONDITIONS
Unusual conditions are dened as any condition requiring special maintenance.
Perform maintenance outlined for the climate similar to your operational area
Extreme Cold:
Operating an Airsoft gas gun in extremely cold temperatures is not recommended. Cold
temperatures will cause the Hop-up Bucking to harden, reducing its effectiveness. Gas
will not expand properly in cold temperatures, so both the cycling rate and power will be
dramatically reduced.
Extreme Heat:
Operating an Airsoft gas gun in extremely hot temperatures is also not recommended.
Leaving the gun in direct sunlight for long periods of time, or operating in extremely hot
areas will cause the gas to over-expand, damaging the internal workings of the gun. The
increase in internal pressure from the expanding gas can also damage the seals and cause
leaks in the magazine.
Dust or Sand:
Dust or sand can get into a gas gun and cause malfunctions and/or excessive wear. Keep
the gun covered whenever possible. Use lubricant sparingly, as lube naturally attracts dirt
and other particles. After use in a dusty area, always eld strip the gun (refer to Disassembly
Section) and clean any areas you can reach with a soft, lint-free cloth.
!
Charging
Valve
Magazine
Catch Nozzle
Magazine
M11A1 NS2
Green Gas safety tips:
• Check the canister for any cracks or leaks before using.
• Do not expose the canister to temperature over 104º F.
• Do not leave the canister directly over re.
• Do not heat the canister.
• Keep the canister away from direct sunlight.
• Do not leave the canister in any type of vehicle.
1
2
3

17
GENERAL MAINTENANCE FOR KWA GAS BLOW BACK
Green gas is a liquid propellant which tends to dry out the seals and o-rings. With lubricating
silicone oil, it will extend the life of the seals and o-rings and prevent gas
leaks.
Use only the recommended 100% silicone oil, available for purchase at the Airsoft dealer
where you purchased your KWA products. Any other type of lubricant may damage the
products.
Lightly lubricate the recoil spring, cylinder and moving parts with a few drops of oil.
Lubricating the seals and o-rings are essential. Unload BBs from the magazine. Make sure
the magazine is free of gas before lubricating the magazine’s charging valve and release
valve.
6
1
2
4
3
5
LOADING BBs
1. Pull the magazine follower down until it locks.
2. Insert BBs into the magazine lip.
3. BBs should stack staggered for maximum round capacity.
4. Make sure to have a 3mm clearance between BBs and the top lip of the
magazine.
5. Push the magazine follower lock to release.
WARNING: Do not release the magazine follower when the
magazine is empty. Doing so will damage the magazine and
magazine follower.
WARNING: Always use high quality 6mm BBs, weighing 0.2g or
heavier. For best result use 0.25g KWA Perfect BBs. Never use
recycled or low grade BBs to prevent damage to your gun.
!
!
Check for 3mm
clearance after
loading BBs.
3mm
Magazine Follower
M11A1 NS2
Push
down
to lock
Push to
release
Magazine Lip

7
1. Pull the bolt handle back to lock the bolt.
2. Place the magazine into the magazine
well.
3. Push the magazine up until it clicks into
a locked position.
4. Pull the magazine down to assure that it
has been locked in place.
Locking Bolt
To lock the bolt, pull the bolt handle back to the rear of the gun.
WARNING: To avoid accidental discharge due to inadvertent
trigger pull, keep the manual safety engaged during loading or
unloading.
WARNING: Always keep nger off the trigger until ready to re.
Make sure the muzzle is pointing in a safe direction.
WARNING: Before loading the magazine, the bolt must be in the
locked position to avoid damaging the cylinder.
LOADING MAGAZINE
16
SOLUTIONS
Add silicone to cylinder / main seal/ rails
Release hop-up or replace bucking
Replace magazine lip
Add silicone oil to valves / Replace valves
Replace base plate lock
Replace magazine base seal
Replace cylinder
POSSIBLE CAUSE
Dry internals
Hop-up adjustment too tight
Bended magazine lip
Dry O-ring
Broken base plate lock
Worn out base seal
Broken Cylinder tap
SYMPTOMS
Bolt jams / Will not complete cycle
Double feeds BBs into
chamber / BBs roll out of barrel
BBs will not release from magazine /
bent mag lip/ check BB condition
Leaking release valve & charging valve
Magazine base plate will not lock
Magazine base leaking air
Cylinder will not load BBs into chamber
!
!
!
SAFE FIRE
Safety
Button
Pull Back to Lock Bolt
Bolt
Handle
BASIC TROUBLESHOOTING GUIDE FOR SMG
M11A1 NS2

15
ASSEMBLY
1. Place the recoil spring onto the bolt assembly.
2. Lock the bolt assembly onto the upper frame.
3. Install the upper frame onto the lower frame and align the bolt knob hole. Make
sure the hook underneath the bolt hooks onto the impact block
4. Push the bolt knob into the bolt assembly and push the slide assembly to the
rear.
5. Align the retaining pin holes.
6. Insert the 2pc retaining pins.
7. Cycle the bolt to ensure proper assembly before shooting.
8
WARNING: Make sure safety is on at all times when not in a
shooting position.
SELECTOR
The selector is located on the left side of the frame. Select (S) to re semi-automatic
(single shot) and select (F) to re full automatic (continuous re).
SAFETY
The safety button is located in front of the trigger. Safety is engaged when you push
safety button to “SAFE”. Safety is disengaged when you push safety button to “FIRE”.
When the bolt is closed, bolt can be locked for storage by turning the bolt knob 90˚
counterclockwise.
S
S
2
3
4
6
1
!
SAFE FIRE
SF
Retaining Pin
Retaining Pin
Semi-Auto
ON OFF
Full-Auto
M11A1 NS2
Recoil
Spring
Assembly
Bolt Assembly
Upper Frame
Lower Frame
Bolt Knob

9
RETRACTABLE STOCK
1. Push the wire handles inward.
2. Swing the wire handles downwards until it locks.
3. Press and hold the stock button while pulling the stock
slightly outward. Release the stock button.
4. Pull the retractable stock until the stock locks into
position.
NOTE: To remove the retractable stock from the gun, press and hold the stock
button and pull the stock out completely.
SHOOTING
1. Choose shooting mode. Select “S”
for semi-auto or “F” for full-auto.
2. Disengage the safety.
3. Squeeze the trigger to re.
WARNING: It is recommended eye protection be wore at all times.
BBs may bounce off hard surfaces (ricochet). Always point gun
in a safe direction.
14
8. Turn the bolt knob 90˚ “clockwise” and pull the knob upward and out. The bolt
handle “cut-out” should be aligned parallel to the slide in order to remove the
bolt handle.
9. Remove the upper frame off of the lower frame.
10. After the upper frame is removed, push the bolt backward and then lift the bolt
upward. Make sure the hook underneath the bolt clears the impact block.
!
SAFE FIRE
SAFE FIRE
SAFE FIRE
1
2
3
4
SAFE FIRE
SAFE FIRE
89
10
Remove Upper Frame
Remove Bolt Assembly
Bolt Assembly
Remove
Knob
M11A1 NS2
Press on
Stock
Button
Push Wire
Handle Inward
Swing Downward
Pull Backward

13
DISASSEMBLY
It is not recommended to disassemble the gun
unless for general maintenance, or to clear
BBs jammed inside the barrel.
1. Remove the magazine by depressing
the magazine catch.
2. Remove the stock from the receiver
(see pg13).
3. Pull the bolt handle to lock the bolt.
4. Check and clear the chamber from
any BBs.
5. Using your nger tip, or small pen
like tool, press down on the retaining
pin 1, from within retaining pin 2, and
pull it out from opposite end.
6. Pull retaining pin 2 out from the
receiver. The pin is seated tightly in
the receiver, considerable effort may
be needed to pull it out.
7. Pull the upper frame upward and
forward until it stops on bolt handle.
(continue on next page)
10
OPEN BOLT
After the last shot has been red and ejected. The bolt will lock halfway and the ejection
port will remain opened.
NOTE: It is important to treat your gun as though it is loaded, even if the bolt remains open.
AFTER SHOOTING
Visually inspect the open bolt to check whether the magazine well and chamber are clear of
BBs. When both the magazine well and chamber are clear, ENGAGE SAFETY SWITCH.
NOTE: Keep the chamber piston and seals oiled lightly with 100% silicone oil after
shooting
SAFE FIRE
SAFE FIRE
3
65
2
7
SAFE FIRE
Retaining
Pin 1
Pull Bolt Backward
Pull Up and
Forward
Remove Stock
Retaining
Pin 2
CHECK
MAKE SURE
CHAMBER
IS CLEAR
M11A1 NS2

11
SAFE
FIRE
HOP–UP SYSTEM
The Hop-Up device is one of KWA’s standard features, giving Airsoft BBs greater stability,
further travel and increased accuracy. Airsoft BBs are light-weight and can be affected by
wind when red. With the Hop-Up system, the trajectory of the Airsoft BBs can be adjusted
according to the shooting environment or surroundings.
HOP-UP ADJUSTMENT
To adjust the Hop-Up, make sure the magazine is loaded and that you have at least 65 feet
of clearance for a test re before making any adjustments.
1. Test re the gun for 10 to 20 rounds and observe the BB’s traveling pattern.
2. Remove the magazine.
3. Open the slide and place adjusting tool into the slotted chamber ring. Turn the
adjusting ring a 1/4-inch at a time.
4. If the BBs are dropping too quickly, move the adjusting ring to the left or
counter-clockwise to give the BB more hop. If the BBs are dropping too slowly,
move the adjusting ring to the right or clock-wise.
5. Test re and adjust as needed.
12
ADJUSTMENT POINT
SLIGHTLY
PROPERLY
OVERLY
HOP UP
EFFECTIVENESS ADJUSTMENTS
BB TRAJECTORY PATTERN
NOT
EFFECTIVE TURN KNOB
TO LEFT
TURN KNOB
TO RIGHT
TURN KNOB
SLIGHTLY TO
LEFT
NO
ADJUSTMENT
MADE
TURN KNOB
SLIGHTLY TO
RIGHT
BB DROPS FREELY
BB TRAVELS AT SHORT TRAJECTORY
PATH
BB TRAVELS DISTANCE AT FLAT
TRAJECTORY PATH
BB TRAVELS AT UNSTABLE SPEED AND
IRREGULAR PATH
BB TRAVELS FLAT IN SHORT DISTANCE,
THEN GOES UP IN CURVE AND DROPS
FREELY
EXTREMELY
EFFECTIVE
SLIGHTLY
PROPERLY
OVERLY
SAFE FIRE
M11A1 NS2
More Hop
Less Hop