Smith & Wesson Sigma Instructions Manual

11
•Use only commercially manufactured ammunition with
internal ballistic pressures which are in strict accordance 
with the specifications of the Sporting Arms and 
Ammunition Manufacturers’ Institute (SAAMI).
•Be certain all ammunition you use complies with the 
SAAMI specifications. If you are uncertain, contact your 
ammunition supplier for verification.
C.
MISFIRES
•If your firearm fails to fire when the trigger is pulled 
(misfires), keep the firearm pointed in a safe direction, 
remove your finger...

12
AMMUNITION  CONT’D.
E.AMMUNITION WARNINGS
•“Plus-P” (+P) ammunition generates pressures in excess of 
the pressures associated with standard ammunition. Such 
pressures may affect the wear characteristics or exceed the 
margin of safety built into some revolvers and could 
therefore be DANGEROUS.
•“Plus-P” ammunition should not be used in medium
(K frame) revolvers manufactured prior to 1958. Such
pre-1958 medium (K-frame) revolvers can be identified by 
the absence of a model number stamped inside...

13
MODEL NUMBER
IDENTIFICATION
MODEL NUMBER
FIGURE 2
FIGURE 2b
Equipment Rail
Trigger Guard
Trigger
Grip
Magazine
Magazine
Release
Front Sight
FrameSlide
Slide Stop
Notch
Slide Stop 
FIGURE 2aSERIAL NUMBER
Rear Sight
Take Down
Catch 

14
INSPECTING YOUR
PISTOL
When you inspect your pistol, you should first check for yourself
to ensure that it is unloaded. To do this, grasp the pistol with
your finger off the trigger and outside the tr
igger guard, point the
pistol in a safe direction, depress the magazine release, and
remove the magazine.
With the pistol still pointing in a safe direction, grasp the
serrated sides of the slide from the rear with the thumb and
fingers as shown in Figure 3, and briskly draw the slide fully
rearward in...

LOADING
•Do not load the pistol until you are ready to use it.
Keep your finger outside the trigger guard until you are ready
to fire.
WARNING: SMITH & WESSON SIGMA SERIES
PISTOLS ARE CAPABLE OF FIRING EVEN WHEN THE
MAGAZINE HAS BEEN REMOVED IF THE TRIGGER IS
PULLED.
If the magazine is removed with a round left in the chamber, be
sure to holster or otherwise safely secure the pistol under your
direct control while the magazine is being reloaded.
•Only use Smith & Wesson magazines specifically...

WARNING: Do not use excessive upward force when
inserting a loaded magazine into the pistol. Excessive
upward force could cause the slide to move forward,
chambering a round and making the pistol ready to fire.
•To make sure that the magazine is fully and securely
inserted, apply some removal pressure to the exposed 
portion of the magazine butt plate.
•Press down on the slide stop to release the slide and allow it 
to carry fully forward. This strips a cartridge from the 
magazine and seats it in the...

17
FIRING
•Keep the pistol pointed in a safe direction and your finger 
outside the trigger guard until you are ready to fire. Each 
shot will be fired in the double action mode. While holding 
the grip firmly, pull the trigger fully to the rear. As the trigger 
is drawn fully to the rear, the striker assembly is released, 
striking the cartridge primer. Upon firing the slide moves 
rearward thereby extracting and ejecting the spent cartridge 
case. The slide then returns forward feeding the next...

18
CLEARING MISFIRES
•If, during firing, a cartridge fails to fire, the chamber must be 
manually cleared. Wait ten seconds while keeping the pistol
pointed in a safe direction. Grasp the serrated sides of the slide 
from the rear and briskly pull the slide fully rearward to eject the 
misfired round. Keep your finger off of the trigger and out of the 
trigger guard. Do not obstruct the ejection port, and do not 
attempt to catch the round by placing your hand over the ejection 
port. (See figure 8)...

19
FIGURE 8FIGURE 9
UNLOADING
•Point the pistol in a safe direction, grasp the serrated sides of 
the slide from the rear with the thumb and fingers as shown in 
Figure 9, and briskly draw the slide fully rearward in order to 
extract any cartridge from the barrel chamber and clear it 
from the pistol. Do not obstruct the ejection port because 
doing so can interfere with ejection of a cartridge and thereby 
creates the risk of exploding an unchambered cartridge and 
possible injury. Lock the slide in...

20
FIGURE 11
FIGURE 13FIGURE 14
WARNING: The recoil spring is under pressure.
Control the recoil spring and the guide so that they
do not fly out and cause injury.
•Remove the recoil spring and barrel. (Figure 16)
NOTE:
No further disassembly is recommended, as the pistol may be
properly cleaned and lubricated when field-stripped as described
above.
•Make certain that the
chamber is clear. (Figure 11)
•With the pistol still pointing in 
a safe direction and the slide 
closed, pull the trigger once 
and...