1. Introduction, Technical Specs and Safety on the Range
SIG-550/Stgw-90
Introduction, Technical Specs and Safety on the Range

2. Main Features Main differences between SIG-550 and Stgw-90:
SIG-550: Semi Automatic, Caliber 5.56mm (NATO) Stgw 90: Fully Automatic, Caliber 5.6mm x 45mm
Stgw = Sturmgewehr = Assault Rifle
Introduced to the Swiss Army in 1990
Replacement for the earlier Stgw-57
Used by FBI, DEA, GSG9 (Germany), Special Forces in Argentina, Brazil, Canada, France, Macau, Indonesia, Malaysia, Spain, USA
Considered one of the most accurate and most expensive weapons on market

3. Main Features Rate of fire: approx. 600-900 rounds/min
Effective range: Max. 400m
Weight: 4.1kg (empty), 4.35kg (full)
Magazine Capacity: 5, 20 or 30 rounds (inter-lockable)
Action: Gas operated (not blow-back)
Last round catch
Muzzle velocity: 905 m/s
Length: 1m (extended stock)
One-hand operation by left and right hand possible
S = Safe, 1 = Single Fire, 3 = 3 round burst, 20 = auto
Developed by the Swiss Industry Gesellschaft (SIG)

4. Main Parts Rear Sight (rotating, keep on #2) Cartridge Ejector Opening
Front Sight (check if night vision down)
Bi-Pod
Barrel – Stock – Trigger Unit
Hand Rest
Bolt Catch Lever (can also be operated left hand with Cocking Lever)
Cartridge Ejector Opening
Magazine Lock
Bolt Carrier and Cocking Lever
Magazine
Safety Catch “S” and “1”

5. Safety Treat all guns loaded at all times
Do not move any rifles under ANY circumstances
Ear protection!
You are responsible for your actions!
In case of problems, do not manipulate. Apply safety catch, raise your hand and wait for assistance
“1” only after command “Watch & Shoot”
Always “S” BEFORE lowering rifle
No mobile phone on range
No non-shooters beyond red line

6. Admin Who has not yet read Range Order?
Who has not yet signed Indemnity Form?

7. Flags and Warning Signs

8. Procedure and Commands
Always follow the Range Officer’s commands:
Before shooting:
1. “LOAD”: insert magazine, DO NOT yet cock the rifle!
2. “READY”: Cock rifle
3. “WATCH & SHOOT”: Release safety catch, fire
After or during shooting:
1. “HOLD YOUR FIRE”: Immediately cease fire and apply safety catch
2. “UNLOAD”: Remove Magazine and remove cartridge (if necessary). DO NOT YET STAND UP!
3. “CLEAR”: Stand up and check your targets

9. Position Rule #1: Be comfortable
Natural relaxed position that avoids muscle fatigue
No tension!
Natural point of aim!
Leave all your belongings behind (keys, mobile etc.)
Body & barrel form one line
Legs spread apart (3 point)
Non-firing hand on stock (keep away from cartridge ejector opening!)

10. Sight Alignment Align target Front sight Rear sight
Target needs to “sit on table” (NOT center!)
Ring around front sight must be equal
Keep rifle vertical!

11. Common Aiming Errors
A: Distance between eye and rear sight is too far: Shots scattered around target
B: Rear sight too low: Shots above target
C: Rear sight too high: Shots below target
D: Rear sight left or right: Shots left or right of target
E: Rifle is not vertical: Shots left or right below target

12. How to become a Marksman
Check your position and find “natural point of aim”
Once found the NPA, don’t change your body position
Avoid any tension or muscle fatigue
Check your alignment between target and sights
Prevent trigger jerking (squeeze a lemon instead)
Natural breathing pause at about 25% exhalation
Try to look after the bullet
Concentration is key! (double ear protection)
Head should be as upright as possible
Avoid eye strain

13. How to become a Marksman
Slight movements of the sights is normal. Timing is key!
Don’t tension your muscles in anticipation of recoil
Use the middle of the pad of last digit
Pull trigger straight backwards
Find trigger point, hold your breath, squeeze the lemon and look after the bullet
Don’t be afraid to repeat (if no time-pressure): Release trigger, move your eye to green grass, relax your hand, breath normally, start over