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Sig Sauer Mosquito Trigger Pull Weight

Published in Firearm Trigger Weight 2 mins read

The Sig Sauer Mosquito features a double-action/single-action (DA/SA) trigger system, offering different pull weights depending on the firing mode.

For the standard Sig Sauer Mosquito model, chambered in .22 LR:

  • Single-Action (SA) Trigger Pull: The trigger pull weight is 4.4 pounds.
  • Double-Action (DA) Trigger Pull: The trigger pull weight is 12.4 pounds.

Understanding DA/SA Trigger Systems

The double-action/single-action (DA/SA) trigger mechanism is common in many pistols, including the Sig Sauer Mosquito. This system provides versatility for different shooting scenarios:

  • Double-Action (DA) Mode:
    • When the hammer is down, pulling the trigger in DA mode first cocks the hammer and then releases it, firing the round.
    • This initial long and heavier pull (12.4 lbs) acts as a safety measure, requiring deliberate effort to discharge the firearm.
    • It's often used for the first shot after loading a round and lowering the hammer, or for subsequent shots if the user decocks the firearm.
  • Single-Action (SA) Mode:
    • After the first shot in DA mode, or if the hammer is manually cocked, the trigger resets to SA mode.
    • In SA mode, the hammer is already cocked, so pulling the trigger only releases the hammer, resulting in a much shorter and lighter pull (4.4 lbs).
    • This lighter pull allows for greater precision and easier follow-up shots.

Trigger Pull Weights at a Glance

To summarize the trigger pull specifications for the Sig Sauer Mosquito:

Trigger Mode Approximate Pull Weight
Single-Action (SA) 4.4 lbs
Double-Action (DA) 12.4 lbs

Practical Implications for Shooters

Understanding these distinct trigger pull weights is crucial for anyone handling a Sig Sauer Mosquito:

  • Training: New shooters should practice extensively with both DA and SA modes to become accustomed to the different pull weights and reset points.
  • Accuracy: The lighter single-action pull typically allows for more precise shot placement, which is beneficial for target shooting.
  • Safety: The heavier double-action pull provides an additional layer of safety, reducing the likelihood of an accidental discharge, especially when carrying with a round in the chamber.

The Sig Sauer Mosquito's DA/SA system offers a balanced approach, combining a safety-conscious initial pull with a lighter, more precise follow-up pull.