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TRIGGER SPRINGS, AR MONO, PINS, DISCONNECT
$19.00
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SKU: KIT-MONO-SPRING
Overview
Factory replacement trigger springs for current SIG modern sporting rifles, this parts kit is intended for owners maintaining compatible MCX and M400 platforms. It is designed for use as a full unit and requires firearm disassembly beyond field-stripped condition, so it is best suited to qualified service work rather than routine user installation. SIG SAUER notes that installation should be performed by certified armorers, and that improper fitting or part substitution may lead to malfunction or serious injury.
Why Hunters Choose the Sig Sauer
Factory Replacement
Parts for current SIG modern
Compatible Mcx,
MCX, M400, and 716i models
Designed As
Complete trigger spring kit
Intended Installation
As a full unit
Backed Clear
Installation and compatibility guidance
Key Features
- Factory replacement trigger springs for current SIG modern sporting rifles
- Compatible with MCX and M400 rifle models
- Installation requires disassembly beyond a field-stripped condition
- SIG SAUER specifies certified armorers for installation
- Parts kits are intended to be installed as a full unit
Best Used For
- Certified SIG SAUER armorers servicing current SIG modern sporting rifles
- Owners needing factory replacement trigger springs for compatible MCX or M400 rifles
- Armorer-level maintenance where full-unit installation and firearm disassembly are already planned
- Users replacing worn trigger spring components on supported SIG rifle platforms
Specifications
| Certified Armorer Requirement | SIG SAUER requires that only certified SIG SAUER armorers install these parts kits |
|---|---|
| Compatibility | MCXM400716516 |
| Factory Replacement | Factory replacement trigger springs for all current SIG modern sporting rifles |
| Installation Requirement | Installation of these parts kits requires disassembly of your firearm beyond a "field-stripped" condition |
| Warning | These parts kits are intended to be installed as a full unit. Any substitution of included parts may be incompatible and may lead to malfunction, serious injury, or death |
| Warranty Note | Any damage caused by the incorrect installation of these parts kits is not covered by your firearm's warranty |
Pros
- Factory replacement parts for current SIG modern sporting rifles
- Compatible with MCX, M400, and 716i models
- Designed as a complete trigger spring kit
- Intended for installation as a full unit
- Backed by clear installation and compatibility guidance
Considerations & Trade-offs
- Installation requires disassembly beyond a field-stripped condition, so this is not a simple drop-in replacement.
- SIG SAUER states these parts kits should only be installed by certified SIG SAUER armorers.
- The kit is intended to be installed as a full unit; substituting included parts may be incompatible and can create malfunction risk.
- Compatibility is limited to current SIG modern sporting rifles listed as MCX/M400/716/516.
Suggested Comparisons
- AR trigger spring kits
- Factory replacement firearm parts
- SIG modern sporting rifle maintenance parts
Suggested Accessories
- Firearm armorer tools
- Replacement pins
- Gun cleaning supplies
- Bench mat
Frequently Asked Questions
What firearms is this trigger spring kit compatible with?
It is listed as a factory replacement trigger spring kit for all current SIG modern sporting rifles, with compatibility noted for MCX M400 and 716i.
Is this a complete trigger assembly or just replacement springs?
The product is described as trigger springs, not a full trigger assembly. The description also says these parts kits are intended to be installed as a full unit.
Can this kit be installed with basic field-stripped disassembly?
No. The description states installation requires disassembly of the firearm beyond a field-stripped condition.
Who should install this parts kit?
SIG SAUER states that only certified SIG SAUER armorers should install these parts kits.
Are there any warnings about using only part of the kit?
Yes. The description warns that substituting any included parts may be incompatible and could lead to malfunction, serious injury, or death.