Sig Sauer

SIG Sauer M400 "Tread" Semi-Automatic AR-15 Rifle .223/5.56 30rd 16" Barrel - RM40016BTRD

Sig Sauer M400 "Tread" Semi-Automatic AR-15 Rifle .223/5.56 30rd 16" Barrel - RM40016BTRD - Complete Rifle - view 1
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Sig Sauer

Overview

The SIG Sauer M400 "Tread" Semi-Automatic AR-15 Rifle .223/5.56 30rd 16" Barrel - RM40016BTRD is a complete rifle. Compare prices from multiple merchants and find the best deal.

Specifications

MPNRM400-16B-TRD
PlatformAR-15
Caliber5.56 NATO
Barrel Length16.0
Gas System LengthMid-Length
Thread Pitch1/2x28
Action TypeSemi-Auto
Twist Rate1:8
ColorBlack
ComplianceStandard

Available Merchants(3)

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BattleHawk Armory logo
BattleHawk Armory
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$795
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Sportsmans Outdoor Superstore logo
Sportsmans Outdoor Superstore
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$850
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KY Gun Company logo
KY Gun Company
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$869
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Build history on GunPartPicker

Builders on GunPartPicker first added the SIG Sauer M400 "Tread" Semi-Automatic AR-15 Rifle .223/5.56 30rd 16" Barrel - RM40016BTRD to a build in April 2026.

It was out of stock everywhere we track for all of September 2026, and today none of the 3 retailers we track has it in stock right now. Listed prices start at $794.79 at BattleHawk Armory for when it comes back.

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