SIG Sauer PMCX-300B-6B-LT-PCB MCX Rattler LT 300 Blackout 6.75 Black PCB

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Sig Sauer PMCX-300B-6B-LT-PCB MCX Rattler LT 300 Blackout 6.75 Black PCB - Complete Rifle - view 1
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Sig Sauer

Overview

The SIG Sauer PMCX-300B-6B-LT-PCB MCX Rattler LT 300 Blackout 6.75 Black PCB is a complete rifle. Compare prices from multiple merchants and find the best deal.

Specifications

MPNPMCX-300B-6B-LT-PCB
PlatformAR-15
Caliber300 Blackout
Barrel Length6.75
Gas System LengthPistol
Thread Pitch5/8x24
Action TypeSemi-Auto
Twist Rate1:5
ColorBlack

Available Merchants(8)

Prices checked

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BattleHawk Armory logo
BattleHawk Armory
Shipping varies
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In Stock
$2,499.99
Brownells logo
Brownells
Free shipping
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Out of Stock
$2,499.99
Primary Arms logo
Primary Arms
Free shipping
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Out of Stock
$2,499.99
Classic Firearms logo
Classic Firearms
Shipping varies
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Out of Stock
$2,499.99
KY Gun Company logo
KY Gun Company
Flat rate shipping
Shipping Speed
Out of Stock
$2,499.99
Sportsmans Outdoor Superstore logo
Sportsmans Outdoor Superstore
Flat rate shipping
Shipping Speed
Out of Stock
$2,499.99
GritR Sports logo
GritR Sports
Shipping varies
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Out of Stock
$2,499.99
MidwayUSA logo
MidwayUSA
Free shipping
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Out of Stock
$2,729.99

Build history on GunPartPicker

Builders have added the SIG Sauer PMCX-300B-6B-LT-PCB MCX Rattler LT 300 Blackout 6.75 Black PCB to their builds on GunPartPicker since August 2026. Since April 2026, it ranks #86 of the 593 complete rifles builders have added.

It was in stock most times we checked in October 2026, but today only BattleHawk Armory has it in stock. Prices barely moved in October 2026, holding around $2,499.99, with no real sale all month. Buying today, the lowest price is $2,499.99 at BattleHawk Armory, which matches the best price we saw in October.

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