Maxim Defense

Maxim Defense PDX 505-SPS MXM50822 Pistol 300 Blackout 5.5" Barrel 20+1 Semi-Auto SCW Pistol System, Arid Finish.

Maxim Defense Maxim Defense PDX 505-SPS MXM50822 Pistol 300 Blackout 5.5" Barrel 20+1 Semi-Auto SCW Pistol System, Arid Finish.
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Maxim Defense

Overview

The Maxim Defense PDX 505-SPS MXM50822 Pistol 300 Blackout 5.5" Barrel 20+1 Semi-Auto SCW Pistol System, Arid Finish. is a complete rifle. Compare prices from multiple merchants and find the best deal.

Specifications

MPNMXM50822
PlatformAR-15
Caliber300 Blackout
Gas System LengthPistol
Thread Pitch5/8x24
Action TypeSemi-Auto
Twist Rate1:5
ColorFDE
Barrel Length5.5
ComplianceStandard

Available Merchants(2)

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Classic Firearms
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$2,246
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BattleHawk Armory logo
BattleHawk Armory
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$2,246
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Price and stock

The Maxim Defense PDX 505-SPS MXM50822 Pistol 300 Blackout 5.5" Barrel 20+1 Semi-Auto SCW Pistol System, Arid Finish. was out of stock everywhere we track for all of September 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $2,245.50 at Classic Firearms for when it comes back.

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