Home / Rifles / Maxim Defense
Maxim Defense Industries SDX 505 .300 AAC Blackout 5.5 Threaded Barrel 30-Rounds

Maxim Defense SDX 505 Suppressed SBR 300 Blackout 5.5" 30-Round Rifle

$2,886.44 0 in stock at 2 retailers

Specifications

Caliber
Model
MPN
MXM-49818
UPC
680017498184
Action
Semi-Auto
Barrel Length
5.5"
Capacity
30 Rounds
Fits
Mil-Spec AR-15 buffer tube, Maxim CQB stock
Color
Black

Description

Maxim Defense Industries SDX 505 Features The Maxim Defense SDX 505 is built on a semi-automatic action chambered in 300 AAC Blackout a cartridge purpose built for short barrels and suppressed fire making it a natural match for this platform s 5.5 threaded barrel. The threaded muzzle accepts a suppressor or muzzle device letting the shooter tailor the gun s signature and recoil impulse to the mission at hand. Maxim s SDX two piece handguard wraps the barrel with mounting space for lights optics and other accessories while keeping the overall package slim for maneuvering in tight spaces. A 30-round magazine capacity means the shortened receiver loses nothing in firepower compared to a full-length carbine. The MD-CQB stock folds and adjusts to shrink the overall length further for storage and transport while still providing a stable cheek weld and length of pull when shouldered for precise shots. An ALG Combat Trigger replaces the mil-spec trigger group with a crisper more consistent break that improves accuracy potential across the board. Finished entirely in Black the SDX 505 presents a clean duty-ready profile suited to a range of lighting and optic setups. Together these features make the SDX 505 a serious choice for operators and civilian shooters who need a compact suppressor-ready SBR platform. Maxim Defense Industries SDX 505 Specifications Manufacturer: Maxim Defense Industries Model: SDX 505 Caliber: 300 AAC Blackout Capacity: 30+1 Barrel Length: 5.5 Color: Black Stock: MD-CQB Trigger: ALG Combat Trigger Handguard: SDX Two Piece Handguard Action: Semi Auto Available At: ARMSAGORA

Similar Products

Stay Connected

Join our newsletter for the latest updates and exclusive deals.

ARMSAGORA

Compare prices on firearms, ammunition, and accessories from hundreds of trusted retailers. Find the best deals, track prices, and build your own loadouts.

© 2026 ARMSAGORA. All rights reserved.
Not an FFL licensed dealer. ARMSAGORA is a free product comparison tool. Some links to retailers are affiliate links: we may earn a commission when you buy, at no extra cost to you.