MAXIM DEFENSE MDX
Posted Jun 15, 2023
-506 lower
MAXIM DEFENSE MDX-506 lower is a lightweight but durable gun lower receiver made from a reinforced polymer composite. It is designed to be used with both AR-15 and AR-10 style platforms. The MDX-506 is one of Maxim Defense's most popular lower receivers for carbine or sporting rifles and is available in several colors and barrel configurations.
I’ve been running the Maxim Defense MDX-506 lower for a couple of months now and wanted to write an in-depth review of what I’ve experienced so far. I’ve found that the lower receiver has proven to be reliable and durable, it looks great, and the overall build quality is outstanding.
The first thing that stands out about the MDX-506 lower is the construction and materials used. It is made from a reinforced polymer composite which makes the lower receiver ultra-lightweight and incredibly durable. The lower receiver has been designed to be compatible with AR-15 or AR-10 style platforms and is available in multiple barrel configurations and colors. This is great for customers looking to match the lower receiver to their existing parts or components.
The lower receiver has several features and design elements which make it stand out from the crowd. One of the most unique features is the integrated trigger guard. This is a component that is machined into the lower at the factory and is designed to provide a strong and secure anchor point for your trigger finger. This results in much smoother trigger pulls and a more consistent reception on the trigger.
The MDX-506 also features an enlarged magazine well which allows you to easier insert magazines during reloads and ensure fast and reliable reloads. The enlarged magazine well is also designed to help with the controlled retention of magazines. This is great for defensive or competition shooting, as it helps the shooter keep the magazine in place during high stress or rapid cycle situations.
The MDX-506 also features recessed bolt catch and release button. This is an important feature as it helps ensure the bolt catch lever and release button are properly engaged when needed and also helps with the clean look of the lower receiver.
When it comes to the overall build quality of the lower receiver, it is top-notch and really stands out from other brands. One of the most impressive aspects of the build quality is the finish which is not only tough but also aesthetically pleasing. The finish is very durable and can withstand wear and tear from rigorous use.
The other component where the MDX-506 really stands out is in regards to the takedown pins. These are designed to ensure a secure fit with minimal wobble or play between the upper and lower receiver. This means that your rifle will stay secure and will be ready to rock when you need it in a pinch.
Overall, I’ve been impressed with the MAXIM Defense MDX-506 lower. The overall build quality and finish are amazing, the unique features such as the integrated trigger guard and enlarged magazine well make it system stand out, and the lightweight but durable construction mean that you won’t have to worry about wear and tear anytime soon. All in all, I highly recommend the MDX-506 lower and think it’s an excellent value for the money.
Pros & Cons
Pros:
- Extended length for a more comfortable shooting experience
- The lightweight construction offers a comfortable shooting experience even during extended fire
- The unique design increases accuracy and allows for a more stable firing platform
- The collapsible design allows for easy storage and transport
- Compatible with most AR-15s
- Features mil-spec gearbox and trigger assembly
- Innovative quick-change barrel system allows for quick swapping between barrel lengths
- Ambidextrous magazine release and charging handle
Cons:
- Can be a bit pricey
- The collapsible stock is uncomfortable when used in an unsupported shooting position
- The barrel swap system can be a bit difficult to use
- No swivel mount attachment points for add-on accessories
- Not compatible with all AR-15s due to some design differences
- Mil-spec trigger assembly is not as adjustable as some other models
Who Should Buy
MAXIM DEFENSE MDX is a CQB pistol brace that is designed for use on AR-15 style rifles. It is intended for recreational and professional individuals who use the firearm for target shooting, home defense, or other forms of sport shooting.
Those who should buy the MAXIM DEFENSE MDX are experienced or amateur enthusiasts seeking to customize their AR-15 style rifle with a high-quality and durable CQB pistol brace. It is a great accessory for anybody looking to increase the accuracy, control, and comfort of their firearm.
Those who should not buy the MAXIM DEFENSE MDX are individuals who are looking for a fully functional buttstock or seeking to use the brace for use with a full-auto firearm. This product is intended to be used as a pistol brace and not a buttstock substitute, and it is not designed to be used with a full-auto firearm.
Comparisons
| MAXIM DEFENSE MDX | SMITH & WESSON PERFORMANCE CENTER PC1911 | WILSON COMBAT CQB TACTICAL LE | HECKLER & KOCH HK 416 |
|---|---|---|---|
| Caliber: 5.56 NATO | Caliber: .45 ACP | Caliber: .45 ACP | Caliber: 5.56 NATO |
| Length: 20.2" | Length: 8.7" | Length: 8.9" | Length: 26.7" |
| Weight: 7.4lbs | Weight: 39.6oz | Weight: 38.6oz | Weight: 6.7lbs |
| Magazine: 30rd | Magazine: 7rd | Magazine: 8rd | Magazine: 30rd |
Features / Specs
• Overall Length: 35.75" - 39" (collapsed - extended)
• Weight: 5.2 lbs
• Buttstock: 6-position, adjustable for length of pull
• Cheek Riser: 4-position, adjustable
• Handguard: M-LOK
• Pistol Grip: MDX non-adjustable angled grip
• Muzzle Device: Compatible with Mil-Spec A2 flash hiders & non-suppressing brakes
• Buffer Tube: AR-10
Popular Accessories
-507?
- Maxim Defense CQB Stock
- Maxim Defense Arm Brace
- Strike Industries ARifle Roller Lock Bolt Carrier Group
- Maxim Defense AR-15 Mag Well Grip
- Burris AR-332 Prism Sight
- Magpul MOE-K2 Grip
- Strike Industries AR-15 Enhanced Castle Nut and Receiver Extension
- Seekins Precision SP223 Lower Parts Kit
- Geissele Automatics SSA Trigger
- Magpul PMAGs
- Frontal Pointer Device
Accuracy
MAXIM DEFENSE MDX is an exceptional choice when it comes to accuracy. It is precision-made with small-batch manufacturing processes that ensure repeatable accuracy shot after shot. It features a trigger reset that speeds up follow-up shots and an aerodynamic profile that reduces drag for improved accuracy over greater distances. With these features combined, it makes the MDX an ideal platform for precision shooting. Furthermore, the ability to extend the brace to adjust its fit to the user further facilitates precision shooting.
