Maxim Defense MDX:508
Maxim Defense Industries · Personal Defense Weapon · In Production · 2020
Overview
The Maxim Defense MDX:508 is a compact CQB firearm in the MDX series, built on the AR-15 platform with an 8.5-inch barrel and the Gen 7 CQB telescoping pistol brace that extends from 5.375 inches to a full 10 inches of length-of-pull. Chambered in 5.56 NATO, .300 BLK or 7.62x39, it features the HATEBRAKE muzzle booster, an HK-height rail and an M-slot compatible handguard, with construction from 6Al-4V titanium, 17-4 stainless steel and 7075/6061 aluminum. The MDX series is field-tested for the Tier 1 community.
Specifications
| Weight (empty) | 2863 g (101.0 oz) |
| Overall Length | 546.1 mm (21.50") |
| Barrel Length | 215.9 mm (8.50") |
| Action Type | Gas Operated Direct Impingement |
| Firing Mechanism | Rotating Bolt |
| Trigger Type | Single Stage |
| Magazine Capacity | 30 rounds |
| Magazine Type | Detachable Box |
| Muzzle Velocity | 940 m/s (3084 fps) |
| Muzzle Energy | 1767 J (1303 ft·lbf) |
| Effective Range | 300 m (328 yd) |
| Barrel Rifling | Right Hand |
| Frame Material | Aluminum |
| Barrel Material | Steel |
| Stock Material | Polymer |
| Finish | Type Iii Anodized |
Calibers
- 5.56x45mm NATO · primary · SS109/M855 — also known as 5.56 NATO, .223 Rem
- .300 AAC Blackout — also known as 300 BLK, 7.62x35mm
- 7.62x39mm — also known as 7.62 Soviet, 7.62x39
Features
- Firing modes: Semi Automatic
- Feed systems: Stanag Detachable Box Magazine
- Safety mechanisms: Manual Thumb Safety
- Features: Gen7 Cqb Pistol Brace, Hatebrake Muzzle Booster, Hk Height Rail, M Slot Handguard, Ambidextrous Controls, Free Floating Barrel, Ar15 Magazine Compatible, Titanium Components
Variants
- MDX:508 SBR — Nfa Sbr
Production
Production years: 2020-present
Origin
Country of origin: United States
Notes
MSRP $2,695. Numeric suffix 508 denotes the ~8-inch (8.5") barrel. Thread pitch 1/2x28 (5.56) / 5/8x24 (.300 BLK, 7.62x39).