Maxim Defense SDX:505
Maxim Defense Industries · Personal Defense Weapon · In Production · 2023
Overview
The Maxim Defense SDX:505 is the most compact member of the SDX series of integrally suppressed firearms, combining a 5.5-inch barrel with an integrated DSX-D suppressor built on MonoKore technology. SOCOM-tested across multiple calibers, the system reduces sound signature and recoil while improving accuracy, and rides on a Gen 7 CQB stock with HK-height rail and M-slot handguard. It is chambered in .300 BLK, 5.56 NATO or 7.62x39 and built from 6Al-4V titanium and 17-4 stainless steel.
Specifications
| Weight (empty) | 3345 g (118.0 oz) |
| Overall Length | 657.9 mm (25.90") |
| Barrel Length | 139.7 mm (5.50") |
| Action Type | Gas Operated Direct Impingement |
| Firing Mechanism | Rotating Bolt |
| Trigger Type | Single Stage |
| Magazine Capacity | 30 rounds |
| Magazine Type | Detachable Box |
| Muzzle Velocity | 625 m/s (2051 fps) |
| Muzzle Energy | 1585 J (1169 ft·lbf) |
| Effective Range | 200 m (219 yd) |
| Barrel Rifling | Right Hand |
| Frame Material | Aluminum |
| Barrel Material | Steel |
| Stock Material | Polymer |
| Finish | Dlc Type Iii Anodized |
Calibers
- 5.56x45mm NATO · SS109/M855 — also known as 5.56 NATO, .223 Rem
- .300 AAC Blackout · primary — 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: Integral Dsx D Suppressor, Monokore Suppressor Technology, Gen7 Cqb Stock, Hk Height Rail, M Slot Handguard, Ambidextrous Controls, Ar15 Magazine Compatible, Hearing Safe, Titanium Components
Production
Production years: 2023-present
Origin
Country of origin: United States
Notes
MSRP $3,695. SDX = suppressed DX platform. The 505 suffix denotes the 5.5" barrel. Built to order, 4-6 weeks.