Complete 6.75" upper assembly kit for your MCX-RATTLER LT in 300BLK
Nearly 10 years ago the MCX LVAW was introduced and became the choice of Special Forces groups worldwide. With its 6.75” 300BLK design, the platform offered a replacement to sub-style platforms because of its ballistically advantageous caliber and a similar size footprint.
Now for the first time since its inception, the MCX-RATTLER LT upper assembly offers the same design that changed a generation of rifles with updated features that make it better than ever.
The MCX-RATTLER LT offers a 6.75” cold hammer forged barrel, compatibility with AR-style triggers, an adjustable gas system for suppressor optimization, a QD Clutchlok Muzzle Device and a M4 adapter kit to convert any M4 lower to utilize the folding capability of the MCX platform. Also, the new MCX-RATTLER LT design allows it to be compatible with all MCX-SPEAR LT parts, meaning any barrel or handguard from the MCX-SPEAR LT can interchange parts, allowing for easy caliber and length conversions. Advanced beyond any platform in its class, the MCX-RATTLER LT upper is the ultimate upgrade for your MCX or M4 lower.
Features:
- Adapts with any M4/AR15 spec lower assembly
- Dual rod recoil assembly eliminates buffer system
- M4 adapter allows for pic rail folding stock capabilities
- Adjustable gas system for suppressor optimization
- Quick change barrel design allows to easily swap calibers and barrel lengths
- Gas piston design reduces part exposure to carbon fouling
- Designed to go 20k rounds before any part replacements
- SLX/SLH Next Gen Suppressor designed QD Flash Hider for Clutch-Lok adaptability
- Ambidextrous charging handle with gas deflector
- Replaceable parts (cam path follower, feed ramp, forward assist/deflector, charging handle locking pins) allow for longer receiver life over standard AR designs.
- Tapered bolt design functions more reliably and lasts longer than standard square lug M4 bolt designs.
- Nitride coated cold hammer forged barrel for optimal accuracy and barrel life
Included items:
- Complete 6.75" 300BLK upper assembly includes our removable 3-prong flash-hider ready to accept our SLH & SLX suppressor systems.
- Receiver extension delete stock adapter so you may mount any folding or static stock or brace that uses a vertical 1913 rail system.
Specification
| SKU | UAMCX-300B-6B-LT-BLK |
|---|---|
| Model | SIG MCX-SPEAR LT |
| Barrel Length (In) | 6.75 |
| Bolt Carrier Group Included | Yes |
| Caliber | 300BLK |
| Charging Handle Included | Yes |
| Color | Black |
| Forward Assist | No |
| Free Floated Handguard | Yes |
| Handguard Length (in.) | 5.5 |
| Handguard Material | Aluminum |
| Muzzle Device | Clutch-Lok Tapered QD Flash Hider |
| Muzzle Thread Pitch | 5/8-24 |
| Operating System | Short-Stroke-Piston |
| Overall Length | 15.375 in |
| Weight | 3lb 9.6 0z |
| Receiver Finish | Anodized |
| Twist Rate | 1:5 |
