5" 5.56 NATO Micro ARP Sidewinder Pistol Upper Assembly – M-LOK
| Brand: | Moriarti Armaments |
| Product Code: | MAR-556-5-DIFFUSE |
| Availability: | In Stock |
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$229.95
- $429.95
Moriarti Micro ARP Series
5" 5.56 NATO Micro ARP Sidewinder Pistol Upper Assembly – M-LOK
The Moriarti 5" 5.56 NATO Micro ARP Sidewinder Pistol Upper Assembly is part of the Moriarti Micro ARP Series, featuring a compact 5-inch barrel configuration and distinctive Sidewinder blast diffuser.
This upper assembly features a 5" medium-profile 4150V steel barrel with a black nitride finish, 1:5 twist rate, and 5R rifling. The barrel is paired with a micro-length gas system and .750" low-profile gas block.
The assembly includes an A3 flat-top upper receiver with a black anodized finish, forward assist, dust cover, and 4" black free-floating M-LOK handguard. The Sidewinder blast diffuser distinguishes this configuration from other Moriarti Micro ARP upper assemblies.
Key Features
Micro ARP Series: Moriarti's compact AR-15 upper assembly family
Caliber: 5.56 NATO
Barrel: 5" medium-profile 4150V steel
Barrel Finish: Black nitride
Twist Rate: 1:5 with 5R rifling
Gas System: Micro-length
Gas Block: .750" low-profile
Upper Receiver: A3 flat-top, black anodized
Handguard: 4" black free-floating M-LOK
Muzzle Device: Sidewinder blast diffuser
Charging Handle: Optional, sold separately
Bolt Carrier Group: Optional, sold separately
Specifications
| Specification | Details |
|---|---|
| Manufacturer | Moriarti Armaments |
| Series | Micro ARP |
| Model | Sidewinder |
| Product Code | MAR-556-5-SIDE |
| Platform | AR-15 |
| Caliber | 5.56 NATO |
| Barrel Length | 5" |
| Barrel Profile | Medium |
| Barrel Material | 4150V Steel |
| Barrel Finish | Black Nitride |
| Barrel Twist | 1:5 |
| Rifling | 5R |
| Barrel Weight | 12 oz. |
| Gas System | Micro-Length |
| Gas Block Diameter | .750" |
| Muzzle Threads | 1/2×28 |
| Muzzle Device | Sidewinder Blast Diffuser |
| Upper Receiver | A3 Flat-Top Aluminum |
| Receiver Finish | Black Anodized |
| Handguard | 4" Black Free-Float M-LOK |
| Forward Assist | Included |
| Dust Cover | Included |
| BCG | Optional |
| Charging Handle | Optional |
Package Includes
One assembled Moriarti 5" 5.56 NATO Micro ARP Sidewinder upper
Installed 5" black nitride barrel
Installed micro-length gas system
4" black M-LOK handguard
Sidewinder blast diffuser
Forward assist and dust cover
Not Included: Bolt carrier group, charging handle, lower receiver, or magazine. Optional components are included only when selected separately.
Frequently Asked Questions
What distinguishes the Micro ARP Sidewinder from other Micro ARP uppers?
The Sidewinder configuration features a distinctive blast diffuser paired with a 5" barrel and 4" M-LOK handguard.
What is the barrel twist rate?
The 5" 4150V steel barrel features a 1:5 twist rate with 5R rifling and a black nitride finish.
Does the Sidewinder upper include a BCG and charging handle?
No. The bolt carrier group and charging handle are optional components sold separately.
Product Image Notice
Images may not be the exact representation of the product.
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