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The Black Rain Ordnance SPEC15 Complete Upper is a ready-to-install assembly chambered in .458 SOCOM, built around a 16" 4150 chromoly barrel with a 1:14 twist rate. Its expanded ejection port supports reliable cycling of the big-bore cartridge, while the 15" M-LOK hybrid handguard provides a slim, adaptable mounting platform for accessories.
The upper arrives complete with a .458 bolt carrier group, a charging handle with an oversized tactical latch, a BRO .458 muzzle brake, and one metal magazine optimized for .458 SOCOM. Forged construction and American-made components make it a turnkey option for hunters and shooters who want the power of .458 SOCOM in a single assembly.
Key Features
Brand
Black Rain Ordnance
Model
SPEC15
Type
Complete Upper
Caliber
.458 SOCOM
Barrel Length
16 in
Barrel Material
4150 Chromoly
Twist Rate
1:14
Handguard
15" M-LOK Hybrid
Ejection Port
Expanded
Bolt Carrier Group
.458 Bolt Included
Charging Handle
Oversized Tactical Latch
Muzzle Device
BRO .458 Muzzle Brake
Magazine
One Metal Magazine Optimized for .458 SOCOM
Construction
Forged
Condition
New
Compatibility
Chambered in .458 SOCOM and designed for AR-15 pattern rifles. The upper includes a .458 bolt carrier group and a metal magazine optimized for .458 SOCOM.
What's included
Black Rain Ordnance SPEC15 Complete Upper Receiver
Complete bolt carrier group with .458 bolt
Charging handle with oversized tactical latch
BRO .458 muzzle brake
One metal magazine optimized for .458 SOCOM
Frequently asked questions
What is the barrel twist rate of the SPEC15 Complete Upper?
The 16" 4150 chromoly barrel has a 1:14 twist rate.
What is included with the upper?
It ships with a complete bolt carrier group with .458 bolt, a charging handle with oversized tactical latch, a BRO .458 muzzle brake, and one metal magazine optimized for .458 SOCOM.
