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Blacked out, upgraded 5.56 NATO Mid-Length AR-15 Build
With the BCM ® Standard 12.5" Carbine upper receiver, BCM Gunfighter MCMR M-LOK handguard and Microbest C158 HPT/MPI 5.56 bolt carrier group.
PlannedParts list for a rifle not built yet. Photos show the parts.
Updated
12 of 12 core parts · complete
19 parts|$2299.91
Platform:AR-15Caliber:5.56 NATOGas System:Mid-LengthLower:Sons of Liberty Gun Works
U
user_8dff9ddc1 / 19
Blacked out, upgraded 5.56 NATO Mid-Length AR-15 Build
With the BCM ® Standard 12.5" Carbine upper receiver, BCM Gunfighter MCMR M-LOK handguard and Microbest C158 HPT/MPI 5.56 bolt carrier group.
PlannedParts list for a rifle not built yet. Photos show the parts.
Updated
12 of 12 core parts · complete
11.5 inch SBR AR-15 Specs
Platform
AR-15
Caliber
5.56 NATO
Gas System
Mid-Length
Lower
Sons of Liberty Gun Works
How this build compares to other 11.5 inch SBR AR-15 builds
From parts picked in GunPartPicker builds · October 2026
The Geissele SSA-E X Lightning Bow is the #1 trigger in 11.5 inch SBR AR-15 builds on GunPartPicker, picked in about 1 in 4 of them.
- TriggerCompare with runner upGeissele SSA-E X Lightning Bow#1 · 24%Runner up: Geissele SSA X Lightning Bow9%
- Pistol GripCompare with top pickMagpul MOE K2+ Grip Polymer#9 · 3%Top pick: Magpul MOE K2 Grip Polymer Gray11%
- Charging HandleCompare with top pickGeissele / Super#10 · 2%Top pick: Radian Raptor & Talon Safety Selector15%
Often replaces the Geissele / Super
Start from this build, swap any part and compare live prices.
See popular 11.5 inch SBR AR-15 builds11.5 inch SBR AR-15 Parts List(19 parts)
Est. Total
$2299.91
Lower Receiver
$137.75Out of Stock
Platform: AR-15
Trigger Pin: .154
Finish: Hardcoat Anodized
Assembly: Stripped
Material: 7075-T6 Aluminum
Upper Receiver
$665.40In Stock
Platform: AR-15
Assembly: Complete
Color: Black
Caliber: 5.56 NATO
Finish: Hardcoat Anodized
Receiver Type: M4
Barrel Length: 12.5
Gas System Length: Carbine
Handguard
$206.95In Stock
Construction Type: Free-Float
Mounting Interface: M-LOK
Finish: Hardcoat Anodized
Color: Black
Charging Handle
Finish: Hardcoat Anodized
Material: 7075-T6 Aluminum
Color: Black
Hand: Ambidextrous
Platform: AR-15
Bolt Carrier Group
$129.95Out of Stock
Caliber: 5.56 NATO
Trigger
Type: Two-Stage
Platform: AR-15
Pull Weight: 1.5-5 lbs
Pistol Grip
$15.44In Stock
Grip Style: Standard
Material: Polymer
Color: Black
Foregrip
Mounting Interface: M-LOK
Grip Type: Angled
Color: Black
Storage: No
Safety
$41.76Out of Stock
Throw Angle: 90°
Type: Ambidextrous
Bolt Catch
$59.00In Stock
Magazine Release
$18.95In Stock
Color: Black
Type: Enhanced
Button Style: Standard
Finish: Hardcoat Anodized
Trigger Guard
Trigger Guard Style: Oversized
Color: Black
Finish: Hardcoat Anodized
Material: Aluminum
Takedown Pin
$49.99In Stock
Pin Type: Standard
Material: Titanium
Color: Black
Stock
End Plate
Type: QD End Plate
Color: Black
Material: Steel
Buffer Assembly
Assembly: Buffer Only
Buffer Tube Spec: Mil-Spec
Buffer Tube Type: Carbine
Iron Sights
$180.40In Stock
Position: Offset
Material: Steel
Fixed Folding: Fixed
Color: Black
Front Sight
$39.95In Stock
Fixed Folding: Folding
Position: Front
Illuminated: Non-Illuminated
Material: Polymer
Color: Gray
Rear Sight
$59.95In Stock
Color: Gray
Fixed Folding: Folding
Illuminated: Non-Illuminated
Position: Rear
Style: Polymer
Estimated Build Total
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