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user_fa849ff1
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Mk18 + 1 5.56 NATO Carbine AR-15 Build
With the Aero M4E1 Stripped 5.56mm upper receiver, Ballistic Advantage Modern barrel and Daniel Defense MK18 RIS II handguard.
Updated
9 of 12 core parts
27 parts|$5020.10(26/27 priced)
Platform:AR-15Caliber:5.56 NATOOverall Length:30.5"Gas System:CarbineLower:Aero PrecisionWeight:8
About this build
happy with this one picked up the Superlative Arms gas block
U
user_fa849ff11 / 4
Mk18 + 1 5.56 NATO Carbine AR-15 Build
With the Aero M4E1 Stripped 5.56mm upper receiver, Ballistic Advantage Modern barrel and Daniel Defense MK18 RIS II handguard.
Updated
9 of 12 core parts
happy with this one picked up the Superlative Arms gas block
Shop the parts$5020.10(26/27 priced)
11.5 inch SBR AR-15 Specs
Platform
AR-15
Caliber
5.56 NATO
Overall Length
30.5"
Gas System
Carbine
Lower
Aero Precision
Weight
8
How this build compares to other 11.5 inch SBR AR-15 builds
From parts picked in GunPartPicker builds · November 2026
The Geissele SSA X Lightning Bow is the #2 trigger in 11.5 inch SBR AR-15 builds on GunPartPicker, picked in about 1 in 11 of them. 2% of 11.5 inch SBR AR-15 builds share at least 3 parts with this one.
- TriggerCompare with top pickGeissele SSA X Lightning Bow#2 · 9%Top pick: Geissele SSA-E X Lightning Bow25%
- Barrel
- Charging HandleCompare with top pickGeissele / Super#5 · 6%Top pick: Radian Raptor & Talon Safety Selector14%
Often replaces the Aero Breach Small Levers
- Pistol GripCompare with top pickB5 Systems Type 23 P-Grip#9 · 3%Top pick: Magpul MOE K2 Grip Polymer Gray11%
Often swapped for the B5 Systems Type 22 P-Grip
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(27 parts)
Est. Total
$5020.10
Lower Receiver
$154.99Out of Stock
Assembly: Parts Kit
Platform: AR-15
Trigger Pin: .154
Finish: Hardcoat Anodized
Material: 7075-T6 Aluminum
Upper Receiver
$134.99Out of Stock
Receiver Type: M4E1
Caliber: 5.56 NATO
Material: 7075-T6 Aluminum
Assembly: Stripped
Platform: AR-15
Color: Black
Barrel
Coating: Nitride
Gas System Length: Carbine
Gas Block Diameter: .750
Finish: Nitride
Barrel Profile: Government
Thread Pitch: 1/2x28
Barrel Length: 11.5
Caliber: 5.56 NATO
Twist Rate: 1:7
Handguard
$501.00In Stock
Color: FDE
Handguard Length: 9.55
Mounting Interface: Picatinny
Finish: Hardcoat Anodized
Platform: AR-15
Charging Handle
Hand: Ambidextrous
Material: Aluminum
Finish: Hardcoat Anodized
Color: FDE
Platform: AR-15
Trigger
Platform: AR-15/AR-10
Trigger Bow: Hybrid
Adjustable: No
Type: Two-Stage
Gas Block
$260.99Out of Stock
Mounting Type: Clamp-On
Gas Block Diameter: .750
Profile: Adjustable
Adjustable: Yes
Material: Steel
Pistol Grip
$19.99In Stock
Color: FDE
Material: Polymer
Grip Style: Standard
Foregrip
$90.16In Stock
Color: FDE
Mounting Interface: Picatinny
Grip Type: Vertical
Storage: No
Muzzle Device
$74.99In Stock
Finish: Black
Muzzle Device Type: Flash Hider
Thread Pitch: 1/2x28
Material: Steel
Caliber: Multi
Color: Black
Safety
Type: Ambidextrous
Forward Assist
Material: Aluminum
Style: Low Profile
Color: Black
Assembly: Complete
Dust Cover
$15.95In Stock
Material: Polymer
Color: FDE
Dust Cover Style: Enhanced
Bolt Catch
$14.95In Stock
Type: Enhanced
Finish: Phosphate
Material: Steel
Color: Black
Magazine Release
Color: Black
Type: Ambidextrous
Takedown Pin
Material: Steel
Pin Type: Pin Set
Color: Black
Stock & Brace
Stock Type: Collapsible
Tube Spec: Mil-Spec
Color: FDE
Material: Polymer
End Plate
Type: Enhanced
Color: FDE
Material: 6061-T6 Aluminum
Buffer
Assembly: Spring Only
Buffer Tube Spec: Mil-Spec
Buffer Tube
Buffer Tube Spec: Mil-Spec
Assembly: Tube Only
Color: FDE
Suppressor
$539.99Out of Stock
Caliber: .308 Win
Mount Type: Direct Thread
Length: 5.1
Color: Black
Optic
$815.00Out of Stock
Optic Type: Holographic
Color: FDE
Optic Mount
Mount Type: Magnifier Mount
Height: 2.26"
Magnifier
$527.54In Stock
Magnification: 5x
Color: FDE
Light
Light Type: Flashlight
Color: FDE
Laser
$269.99Out of Stock
Modes: High, Low
Battery Type: AA 1.5V
Material: 6061-T6 Aluminum
Output: Infrared
Switch
$140.00In Stock
Mounting Interface: Picatinny
Switch Type: Remote Switch
Compatibility: Surefire / Crane Laser
Mount Type: Picatinny
Color: Black
Estimated Build Total(26 of 27 parts priced)
$5020.10Other Builds Using These Parts
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