18" Custom Ballistic Advantage & Aero Precision AR .308 WIN Complete Upper Receiver with SLR Rifleworks Sentry 7 Adjustable Gas Block - FREE SHIPPING

$ 1,048.85

This complete custom AR .308 WIN upper receiver has been designed and purpose built from start to finish for solid, accurate and quick deployment in a tactical, close quarters or field environment. Each is hand built by order from the highest quality components available with 16 demanding quality inspections along the way that must be passed before shipment. Absolutely zero inspection failures are allowed. 

Starting with a 7075 T-6 billet aluminum M5 (.308) stripped upper receiver from Aero Precision and a premium tactical government profile 18" barrel by Ballistic Advantage, this well thought-out upper receiver features an ultra light-weight 15" Keymod free-float handguard by UTG PRO, a mil-spec style .308 charging handle with an easy to grasp extended latch, a hand-fitted low profile gas block, an A2 style "bird cage" flash hider and is fully lapped for accuracy. 

Includes your choice of either Aero Precision's phosphate M5 bolt carrier group or Aero Precision's nickel boron (NiB) bolt carrier group custom coated by FAIL ZERO. Just choose your bolt carrier group by selecting it using the drop-down list above.

IMPORTANT: Because these upper receivers are hand-built by order and because of the rigorous and demanding inspections and testing they must pass prior to shipment please allow up to 30 business days from your order for delivery.


This Complete Upper Receiver Features The Following Quality Components:


Aero Precision M5 Upper Receiver

Aero Precision M5 Upper Receiver

The Aero Precision M5 .308 Assembled Upper Receiver comes with both the port door and forward assist hardware pre-installed. Forged from 7075-T6 aluminum, this assembled upper is precision machined to accept standard .308 components and is the perfect upper for your next big bore build. 

  • Precision Machined from 7075 T-6 Aircraft Grade Aluminum
  • Black Hard Coat Anodized
  • M4 Feedramps
  • .2795 takedown pin holes (DPMS Pattern)
  • Lazer engraved T-marks
  • DPMS High Profile (.210) Tang)
  • Includes port door and forward assist

15" UTG PRO Ultra-Slim Keymod Free Float Handguard

UTG PRO Ultra-Slim 15" Keymod Handguard for AR .308 Rifles

The UTG Pro 15" LR-308 KeyMod free float rail features the popular KeyMod accessory attachment system allowing for weight savings and unmatched air flow which helps your barrel cool faster. This rail is light weight, has great ergonomics without loss of strength and durability. The KeyMod Accessory Attachment System is designed to be a recoil resistant, direct and secure attachment method for accessories with precise and reliable “return-to-zero” removing and reinstalling accessories. The UTG Pro comes complete with its own proprietary barrel nut and tool making installation a snap. 

Note: This rail has been designed for perfect compatibility with the Aero Precision M5 and other DPMS pattern high profile upper receivers and does not mount flush with DPMS pattern low profile upper receivers.

  • Proudly made in the U.S.A.
  • Compatible with DPMS profile LR-308 High Profile Receivers and Variants Using the Same Dimensions
  • 15" Single Rail, Super Slim, Keymod Compatible, Free-floating Hand guard with Proprietary Barrel Nut Design
  • 112 Keymod Compatible Slots on 7 Keymod Compatible Slot Tracks for Mounting Keymod Compatible Rails and Accessories with the Most Flexibility in Diverse Applications
  • Super Lightweight with Top Rail in Perfect Alignment with Flat Top Receiver to Form a Continuous Picatinny Mounting Platform
  • Includes 2 Keymod Compatible Picatinny Rail Sections, 4 Slot and 8 Slot, for Limitless Accessory Customization Option
  • Features Integral Anti-rotation Tabs for Perfect Alignment and Rock-solid Locking with Upper Receiver
  • Ergonomic Octagonal Profile with Well Placed Grooves on Rail Surface for Solid Grip, Air-Accelerated Heat Release and Superior Handling Comfort
  • Scalloped Top Picatinny Rail Edges for No-Snag Easy Accessory Mounting
  • Precision Machined from 7075-T6 Aerospace Grade Aluminum with Hard Black Anodizing


Ballistic Advantage 18" .308 WIN Tactical Government Mid-length Barrel

Ballistic Advantage 18" Tactical Government AR .308 Barrel 

This premium .308 WIN chambered 16 inch Tactical Government Profile Barrel is built for accuracy in a light-weight, easy to manipulate package. Precision machined from 4150 Chrome Moly Vanadium steel with a durable QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension.

  • Caliber:                       .308 WIN
  • Length:                        18”
  • Twist:                           1:10
  • Finish:                          Parkerized
  • Profile:                         Tactical Government
  • Material:                       4150 Chrome Moly Vanadium, Heat Treated to RC 28-32 Hardness, and Stress Relieved
  • Feed Ramps:              Yes
  • Flutes:                         N/A
  • Gas System:               Mid-Length
  • Gas Block Diameter:  0.750
  • Gas Hole Diameter:    0.089

SLR Rifleworks Sentry 7 Set Screw Adjustable Gas Block - QPQ Black Nitride

 SLR Rifleworks Sentry 7 Adjustable Gas Block - QPQ

  • 100% Gas seal allows full cut off and prevents gas from fouling metering screw
  • Complete disassembly is simple and take less than 10 seconds
  • Metering screw and screw bore design allows repeatability and reliability only SLR has been able to deliver
  • Single tool click to adjust gas metering
  • Melonite QPQ Finish  4140 Precision machined gas block
  • Melonite finish 4140 Nexturn Swiss precision metering screw
  • Proprietary Alloy flat spring with 1400deg temper
  • Melonite finish 4140 detent plunger
  • NO tiny springs to corrode, break or seize / NO tiny ball to seize or get lost

Premium Mil-Spec AR .308 Charging Handle with Extended Latch

Premium AR .308 Mil-Spec Charging Handle with Extended Latch

Premium Mil-Spec AR .308 Charging Handle with Extended Latch is precision CNC machined from billet 7075 T-6 Aluminum and hard coat anodized to military specifications. Featuring a larger, more robust steel grasping surface designed to function with ease in in the most adverse of conditions. 

  • Enlarged grasping surface for easy operation under the most extreme of conditions
  • Steel latch construction
  • Traditional concealed latch.
  • 7075 T-6 Aluminum construction minimizes weight and receiver wear.
  • Fits all standard "DPMS Profile" AR .308 upper receivers


Aero Precision .308 / 7.62 Phosphated Bolt Carrier Group (OPTION 1)

Aero Precision's Phosphated .308 / 7.62 Bolt Carrier Group is the perfect firing mechanism for your big-bore rifle build. This high quality BCG features a mil-spec phosphate finish, is MPI/HPT and now includes a laser engraved Aero Precision "A" logo!

Option 1 Carrier Features:

  • Material: Billet carrier machined from 8620 steel and case hardened
  • Finish: Mil-spec Phosphate coating
  • Gas Key: 4130 Steel attached with Grade 8 hardware and properly staked
  • Firing Pin: Machined from 8740 steel and hard chrome coated
  • Forward Assist serrations
  • Laser engraved Aero Precision logo
  • Carrier fits DPMS compatible style AR Rifles

Option 1 Bolt Features:

  • Material: Case Hardened 9310 Steel
  • Finish: All bolt components are shot peened and phosphate coated
  • Extractor: Machined from 4340 Steel with double o-rings and double springs
  • Magnetic Particle Inspected and High Pressure Tested
  • High pressure bolt - external surfaces are CNC ground after heat treat for a precision fit and firing pin hole diameter is reduced to .070"
  • Multi-caliber bolt designed to function with .308, 7.62x51, 6.5 Creedmoor, .338 Federal and other .308 based cartridges.

Option 1 BCG Includes:

  • Bolt carrier
  • Complete bolt
  • Firing pin
  • Cam pin
  • Retaining pin

Aero Precision .308 / 7.62 Nickel Boron Bolt Carrier Group (OPTION 2)

Aero Precision's upgraded .308/7.62 FAIL ZERO Nickel Boron Coated Bolt Carrier Group is an amazingly durable, eye catching addition to your AR build. Mil- spec dimensions and coating ensure the highest quality and correct component interface.

  • Carrier is machined from 8620 steel
  • Nickel Boron coated - Coating by FAIL ZERO
  • Bolt is machined from 9310 steel
  • Custom profiled and perfectly balanced to reduce friction points operate smoothly
  • Micro Particle and High Pressure Inspected
  • Forward Assist serrations
  • Weight: 17.92oz

Option 2 Carrier and Bolt Features:

  • Carrier is machined from 8620 steel
  • FAIL ZERO Nickel Boron coated
  • Bolt is machined from 9310 steel
  • MPI
  • Forward Assist serrations
  • Weight: 17.92oz

Option 2 BCG Includes:

  • Bolt carrier
  • Complete bolt
  • Firing pin
  • Cam pin
  • Retaining pin



  • Seamless Stainless Steel Gas Tube
  • A2 "Bird Cage" Flash Hider & Crush Washer - Black Oxide Finish