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Criterion Barrels 308AR AR-10





Ballistic Advantage Nickel Boron 308AR Bolt Carrier Group

Ballistic Advantage Nickel Boron 308AR Bolt Carrier Group www.308ar.com

Ballistic Advantage Nickel Boron 308AR Bolt Carrier Group

Visit Ballistic Advantage for ordering information


  • Carrier Machined from 8620
  • .308 Bolt Machined from 9310
  • Forged Gas Key Properly Staked
  • S7 Tool Steel Extractor
  • Heavy Duty Extractor Spring and Viton O-Ring
  • Grade 8 hardware
  • Shot Peened Bolt
  • Forward Assist Serrations
  • Carrier, Gas Key, Cam Pin, Bolt, & Extractor coated inside and out with EXO NiB
  • Test Fired complete before shipping to ensure proper function

Ballistic Advantage Nickel Boron 308AR Bolt Carrier Group

AR-10 Versatile Sporting Rifle

Armalite AR-10 Versatile Sporting Rifle - www.308ar.com

Armalite AR-10 Versatile Sporting Rifle

The  AR-10 Versatile Sporting Rifle™ is a rifle designed with agility in mind and is built around features that ensure the marksman has the right tool, no matter the job. Accurate, light weight, adjustable, and balanced, the VSR is a capable contender on any field.

  • Caliber – 7.62X51 mm / .308
  • Barrel – 18” black cerakoted stainless steel
  • Rifling Twist – 1:10” RH
  • Muzzle Device – Threaded 5/8 x 24 with knurled thread protector
  • Front Sight Base -2” MIL-STD 1913 rail section at forward 12 o’clock position of hand guard
  • Handguard – 15” VSR handguard
  • StockLuth MBA-1 light weight precision adjustable for length-of-pull and comb height
  • Upper Receiver – Forged flat-top with MIL-STD 1913 rail, 7075-T6 aluminum
  • Lower Receiver – 7075-T6 aluminum (forged)
  • Safety – Ambidextrous
  • Trigger -Two-stage precision
  • Charging Handle -“Raptor” ambidextrous charging handle
  • Finish – Hard anodized aluminum, manganese phosphated steel
  • Overall Length – 37.5” (collapsed); 38.5” (extended)
  • Weight – 8.8 lbs.
  • Included – One 20-Round Magpul Pmag, Owner’s Manual
  • Warranty – Limited Lifetime Warranty

AR-10 Versatile Sporting Rifle

MDT AR-10 PRS Adjustable Butt Plate

MDT AR-10 PRS Adjustable Butt Plate www.308ar.com

MDT AR-10 PRS Adjustable Butt Plate

Recently at one of our other sites MODULARRIFLE.COM we retrofitted a Remington 700 BDL .308 with a Modular Driven Technologies MDT TAC21 Chassis. While exploring the MDT website I happened across the AR-10 PRS ADJUSTABLE BUTTPLATE (I added the term AR-10 for sake of this sites search engine presence). Up until this point I was only aware of the JP Rifles version. Installing an adjustable butt plate on a MAGPUL PRS will take an already great stock to the “be all it can be level” by allowing the shooter to dial in a perfect fit. I will be getting two.

The MDT AR-10 PRS Adjustable Butt Plate  is three-way adjustable for drop pitch and offset as well as length of pull. It further enhances the MAGPUL PRS® stock by adding the adjustability and the comfort of a soft rubber recoil pad. This is a complete module. It replaces the existing MAGPUL PRS® recoil pad, mechanism and all.

MDT AR-10 PRS Adjustable Butt Plate Features:

  • Allows for PRS stocks to be perfectly fit to your position and/or clothing
  • Adjustable vertically and for cant/rotation
  • PRS butt plate retains the LOP adjustment that comes standard with PRS stocks
  • Includes soft, rubber, recoil pad
  • Adjustments are easily accessed through the rear of the recoil pad
  • Over 3 inches of vertical adjustment
  • Easily replace existing PRS hardware
  • Aluminum construction with matte black anodizing and steel hardware with a matte black finish

MDT Magpul AR-10 PRS Adjustable Butt Plate Installation Video by Modular Driven Technologies

MDT AR-10 PRS Adjustable Butt Plate

AR Folding Stock Adapter

Law Tactical AR Folding Stock Adapter GEN 3-M www.308ar.com

Law Tactical AR Folding Stock Adapter GEN 3-M

Law Tactical AR Folding Stock Adapter GEN 3-M

The Law Tactical AR Folding Stock Adapter GEN 3 is the first and only folding stock adapter compatible with AR platform rifles. The Law Tactical Folding Stock Adapter works with direct impingement or gas piston systems and fits A2, carbine, mil-spec or commercial buffer tube and stocks. It can be used with standard bolt carrier groups including: full auto, semi auto, 5.56 to .308.

The Law Tactical AR Folding Stock Adapter GEN 3  was designed for low profile transport of AR rifles in non-permissive environments. The adapter is ideal for any situation that requires a smaller profile weapon for transport and storage. Simple one-button release folds the stock. To engage, just unfold and fire. The stock automatically locks into place, requiring no fine motor skills.

Designed, built and assembled in the USA from CNC machined, 4140 steel.

The adapter does not affect gun function when unfolded in the standard fire position. The rear portion of the adapter is built to the same specifications as a standard receiver to ensure maximum compatibility. An integrated single point sling attachment point is included.

Video here


  • Housing Weight: 8.5 oz
  • Bolt Carrier Extension: 2 oz
  • Adds 1.3 inches to length of pull
  • CNC Machined 4140 Steel
  • Low hinge reduces interference when charging weapon
  • Retaining Pin uses standard, mil-spec buffer retaining pin
  • Ionbond DLC finish
  • ADJUSTABLE hinge tension
  • 4140 HARDENED Steel Low-profile housing, locking lug and latch
  • SET SCREW Prevents adapter loosening from receiver
  • QUICK DETACH Sling attachment point
  • Install and remove without tools for easy maintenance
  • Prevent additional damage to the adapter in the folded position
  • SYMMETRICAL DESIGN Eliminates interference with buffer retaining pin
  • *Installation Tool and Flange included

Vortex Viper PST 4-16×50 FFP Rifle Scope with EBR-1 MOA PST-416F1-A

Vortex Viper PST 4-16×50 FFP Rifle Scope with EBR-1 MOA PST-416F1-A www.308ar.com

Vortex Viper PST 4-16×50 FFP Rifle Scope with EBR-1 MOA PST-416F1-A

Viper PST 4-16×50 FFP Riflescope — First Focal Plane

The Vortex Viper PST 4-16×50 FFP Rifle Scope with EBR-1 MOA PST-416F1-A boasts features associated with top-tier riflescopes, yet comes in at a street price under the $1,000 mark. Matching reticle and turret measurements allow accurate, fast dialing of shots. The one-piece 30mm tube, precision-machined from a single solid block of aircraft-grade 6061-T6 aluminum, offers ample windage and elevation adjustment. Born from an intimate understanding of riflescope design, forward-thinking engineering, and open ears to a market incredibly vocal about what it wants in a riflescope, the Viper PST series delivers the performance and features tactical shooters demand at an economical price.

Downloads Below

Vortex Viper PST 4-16×50 FFP R416F1 A 12A Reticle

Vortex Viper PST Riflescope Manual

  • Magnification 4-16 x
  • Objective Lens Diameter 50 mm
  • Eye Relief 4.0 inches
  • Field of View 27.4-7.4 feet/100 yards
  • Tube Size 30 mm
  • Turret Style Tactical
  • CRS Zero Stop
  • Adjustment Graduation 1/4 MOA
  • Travel per Rotation 12 MOA
  • Max Elevation Adjustment 75 MOA
  • Max Windage Adjustment 75 MOA
  • Parallax Setting 50 yards to Infinity
  • Length 13.7 inches
  • Weight 22.4 ounces

Optical Features

  • XD Lens Elements Extra-low dispersion (XD) glass increases resolution and color fidelity, resulting in crisp, sharp images.
  • XR Fully Multi-Coated Proprietary coatings increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces.
  • First Focal Plane Reticle Scale of reticle remains in proportion to the zoomed image. Constant subtensions allow accurate holdover and ranging at all magnifications.
  • Glass-etched Reticle Protected between two layers of glass for optimum durability and reliability.
  • Illuminated Reticle Provides precise aiming under low-light conditions.
  • Construction Features
  • Tube Size 30 mm diameter.
  • Single-Piece Tube Maximizes alignment for improved accuracy and optimum visual performance, as well as ensures strength and waterproofness.
  • Aircraft-Grade Aluminum Constructed from a solid block of aircraft-grade aluminum for strength and rigidity.
  • Waterproof O-ring seals prevent moisture, dust and debris from penetrating the riflescope for reliable performance in all environments.
  • Fogproof Argon gas purging prevents internal fogging over a wide range of temperatures.
  • Shockproof Rugged construction withstands recoil and impact.
  • Hard Anodized Finish Highly durable low-glare matte finish helps camouflage the shooter’s position.
  • ArmorTek Ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt.
  • Tactical-Style Turrets Exposed turrets provide fast, accurate and easily read elevation and windage adjustments.
  • Side Focus Adjustment located on riflescope’s left side and is easily accessible from shooting position. Provides optimal image focus and parallax removal.
  • Internal Mechanism Design Features CRS Zero Stop Customizable Rotational Stop (CRS) aids in return to zero after dialing temporary elevation correction.
  • Precision-Force Spring System Uses premium components in the erector-spring system to ensure maximum repeatability and ease of adjustment.
  • Precision-Glide Erector System Uses premium components in the zoom lens mechanism to ensure smooth magnification changes under the harshest conditions.

Convenience Features

  • MAG-View Fiber Optic Provides a highly visible reference point for the magnification setting.
  • Radius Bar Fiber optic turret rotation indicator provides a highly visible and tactile point of reference for turret rotations. US Patent 7,937,879
  • Fast Focus Eyepiece Allows quick and easy reticle focusing.

Subtension detail for the Viper PST 4-16x50 FFP riflescope with EBR-1 MOA reticle.

Subtension detail for the Viper PST 4-16×50 FFP riflescope with EBR-1 MOA reticle.

EBR-1 Reticle (MOA)

The EBR-1 (Enhanced Battle Reticle) is a hashmarked ranging reticle using MOA based subtension lines for ranging, holdover, and windage corrections. First focal plane reticle.

Vortex Viper PST 4-16×50 FFP Rifle Scope with EBR-1 MOA PST-416F1-A

Aero Precision Nickel Boron 308 AR Bolt Carrier Group

Aero Precision Nickel Boron 308 AR Bolt Carrier Group

Aero Precision Nickel Boron 308 AR Bolt Carrier Group

There are a couple simple reasons to utilize a Nickel Boron 308 AR Bolt Carrier Group in your 308AR and AR-10 rifles. The Nickel Boron Coating by FailZero is super slippery this means the bolt carrier group can operate with much less lubricant, the bolt carrier group will be easier to clean and the coating should allow the bolt carrier group to outlast the weapon under normal operating conditions. Less wear will also occur in the upper receiver. The finish also looks pretty slick.

The Aero Precision upgraded .308/7.62 Nickel Boron 308AR Bolt Carrier Group BCG is an eye catching addition to your AR build. Mil- spec dimensions and coating ensure the highest quality and correct component interface. Visit Aero Precision


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

BCG Includes:

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


Weight 17.92oz

Platform 308AR DPMS

Nickel Boron coating by Fail Zero. Learn more about Fail Zero Nickel Boron Coating Services.

Drop-in bolt and carrier group has a self-lubricating surface that eliminates the need to apply oil or grease that can attract dirt, dust, unburned powder, and carbon and lead to cycling failures. Proprietary EXO-treated Nickel Boron finish produces an exceptionally hard surface that’s 40% more wear resistant than chrome plating, with an ultra-low friction coefficient. Surface is actually harder than the substrate underneath and will not peel, flake, gall, or rub off. EXO-treated Nickel Boron finish bolt/carrier groups have been tested to function reliably without additional lubrication up to 50,000 rounds. Reduced friction also means less heat generated by metal-on-metal contact, so the gun runs cooler and parts last longer. Easy to clean, too—fouling brushes right off. Before treatment, parts are shot peened for surface uniformity and magnetic particle inspected to make sure there are no hidden flaws. Gas key is hardened to USGI specs, chrome lined to resist erosion, and comes already staked to the carrier.

Aero Precision Nickel Boron 308 AR Bolt Carrier Group