MVB Industries AR-15 45ACP Magwell Adaptor

Picture of a MVB Industries AR-15 45ACP Magwell Adaptor

MVB Industries AR-15 45ACP Magwell Adaptor

MVB Industries AR-15 45ACP Magwell Adaptor is designed as a drop-in accessory for a standard AR-15 lower receiver and uses a standard H&K USC 45 caliber magazine.

Will not work with the New Frontier Armory .45ACP bolt, as it has geometry that makes it incompatible with the feed angle of H&K USC pattern magazines.

Visit MVB Industries


Stern Defense AR-15 9MM Conversion Adapter

Picture of a Stern Defense AR-15 9MM Conversion Adapter

Stern Defense AR-15 9MM Conversion Adapter

There’s no need to go with a pistol-caliber specific AR lower on your next pistol-caliber carbine build. With the Stern Defense AR-15 9mm Conversion Adapter you have the ability to utilize popular pistol magazines which you may already have a supply of.

Stern Defense make two differ models of their Conversion Adapter, one which uses Glock® magazines, and one which uses either Smith & Wesson M&P or Sig 320/250 magazines.

The Stern Defense AR-15 9mm Conversion Adapter is easily installed into any mil-spec AR-15 lower receiver within seconds and even incorporates a last-round bolt hold open feature. Each adapter is machined from aluminum and requires the use of a 9mm/.40 S&W barrel and a Glock-cut bolt.

  • Made of aircraft grade aluminum
  • Lightweight, ergonomic design
  • Installs in seconds


  • The MAG-AD9 will not function properly on mag wells with irregular contours, “3D skulls, waves, and other non mil-spec contours.” 
  • NOT recommended for non mil spec billet lowers. 
  • For the best experience, please use the MAG-AD9 with ar-15 and m16 mil-spec lower receivers.
  • The MAG-AD9 is designed to be used with ar-15 and m16 mil-spec upper receivers.
  • The MAG-AD9 system is not compatible with New Frontier, PSA Hybrid or Foxtrot Mike bolts. This is due to the lug which strips a round off of the magazine being .035 of an inch further from center-line as compared to other bolt systems. If you are looking to use these bolts with our system Stern Defense will provide bolt modification services with the purchase of a mag-ad9. More info HERE.
  • The MAG-AD9 system is not compatible with Olympic Arms Bolts, Barrels  and Uppers





I could probably devote an entire website to Aero Precision’s various AR-15 combos, specials and one of a kinds. Anyhow, this time Aero Precision is combining their fantastic threaded M4E1 AR-15 upper receiver with their Atlas S-One handguard. The AERO PRECISION ATLAS S-ONE M4E1 AR-5 THREADED ASSEMBLED UPPER system is designed to match seamlessly creating an upper so sleek it rivals the rigidity and appearance of a monolithic upper. At $199 the system comes in cheaper than many quality handguards alone.



  • M4E1 Threaded Assembled Upper Receiver
  • ATLAS S-ONE Handguard of choice
  • Handguard Mounting Hardware

ATLAS S-ONE Handguard

The ATLAS S-ONE is the newest addition to the Aero Precision Handguard lineup. Machined from 6061-T6 Aluminum, the S-ONE line of handguards are designed with size and weight in mind, providing the perfect handguard for your lightweight build. Our proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.

Available in KeyMod™ and M-LOK® profiles with 12” and 15” options (7” and 9” options coming soon).


  • Front and rear picatinny rail
  • Eliminated center of top rail for weight reduction
  • Indexing grooves in 12:00 position for positive grip control
  • Quick disconnect sling socket at the 3, 6 and 9 o’clock positions
  • Compatible with low profile gas blocks
  • 1.3” Inside diameter
  • 1.5” Outside diameter
  • Compatible with mil-spec AR15 upper receivers and barrels

M4E1 Threaded Assembled Upper Receiver

The M4E1 Threaded Assembled Upper Receiver features a new angular machined design that helps it stand apart from standard mil-spec upper receivers. This upper receiver features the same enhanced body profile as our M4E1 Enhanced Upper Receiver but is threaded to accept a standard AR15 barrel nut. It is forged from 7075-T6 Aluminum, precision machined to work with all mil-spec AR15 parts and includes the port door and forward assist pre-installed. Get the billet look without paying the billet price!

M4E1 Threaded Upper Features:

  • New enhanced forging that gives the upper receiver a “billet look”
  • New picatinny profile that blends seamlessly with our Enhanced Series Handguards
  • M4 Feedramps
  • .250 takedown pin holes
  • Laser engraved T-marks
  • Includes port door and forward assist installed





Note the current version of the PWS MOD 2 H3 Carbine Buffer features a fluted black body. The weight is also listed at 5.2 ounces versus 5.5 ounces of the original silver version pictured on this page.

The PWS MOD2 Carbine H3 Buffer is perfect for shooters who need to reduce cyclic rate or dampen recoil. The fluted design features minimal contact points within the buffer tube allowing trapped debris to easily clear. The steel buffer body is protected by a slick salt bath nitride finish for smoother cycling and resistance to corrosion.


  • Salt bath nitride finish
  • Stamped H3
  • 4140 Steel Body
  • Weight: 5.5 oz
  • Lifetime guarantee
  • H3 Heavy Carbine Buffer 
  • Weight 5.2 Oz


Pantheon Arms DOLOS AR-15 Takedown Kit

Picture of a Pantheon Arms DOLOS AR-15 Takedown Kit

Pantheon Arms DOLOS AR-15 Takedown Kit

Quick change barrel systems for AR-15’s are nothing new. I enjoy the ingenuity and engineering that goes into most them.Today’s entry is the Pantheon Arms DOLOS AR-15 Takedown Kit. The DOLOS is one of the most interesting approaches I have seen to date. Basically once an AR upper and barrel are configured for the takedown kit its a matter of pushing a button and rotating the handguard. (Watch the video at the bottom of the page to see the Pantheon DOLOS takedown kit in action.) What I like most about this AR-15 Take-down kit is it’s ability to use non proprietary handguards from quite a few manufacturers listed below.

Extra lock down collars are available to add additional barrels to an upper.

Note – Bolts should not be used with more than one barrel. Get an AR-15 bolt for each barrel you plan on using.

Pantheon Arms Dolos Take-Down System

The DOLOS Takedown Kit allows for quick separation of the handguard & barrel from the upper receiver, resulting in an extremely compact & convenient package. Kits simply attaches to your per-existing AR-15 barrel and is compatible with standard YHM free float handguards (Diamond, Tactical, etc). System works with standard AR-15 gas tubes and gas blocks. Once installed, user simply has to retract the bolt, insert the handguard, barrel & kit onto the upper receiver, turn the system 1/3 of a turn and you have an assembled upper receiver. Kit works great in conjunction with a LAW Tactical Folder for an extremely compact disassembled firearm.

The Dolos is a rapid deployment and takedown system (RDTS) for the AR15. Dolos enables discreet, concealed carry and rapid deployment of any Milspec AR15, extending the capability of any AR15 through its detachable barrel technology.

Benefits of Dolos include:

  • Discreet carry of full size rifle in small laptop bags, backpacks, and bags
  • Rapid deployment
  • Quick barrel changes
  • Multi-caliber transition
  • Hot-swap barrels
  • Easy weapon clearing and cleaning
  • Safe storage

Whether you want to put your AR15 into a backpack / messenger bag for covert carry, use multiple barrels with various calibers, or create your own genuine can of Whoop Ass, Dolos is your cost effective solution.

Why do I need Dolos?

  • Real firepower right here, right now.
    Handguns have a place – to get you to the rifle you should have had in the first place.
  • Fast deployment
    A Dolos equipped rifle can be ready to stop long distance threats and save lives in less than 10 seconds.
  • Small package
    The Dolos enables you to pack any AR into a very small package. It is easy to transport on a motorcycle or any small vehicle.

When do I need Dolos?

  • Backpacking
  • Bugout bag
  • Active shooter response
  • When you want to legally carry or transport a rifle without fear of harrassment, intimidation or arrest


  • Ensure that the lock collar is securely attached to the tri-lug and there is no freeplay in the barrel before shooting your rifle.
  • Take care to protect the gas tube when your barrel is separated from the rifle.
  • Be careful when inserting the gas tube into the upper receiver. It can and will bend bend if improperly installed.
  • Do not allow your bolt carrier group to slam home when your rifle is not fully assembled. Your charging handle will be damaged.
Pantheon Arms DOLOS AR-15 Takedown Kit Compatible Handguards

DOLOS Compatible Handguards

The rails and handguards listed below are compatible with the standard (1.850-30TPI) Dolos/Prometheus lock collar.  (Some may require modification)
 Rock River Arms
  • Rock River Arms DLX Series
  • Rock River Arms NM TRO Series
  • Rock River Arms TRO Series
  • Rock River Arms Aluminum Quad
  • Rock River Arms Aluminum Half-Quad

Yankee Hill Machine

  • YHM Diamond Series
  • YHM Smooth Series
  • YHM Todd Jarrett Competition Series
  • YHM Free Float Tubes
  • YHM Customizable Free Float Tubes
  • YHM Keymod Rails, KR7 Series Only
  • YHM M-Lok Rails, MR7 Series Only

Anderson Manufacturing

  • Anderson 12″ Diamond Free Float Kit
  • Anderson 8.75″ Slotted Free Float Tube Assembly

Unique AR’s

  • Unique ARs custom and stocked handguards (select Dolos compatible under barrel nut type before adding to cart)


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