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GUNSMITHING SERVICES: AR-15/M-16 Extractor installation



NOTE: Gunsmithing Services are invasive and will most often (directly with tooling or indirectly with work holding) damage existing surface finishes on parts such as receivers. LRI offers a full menu of finish options for your components, please ensure you have also added an appropriate finish option to your cart if applicable.

Finish Options

Cerakote (most popular)
Parkerize Carbon Steel Action
Parkerize Carbon Steel Bolt
Glass Bead Stainless

GUNSMITHING SERVICES: AR-15/M-16 Extractor installation

  • $ 17500


The AR-15 /M-16 extractor upgrade for an M700 bolt is a very popular and almost required upgrade for a number of applications.  The factory extractor is good.  Very good right up to the point that it isn't. . .  When working with magnum bolt face cartridges, the AR-15/M-16 extractor is almost a must-have as the riveted factory piece is known to be problematic.

The AR-15/M-16 Extractor service is applicable to bolts for the following Remington actions: M700, M7, 40X, 788, 721, 722
Bergara actions: B14

The Dual Ejector modification is only applicable to the M700, M7, 40X, 721, 722

LRI starts this process a little differently.  A close inspection of factory bolts will show several intricate machined features where the factory extractor resides.  These features can have a detrimental effect on the operation of an AR-15 extractor. 

Because of this, the first thing we do is fit a bushing to the bolt face.  Our bushings are threaded directly into the nose of the bolt face.  Using state of the art machining centers fitted with 3D electronic probing allows us to achieve this delicate process. 

By knowing exactly where the part is, machining strategies can be implemented to deliver a true mechanical lock between the two parts.   Threading delivers a powerful means of mechanically locking the two parts together whereas the industry “norm” has been to rely on epoxy which is known to fail over time due to prolonged exposure to solvents, lubricants, and the shock/recoil from use.    To lock the thread in place we rely upon low temperature solder applied with magnetic induction.  Solder delivers the strongest means of bonding the two parts together permanently so that the insert can never rotate inside the nose of the bolt.

 

 

Our threading process involves no heat.  In fact, the part is submerged in flood coolant during the entire process.  The bushing we make literally threads right into the nose feature on the bolt body.  

The next phase involves facing the bushing flush with the existing nose of the bolt.  Next, the ID is bored to the requested cartridge size.*  

*With our process you are given a blank canvas to start from.  A 223 Remington bolt can be turned into a 300WSM without any concerns on reliability or function!

The bolt face is then resurfaced to ensure perpendicularity to the body axis, and edge break features are machined to enhance reliable function while also avoiding abuse on brass case rims from sharp edges.

This process also allows us to include additional features such as dual ejectors* for situations where the altered ejection angle can cause issues with large scope turrets and striker bushings* to address the issue of cratered primers.

*NOTE:  These are optional services

This concludes the first operation.  From here the part would normally be transferred to a 2nd fixture where the inletting work is done.   LRI further ushered this process into the modern age with the use of true 5 axis machining!   We are the industry leader and exclusive when it comes to custom gunmaking with this technology.  One setup, one push of the green “go” button.

The bolt body is automatically positioned to exact orientation for all of the follow-up operations.   What this means: Pinholes and pocket features unique to this service are accurately located and machined.  The risk of tolerance stacking and work holding errors are minimized tremendously because the part is physically positioned in one setup.  

The use of wireless probing provides for a very predictable and reliable means of locating the part regardless of how it is presented to the tool in the spindle.  As a std practice the face of the bolt will be surfaced slightly when installing the extractor.  This is to remove any residual solder that might be present after the bushing is installed.  Your headspace will change between .0005" and .001".  For reloaders, all that is required is a small adjustment of your sizer die setup.  For shooters using factory ammunition there is no change required.

 

We didn't stop there.  A variety of companies are making the M16 type extractor for bolt action rifles.  Within that community exists small, yet important differences.  None are better than the other however, it does require one to be "on the ball" so that the appropriate program is loaded in the machine.  This is a complication that leads to mistakes.  Our solution; manufacture our own extractors in house.

The LRI M16 extractor is compatible with both .480 and .545 bolt face cartridges.  .308 and Standard Magnum. We also offer a mini extractor for rifles chambered in 223, pictured below.

 

The extractors are machined from tool grade steel bar stock.  NO sintered metal is used! The existing extractor design is quite good so we didn't make the effort to reinvent any wheels.  That said, some small changes were made.  The claw feature now has a .005" radius to mitigate abuse to the case rim.  

The outside radius is 3D surface machined rather than contoured.  

Once complete, they are shipped to an aerospace heat treatment facility in Seattle, WA.  Seattle is noteworthy because of its heavy aerospace manufacturing presence.  The high standards of that community ensure that you receive a reliable and predictable outcome from this product.

 

 

 

 


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