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  #1  
Old 12-02-2013, 4:46 PM
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Optimus Optimus is offline
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Default Optimus Defense AR-15 80% Lower, includes $20 donation to CGF

Optimus Defense is proud to announce our new AR-15 80% lower receivers, and for every Lower sold on the Optimus Defense website, $20 will be donated to the Calguns Foundation.








Mil-spec lower on the left, Optimus Defense lower on the right.




Optimus Defense AR-15 80% Lower was designed for the tactical and precision shooter who wants a lower capable of performing to the highest level. Several months of design, manufacturing, and testing went into the development of this product to create one of the best AR-15 80% Lowers.

* Precision machined out of 7075-T651 aluminum plate by a California company that manufactures parts for major aerospace companies.
* Flared and slightly oversized magwell with a 25 degree taper angle for smooth/fast magazine loading/unloading of both mil-spec metal magazines and also polymer magazines (tend to be slightly larger).
* Front of receiver is about 1/2" longer than mil-spec to allow for a better hold when using gloves or if you have big fingers.
* Solid and oversized winter trigger guard that is compatible with most gloves.
* Reinforced around buffer tube thread.
* Exterior edges are CNC chamfered to eliminate sharp corners or edges that can snag on clothing/gear or be uncomfortable to your hands.
* Tight fit (small side of mil-spec tolerances) for pivot & take-down pin holes, upper receiver lug slots, and upper mating profile. Reduces slop and rattle of lower to upper interface.
* Vibro finished to remove sharp edges and machining marks.
* Marked: CAL. MULTI
* Compatible with mil-spec lower parts.
* Compatible with most pistol grips including grips that have a front tab, such as TangoDown grips.
* Compatible with mil-spec metal magazine and polymer magazines including Magpul Gen3 PMAGs.

The lower was also designed to be easy for the user to complete the remaining machining necessary to make it a firearm.

* Bottom of trigger guard is parallel to upper receiver mating face, which allows the lower to be leveled and clamped easily in a vice.
* Engraved visual reference location of trigger pin, hammer pin, and selector holes.
* Blue marking dye visual reference for the fire-control pocket, which allows for the pocket to be roughed out visually before final pass milling. (Blue dye can be easily removed with acetone).
* Slot for upper's rear take-down pin lug is already precision machined and chamfered for a tight fit.
* Can be painted (Cerakote is recommended), anodized, or just left in the vibro finished condition.
* Compatible with most lower drilling jigs.
* CAD model for CNC programming provided.
* Drawing for manual machining dimensions provided.
* Drawing for inspection dimensions provided.
* Completion guide.

No FFL required. This item is not a firearm. This is not a complete receiver. Machining of the trigger pin hole, hammer pin hole, safety selector hole, fire-control pocket, and trigger slot has not been completed.

For each Optimus Defense AR-15 Lower purchased though the website, Optimus Defense will donate $20 to The Calguns Foundation.

For more information on the lowers, completion information, tools and drawings please use the links below.


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Main Site:
http://optimusdefense.com/

AR-15 80% Lower Receiver
http://optimusdefense.com/products/lowers/ar-15-lower

Drawings, Completion Guide, CAD model

http://optimusdefense.com/documents

Pictures

http://optimusdefense.com/media
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  #2  
Old 12-24-2013, 7:05 PM
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3RDGEARGRNDRR 3RDGEARGRNDRR is offline
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What happened to this project? no updates?
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Old 08-05-2014, 1:14 PM
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Optimus Defense has updated our drawings and instructions for completion on our website.

Lowers are available for shipment currently if you are in need of a high quality 80% Lower.

With all Lower sales, we will donate $20 to the Calguns Foundation!


Find us on Facebook!


Main Site:
http://optimusdefense.com/

AR-15 80% Lower Receiver
http://optimusdefense.com/products/lowers/ar-15-lower

Drawings, Completion Guide, CAD model
http://optimusdefense.com/documents

Pictures
http://optimusdefense.com/media
__________________

www.optimusdefense.com | sales@optimusdefense.com | (805) 440-4145
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