AR 15 jig for 80% receiver – AR PRO Intermediate includes select-fire (full auto ) capability

$235.00

This compact AR 15 jig assembly is designed specifically for 80% mil. spec. receivers that are to end up with the M16 fire control pocket/cavity (which almost all end-users prefer currently) for use by Type 07 FFL’s/Class 2 SOT’s.

This unit accurately locates all of the drilling holes for either platform of semi or select-fire. The entire AR 80% completion process may be easily done with only a drill press and Dremel tool for those who do not have access to a milling machine.

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AR-15 jig for 80% receiver AR PRO Intermediate including full auto

 

This compact AR 15 jig assembly is designed primarily for 80% mil. spec. receivers that are to end up with the M16 fire control pocket/cavity (which almost all end-users prefer currently) typically for use by Type 07 FFL’s/Class 2 SOT’s in their sales. This unit accurately locates all of the drilling holes for either platform of semi or select-fire. The entire AR 80% completion process may be easily done with only a drill press and Dremel tool for those who do not have access to a milling machine (which is much easier and faster). This unit is also popular with Law Enforcement armorers in that their current semi-auto carbines already in inventory can be easily reconfigured to select-fire at their premises and then their tax-exempt Form 1 is filed. That way there is no longer any wait for acquisition because of a BATF approval of an LE transfer, nor is there the loss of control by having to ship the firearm off-site.

Due to demand by other Class II manufacturers, This kit only has (2) M16-only top plates (1 milling and 1 drilling). This way Class II’s can directly make their M16 version rather than make the AR first and then convert to select-fire using conversion templates. Another insert (with an additional drilling bushing) has been added for the drilling of the trigger through the bottom (80% mil.spec. forgings only-without permanent trigger guard). Non-Class II end-users may use this jig for their AR rifles but they cannot drill the auto-sear holes without violating NFA rules.

AR PRO Full Jig Kit for AR-15 80% Forgings
AR PRO Full Jig Kit for AR-15 80% Forgings

Details of latest revision jig parts 8/20/23

New right sideplate outer indicator of inner fire control pocket
New left sideplate outer indicator of inner fire control pocket
New M16 milling top plate with self-contained alignment tabs
New M16 drilling top plate with self-contained alignment tabs

 

The video below depicts how the drilling top is utilized when evacuating the fire control pocket with only a drill press (and not a mill):

The AR PRO is a complete jig/final assembly system and has many options which are not included here. This setup is a ‘no frills’ lower cost variant of the AR PRO with only the basic hardware required to machine out a fully operational select-fire rifle.

Above YouTube shows older version top plates and older version sideplates for the AR as well as AK upgrades

 

As with my other jig offerings there is also a very detailed jig usage instructions with color 3D cutaway CAD drawings which include all listed (.001”) measurements which are sent via email upon shipping confirmation after the sale.

While most other jigs out in the marketplace take full advantage of the “precision slop” of an AR-15, my jigs have to be precise due to the lineup of hammer to bolt and autosear to bolt carrier trip point.  AR’s only need the hammer to be re-cocked each time, whereas M-16’s have to be exact for proper release/catch of the hammer in relation to the locking of the bolt assembly into the barrel extension.

Because of both the stringent M16 autosear requirements as well as an increase in lesser quality (out of spec.) 80% sets sold on the internet, I had to design a “receiver tester”.  This testing template will indicate three things:

  1. Proper width of the outer walls of the fire control area
  2. The trigger slot as well as the rest of the interior cavity are centered and not skewed in relation to the magazine well
  3. The rear ward tab indicates if too much material has been removed from the top plane of the lower receiver (affects autosear)
AR-15 80% testing template (overall width, alignment and depth) of lower receiver

The photo above shows this new reusable testing piece which is included with this jig.  Proper width and centering all of the parts in line with the action of the gun are the basic requirements.  However the manufacturer’s removal of too much off of the top plane of the lower receiver can negate the use of these receivers as select-fire units, because the autosear holes would be too close and potentially structurally fail.  If you get a failure, the gun will have to remain semi, trying to re-weld and re-drill will only get you back to the original bad starting point.

(3) AR-15 80% lower receivers, (2) on the left are good, right one is bad; for a clearer (larger) view, look at this photo in the photo gallery at the top of this page

Something to remember about the 80% lower receiver market, I have had numerous customer experiences dealing with lesser quality products from both brand name rifle manufacturers as well as machining shops, you need to check their products before you even start work.  When you find a flawed receiver, try and swap it for another or get your money back.  Like my grandfather used to say, “You can’t polish a turd, no matter how much you try, it will always be just a turd”.

For that matter, do you actually think that big rifle manufacturers use only their best receivers to sell to the 80% market?  If they did, that would be an extremely poor business model.  I assure you, those less than perfect are sold as 80% units on the internet and the really bad ones only end up in the ‘trash can’.  Keep that in mind when you find those deeply discounted units…..you always get what you pay for.

Hardened steel drilling bushings have been inserted into the sideplates for the hammer pin, trigger pin, auto-sear, as well as the fire select switch and trigger for long-term reuse.

In addition, while the other Class II select-fire conversion jigs only attempt to layout just one auto-sear hole; these additional features are also incorporated into this kit to accurately mark both holes on both sides as well as include the top (select-fire) milling template along with denoting the 3 unique depths of the auto-fire control pocket on the jig’s sides. No other jig kit has anything remotely similar to these features.

Also included in these instructions are the little known and rarely disclosed armorers’ techniques regarding the bolt/auto-sear release “timing” measurements which are done with a feeler gauge through the magazine well.

Perhaps the easiest would be for you to refer to the AR PRO description and notice what this jig doesn’t have. The accuracy of my entire jig line is the same for all shapes and holes required.

If in doubt about the quality of my entire jig lineup, read this Reddit link about the AK PRO (click here)

This fixture may be lawfully owned by anyone, but ALL NFA RULES APPLY regarding the use of some of the features incorporated into this product. You (the purchaser) are solely responsible for how this item is used and I (the seller) shall not be held accountable for any misuse of this drilling/milling jig by you (the purchaser), whether Class II or not.

Currently I also have a complete 80% AR jig/assembly system, an AR conversion jig, an 80% AR receiver tester, as well as an AK-47/74 Class II jig for the 80% pre-bent and heat treated receivers, an AK scope mount template, an H&K flat template, a semi to select fire jig for existing HK rifles, and a semi to select-fire conversion jig for the SEF trigger pack which does not corrupt a semi auto receiver, a Class II AK-47/74 / Galil conversion jig for semi to full conversion, a Galil 80% jig, a locked slide conversion (for suppressor use) for the GSG 1911-22 and a Ruger 10-22 80% jig (also with locked bolt drill-in locator) on-line now.

Keep in mind that I am an 07 FFL with a Class II SOT (suppressor and machinegun manufacturer) and essentially all other internet vendors of items similar in function/use to my kits are neither licensed FFL’s nor SOT’s.

A shout out to the (4) companies renting autos (made using my AK, AR, and HK-SEF conversion jigs) on the firing line at O.F.A.S.T.S. last summer.  I appreciate all of the accolades, but I sort of wished that you would have stayed at my table a little longer, giving the all-important satisfied customer speeches to all of the passersby.

Also a big thank you to Mike @ O.F.A.S.T.S. for getting me those cut IMI Galil pieces that I used to design my new Galil jig.

It is important to remember that to fully comply with ATF’s “home made” rulings, make certain that whatever manufacturer’s 80% lower you decide to start with has not had any type of prior work done (even including work done by a friend) in the fire control pocket area (which includes any kind of top, bottom, or side holes, marked holes, or even depressions/grooves). If it has, it would no longer meet the 80% criteria and therefore would already be classified by ATF as a live firearm and your work on it (unless you are already a Class II manufacturer) would immediately put you (the purchaser) at risk for violating the Gun Control Act.

Jig/template assemblies and supporting parts of the jigs in the photos are included, however (trigger groups or trigger boxes and/or trigger pack assemblies, firearms, receivers, parts, tools, milling bits, and/or drill bits are not included).

These items are usually shipped by the next business day.  My products are made in America, by Americans, for Americans.

This jig along with all of the others that I design, manufacture, and sell, was “over-engineered” for those who value their time and money. Since I have attempted to foresee and surmount any and all possible errors which could happen during your construction(s), the possibility of your making mistakes approaches zero.

Nothing is more disappointing than a mishap that requires a replacement receiver or part. Not only is there a monetary loss, but there is also the frustration factor due to the lost time in the work thus far, perhaps a broken tool or fixture, then there is the wait involved for the replacements to arrive from the other supplier via shipping. Now what should have been reasonably fun has become work. That being said, if you are unsure of your milling capabilities, let me remind you that this jig is made of plastic and is NOT designed to be a machining tool stop. If you hit plastic with a high speed steel mill bit at 2,000RPM, the plastic will always shatter, which means pilot error.

In my efforts to make this the finest, most accurate jig available, I continually re-examine my product line and I also listen to suggestions by my customer base. That being said, there is always the possibility that an update/revision has been incorporated and the product may have changed in either shape or color from what has been pictured. Regardless, the functionality for which the jig was designed for will ALWAYS be enhanced with each revision.

To download instructions for the AR PRO in MS Word, click here

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Shipping is included.  Sales outside of the United States have to be transacted via telephone with credit card information exchanged.  Extra shipping and insurance fees as well as paperwork filings are involved.

After purchasing my jig, your credit card statement will show the following as the vendor:

ESP  or  EXTRA SENSORY PROTECTION 913-341-8564 KS

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