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Jig Fabrication Tool Kit



Jig fabrication Tool Kit for the Modulus Arms AR-15 and AR-308 / AR-10 Universal Jigs includes all of the necessary drill bits, drill stop, and end mill bit for fabricating your lower receiver with the Modulus Arms AR-15 or AR-308 / AR-10 jigs. Solid Carbide End Mill is custom designed to work with the Modulus Arms Jigs.


Kit Includes:

(1) Solid Carbide End Mill Bit

(1) 3/8" Drill Stop

(1) 5/32" Drill Bit

(1) 19/64" Drill Bit

(1) 3/8" Drill Bit


 * Actual parts contained in this kit may vary.


Product Reviews

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Showing reviews 1-50 of 83 | Next

  1. Great to have 5 Star Review

    Posted by on 18th Oct 2017

    I got a spare jig fab kit in case the first set started wearing or breaking. The only piece I have used is the 3/8 bit and collar. That is only because I had it and I set one collar at the B depth and one at the C just to save a little time and effort or prevent setting a wrong depth. I am thinking about doing this in a more permanent way actually. I may never have to use the rest for this purpose but that's OK since they are just quality bits that can be used for other projects.

  2. Quality material 5 Star Review

    Posted by on 26th Feb 2017

    All the bits are quality. Would definitely buy these bits again.

  3. good kit... 5 Star Review

    Posted by on 20th Feb 2017

    good quality sharp bits and end mill. Only small issue I had was with 3/8" collar set screw. It was a little soft so after a few turns and tighten it required some coaxing.
    may need to replace soon.
    Overall a good and convenient kit.

  4. Nice set of tools 5 Star Review

    Posted by on 9th Jan 2017

    Got this set as a spare set to have if one breaks in the middle of a job

  5. Makes the whole project easier 5 Star Review

    Posted by on 14th Dec 2016

    I purchased this jig fabrication tool kit to use with the Heavy Duty universal AR-15 lower jig so I didn't have to find a drill stop sleeve and try to purchase an end mill bit that was the right length to use. My standard end mills are much shorter and are for steel. These tools made completing the machining for my 80% lower more worry free and easy to do.

  6. Built from steel to last! 5 Star Review

    Posted by on 21st Nov 2016

    I have worked as a machinist some years ago and from that have an idea how good tooling should made . The drill guides need to be steel if the tool is going to hold tolerence and alignment. This tool is built to last, don't look any farther, this is the jig that is worth the money.

  7. perfect jig for the DIY geeks. 5 Star Review

    Posted by on 29th Oct 2016

    Great product, fast shipping, does exactly what it is supposed to do. No fuss, no muss.

  8. It's all there 5 Star Review

    Posted by on 29th Oct 2016

    I had all the tools needed to complete the 80% with no problem.

  9. tools needed 5 Star Review

    Posted by on 11th Oct 2016

    Seems to contain all the tools needed(except drill press)

  10. great!! 5 Star Review

    Posted by on 1st Oct 2016

    Haven't used it yet! But maybe after Christmas

  11. Quality tool kit 5 Star Review

    Posted by on 29th Sep 2016

    The tools got the job done and did an excellent job doing it. They turned out an excellent end result for my first try.

  12. No more paperweights! 5 Star Review

    Posted by on 17th Sep 2016

    I've learned a long time ago that the cheap product will cost you the most. Based on that knowledge my first AR15 jig is a modulus arms one. After reading so many reviews about guys having 3-4 paperweight jigs I went with Modulus arms. Trust me the quality of the product will simply blow your mind!! Bite the bullet and pay for the heavy duty one, you will not regret it.

  13. Very well made. close tolerances 5 Star Review

    Posted by on 12th Sep 2016

    Haven't used it yet but the fits of the different parts are very good and it is a good piece of machine work.

  14. The best I have found 5 Star Review

    Posted by on 2nd Sep 2016

    Received my ar15 jig in the mail, very well built and looks great. Have not had a chance to use it yet, the lower will be another few weeks till I get it. Looks like everything should work great.

  15. perfect jig for the DIY geeks. 5 Star Review

    Posted by on 29th Aug 2016

    Totally impressed with the jig and the quality of the product. Couldn't be any happier with the whole setup. You will not be disappointed.

  16. Jig Tool Kit 5 Star Review

    Posted by on 29th Aug 2016

    Works well in my router, cannot wait to build more 80% lowers....

  17. Great tool kit 5 Star Review

    Posted by on 24th Aug 2016

    The drill bits are excellent! They work better than the coated drill bits that I bought for myself. The 1/4" mill bit worked well in my full size router. I like the drill stop but make sure you check it FREQUENTLY! Mine came loose and I drilled a couple of holes a little to deep as a result.

  18. Best Kit on Market 5 Star Review

    Posted by on 22nd Aug 2016

    You can purchase a cheaper kit but why mess with Aluminum with steel bushings when you can have a whole steel kit?

  19. Very Convenient 5 Star Review

    Posted by on 15th Aug 2016

    Unless you have a connection in the tooling world, this is the way to go. If you Once you factor in your time sourcing the parts, this comes out being the best deal given the cost of a carbide endmill. Granted, I would have preferred a HSS endmill for this application, but carbide works well. Just remember how brittle it is, and use cutting fluid and blow or vacuum your chips up at avery pass. Also, you may find better results running the endmill a bit slower if you have variable speed control. Overall, the quality is high. If you do not abuse these and use them exclusively on aluminum lowers, they will last you a very, very long time.

  20. Great products! 5 Star Review

    Posted by on 12th Aug 2016

    These bits did the job flawlessly. Insanely sharp from beginning to end. Definitely recommend!

  21. Great drill bits! 5 Star Review

    Posted by on 5th Aug 2016

    I bought this kit after the 3/8 drill bit from my local hardware store performed poorly. The 3/8 Drill Bit in this kit work GREAT! The bits all worked well and made it easy to complete my project.

  22. it really is tge best out there 5 Star Review

    Posted by on 31st Jul 2016

    Drill and mill plates are very heavy duty..I seen some other brands of jigs but this 1 is a little more money but u get what u pay for that's for sure

  23. Pure quality! 5 Star Review

    Posted by on 17th Jul 2016

    Received the kit in just a couple days. Very impressed sure it will get the job done right.

  24. Great as a kit 4 Star Review

    Posted by on 17th Jul 2016

    I buy one of these kits each time I buy a lower. I'm sure they're capable of doing two or more lowers, but at their minimal cost, I just get a set with each lower. This ensures I get nearly identical results from each lower while minimizing potential bit wobble & jig damage.

  25. Great product!! 5 Star Review

    Posted by on 14th Jul 2016

    What can one say about drill bits. They worked great.

  26. Product Received Faster Than Expected 5 Star Review

    Posted by on 11th Jun 2016

    I was very impressed with how quickly this product came in. The kit looks like it will definitely get the job done.

  27. These will work. 5 Star Review

    Posted by on 30th May 2016

    Drills are nice, end mill is very high quality but the stop collar is the set screw type that can, if mounted improperly 'could' distort the edge of the drill flute. I would rather see the type that 'squeeze' clamps onto the drill.

  28. Meets expectations 4 Star Review

    Posted by on 16th May 2016

    The drill bits are working well, and really helped as the bit for the trigger hole is an unusual size.

  29. What a difference! 5 Star Review

    Posted by on 2nd May 2016

    I have done the polymer lowers, and aluminum lowers with both the included jig (polymer) and a standard sandwich aluminum jig. This jig made the job look so clean that the only way to tell it wasn't a 100% lower to begin with was the silver color where it was cut. The upper fit perfectly (not sloppy like the sandwich jig) and the trigger slot was dead centered. I used a Ryobi router from Home Depot and it worked fine (cheapest router they had).

  30. Everything needed and lasting. 5 Star Review

    Posted by on 13th Apr 2016

    All bits and end mils stay sharp when following the suggested instructions. Especially when using the lubricant and tool cooling fluids. Using the right rpm for the tools makes it very easy.

  31. All thumps up!!! 5 Star Review

    Posted by on 5th Apr 2016

    The tools are of very high quality. And perform flawlessly.

  32. Good quality bits. 5 Star Review

    Posted by on 31st Mar 2016

    This kit works great, the bits cut fast and clean with just a little wd-40.

  33. Great Tools 5 Star Review

    Posted by on 9th Mar 2016

    I ordered this as a kit. The instructions were simple and easy to follow.

  34. fast and proper. 4 Star Review

    Posted by on 8th Mar 2016

    the tools kit came in about 2 days. tools are sharp and appear to be high quality. the only way I could do better would be to spec out coatings, and the price would not be near as good as these.

  35. Quality tools 5 Star Review

    Posted by on 16th Feb 2016

    The tools worked well with the JIg kit.

  36. Best jig I have found! 5 Star Review

    Posted by on 14th Feb 2016

    This jig makes completing an 80% lower so much easier, other jigs were very hard to use and instructions were vague. Modulus has set the standard with this new heavy duty jig.

  37. Good kit for doing lowers 4 Star Review

    Posted by on 5th Feb 2016

    I had the drill bits but I got the kit just because it seemed worth it instead of just the end mill. End mill is top notch. The drill bits are normal and nothing special or garbage.

  38. excellent 5 Star Review

    Posted by on 2nd Feb 2016

    everything screwed together perfect. . nice piece

  39. Works very well 5 Star Review

    Posted by on 1st Feb 2016

    26 Jan 16 I was really apprehensive to start this project , but this jig and fab kit work very well . I have never used an end mill but the combo of the mill and a router WOW I know better but for a moment I thought I was a machinist . Trying not to rush I took a break and will finish 2 Feb 16 and off to Cerakote . This process is really fun , get some good lighting ,sound was not bad at all had a radio on through out and really enjoyed this project .Thanks for producing this kit and making it available .

  40. tool kit review 4 Star Review

    Posted by on 1st Feb 2016

    I bought this tool kit for use with the Modulus jig. I wanted to make sure I had an end mill that would not damage the jig. It turns out that the end mill essentially identical to the tool kit sold by a competitor. This kit works very well. The only reason I gave it 4 stars instead of 5 is that the competitors tool kit comes in a small plastic case that holds all of the pieces together. The quality of the Modulus tool kit is great but now I need to find some kind of small box to store it in. If you do not have a tool kit for use with a router type jig then this one is great.

  41. drill bits & mill 5 Star Review

    Posted by on 31st Jan 2016

    I got this just for the mill. You can never have too many drillbits and the bit stopper came in handy. The mill was very smooth and nice. Works great w/ jig

  42. Exactly as promised 5 Star Review

    Posted by on 28th Jan 2016

    I'm no machinist so I don't know what makes a good drill bit or end mill. The drill bits worked as expected. It was my first time using an end mill and it didn't break.

  43. Fabrication Tool Kit 5 Star Review

    Posted by on 21st Jan 2016

    End mill is an exceptional value and worth the price of the kit.

  44. Anticipation!! 5 Star Review

    Posted by on 20th Jan 2016

    Well, the cutting tools have arrived and they seem top-notch. Now, if I could just get the heavy-duty jig to use them with, that would be nice. I look forward to its arrival and the completion of this project!

  45. Modulus Arms jig review 5 Star Review

    Posted by on 17th Jan 2016

    follow the instructions closely and take your time with the milling process. my first end product is a tight fit and all pins aligned without the need to modify holes.

  46. Overall Pretty Good 4 Star Review

    Posted by on 14th Jan 2016

    Everything worked as advertised, but the end mill broke halfway through. Was able to smooth out the rough end by carefully working it on my grinder and finished the receiver. I'll have to get a new end mill before my next project, so that part sucks.

  47. Jig Works 5 Star Review

    Posted by on 24th Dec 2015

    Go slow with the end mill. Take very small steps and use cutting oil. Also run a vacuum cleaner, duct taped to the side and then a brush and/or air compressor to blow out all the debris after each step of metal removal. The trick is don't try removing too much metal in one try with the end mill. Go very slow and you are fine. Also after each step recheck your end mill length and tighten it in the router. Order an extra end mill. No one is perfect :D

  48. Good Mill, OK Bits 5 Star Review

    Posted by on 14th Dec 2015

    End Mill is really nice. Drill bits are just average.

  49. just received the product 5 Star Review

    Posted by on 24th Nov 2015

    Looks like it's good quality material.

  50. Good quality drill bits 4 Star Review

    Posted by on 20th Sep 2015

    Surprised the drill bits weren't 2 cent pieces of crap. They were actually decent quality.

Showing reviews 1-50 of 83 | Next