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Solid Carbide End Mill Bit



Solid Carbide End Mill bit for use with Modulus Arms Jigs. End Mill can be purchased separately or as part of complete Jig Fabrication Tool Kit.

The end mill is custom made to Modulus Arms specifications to work perfectly with our Jig. Other End mills could damage the Jig or your lower receiver.

Product Reviews

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Showing reviews 1-50 of 55 | Next

  1. Good bit

    Posted by Matthew on 16th Mar 2017

    First time using bit, on the last milling of "C" bit grabbed jumped and snapped it. I guess it was more my fault I could have been more careful. Up until then it was fantastic.

  2. End mill

    Posted by Unknown on 12th Mar 2017

    Works awesome... just a little costly considering you can get the identical mill for less at other places. Live and learn! Shipping was quick and like said the mill does do its job!

  3. Want to produce professional results.

    Posted by Ken on 7th Feb 2017

    I purchased the carbide end mill for use with my modules arms heavy duty universal jig. Due to the cutting length of the mill bit I did not have to worry about ruining my jig by touching the sides of the milling template with the bit. I was able to use the template of the jig as a guide and milled the perfect lower receiver on my first try.

  4. I understand

    Posted by clydemann on 9th Jan 2017

    Before I purchased this end mill to complete my 80% lowers I had bought several other jig kits. Now that I have the end mill offered by Modulus I can see how it it designed to not interfere with or cause possible damage the Modulus jig. I purchased about a dozen other end mills with the intent to use them to complete my lowers using a jig, I'm not at all comfortable using them with the jig from Modulus because they appear to be of a more common tool type available ay some local hardware stores.

  5. NICE

    Posted by Douglas Atkinson on 27th Dec 2016

    Great endmill, runnout is less than .0003 when chucked up in my Bridgeport drill mill. I ordered and received 2 in less than 5 days from west to east coast over Christmas weekend. That says something about this group and the USPS. Thanks guys, I'll be getting a lot more from you now that I know what to expect.

  6. Include with Jig

    Posted by JG on 13th Dec 2016

    This is a great product but should be included with the jig. The drill bits are standard, but this mill bit is a rare bird. I somehow managed to complete my first lower without this bit, but on the second lower (different router) I chewed into the trigger slot a little bit and had to mill with D.R.O. in order to get a clean trigger slot. Maybe a disclaimer before you finalize purchasing saying "hey, we have a custom bit that you will need as well."

  7. mill bit

    Posted by rockermike on 6th Dec 2016

    excellant bit used it with a competiors jig found that it worked perfect fast shipping will buy again great product!

  8. Carbide four flute end mill

    Posted by Unknown on 2nd Nov 2016

    It cut the aluminum with no trouble. I just took my time and finished the complete lower. I also found that if I became tired, I would just quit for a while and come back later. The jig worked fine, too.

  9. Great cutter

    Posted by f.juhasz@live.com on 30th Oct 2016

    Cuts like a hot knife through butter. Just keep it oiled with "Cutting Oil " not WD-40.

  10. Works as expected.

    Posted by Chuck McDaniel on 20th Oct 2016

    The online videos were very helpful with set up and milling process. The jig is built well and very accurate.

  11. end mill bit

    Posted by wayne on 11th Oct 2016

    Fast delivery,have not used it yet,quality appears to be good.

  12. End Mill Bit

    Posted by Unknown on 9th Oct 2016

    everything I get from MODULUS is #1 in my book

  13. End Mill Bit

    Posted by Howard Reitzes on 4th Sep 2016

    Works as it should and very good company to do biz with

  14. Carbide Bit

    Posted by steve on 29th Aug 2016

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

  15. The carbide bit works well

    Posted by Louis on 30th Jul 2016

    Used in a router and mill on several lowers. Stays sharp.

  16. milling bit

    Posted by Kent christensen on 27th Jul 2016

    U.s. made look good I have not used yet

  17. Watch your speed and feed

    Posted by Dave on 24th Jul 2016

    I purchased the 80% lower jig and Tool kit. Very nice jig and I believe the most accurate out there.
    I ended up buying extra end mills because of my not thinking.
    This jig is designed to use with hand tools, but since I have a mill I decided to use that with the jig. I set the speed on the mill to slow and ended up breaking the end mill when it caught as I was feeding it. After getting new end mills I used the router and everything went as it should. Lesson learned..

  18. Don't get in a hurry....

    Posted by Fred Shannon on 18th Jul 2016

    My first experience with a end mill in a router and my first 80% lower. First two passes were good. Then decided to turn up speed on router and go a little deeper to remove more material... Bad move, broke two Flutes on end mill. Received new end mill in mail then finished Lower like butter. Just taking time and follow instructions. It was an enjoyable learning experience.

  19. Good Carbide End Mill

    Posted by Nick on 26th Jun 2016

    I have purchased many end mills from various companies, including previously from Modulus Arms. Those sold by Modulus Arms are good quality and work just as well, if not better, than others purchased from different sources. There are other end mills you can buy cheaper, but it's the old story..."you get what you pay for". I have had excellent results with my 80% lower receivers using these end mills. When used properly, they produce a very nice smooth finish on the inside of the receiver. I have found that it's best to have a few spares. These are very hard carbide, and, if used improperly, or you have an accident, you can break them. This would be true of any other brand of end mill as well. I would not hesitate to buy these end mills from Modulus Arms in the future. They work exactly as they should.

  20. Easy to do and quality products.

    Posted by Jim on 13th Jun 2016

    I bought the jig, lower receiver, and the 1/4 inch drill. It was a piece of cake. When I was done using the router the lower receiver went together just like it was supposed to.

  21. Excellent quality and fit for the Heavy Duty jig.

    Posted by Unknown on 2nd May 2016

    This is a much better length than most standard mills. This works perfectly with the Heavy Duty jig. I bought two, but definitely didn't need to at least for my first lower. Looks none the worse for wear after one full lower.

  22. Mill End Bit

    Posted by Dutch Konrad on 18th Apr 2016

    This Mill End Bit is precisely machined. It, when properly chucked works extremely well in my router. I will buy it again

  23. Just used the end mill for the first time

    Posted by James Hutson on 4th Apr 2016

    The end mill works good no problem so far just going slow I'll be okay i think the jig is the best one out there!!! everyone enjoy you're build

  24. Great product

    Posted by Glen on 1st Apr 2016

    Great addition to any DIY project tool box.

  25. Great end mill

    Posted by Redbeard on 22nd Mar 2016

    Worked great even for a rookie. Would recommend this bit to anyone doing a 80%er.

  26. Chips will Fly

    Posted by EvilDeacon on 10th Mar 2016

    Perfect End Mill to the job. Get the right speed on the laminate router (about 3 on my Bosch PR20EVSK Colt Palm Grip 5.6 Amp 1-Horsepower Fixed-Base Variable-Speed Router with Edge Guide) cuts through the aluminum like a hot knife through butter.

  27. Worked great!

    Posted by Donald on 5th Mar 2016

    Ordered one mill bit to finish a couple of lowers. After finishing the second lower, noticed one of the four tips on the mill had shattered. Not sure at what point that happened as the second lower turned out better than the first :-) Ordered 2 more mills and used one of them to uneventfully to finish the third lower. Overall good experience and will continue to use them going forward!

  28. End Mill

    Posted by Unknown on 29th Feb 2016

    This end Mill works great for machining Aluminum in the AR lowers

  29. Good Bit to Have

    Posted by Paul Kimura on 20th Feb 2016

    This bit is the life blood of the build use it wisely, A few recommendation when you are milling take your time, take a break, clean out the lower after every run though. This bit is not super Bit it will break if rushed and going fast. Half moons work the best but Read everything before you start. Otherwise you will be breaking bits after the first run.

  30. jig fab. tool kit

    Posted by Thomas Dozier on 17th Feb 2016

    just received tool kit

  31. Nice to see made in USA

    Posted by Gerry on 17th Feb 2016

    End mill had a made in the USA stamp which I wanted to see. None of that cheap chinese crap.

  32. Solid Carbide End Mill

    Posted by TONY WATSON on 15th Feb 2016

    This is the only End Mill that will work with the 80% lower receiver jig. It was my first try to mill an 80% lower receiver and the carbide end mill did a great job. It was the right tool for the milling job.

  33. Works great and good price, buy 2

    Posted by Rookie on 15th Feb 2016

    I bought two of them just in case I broke one and I am glad I did. I took the router out while it was spinning(I know the instructions say not to) but I wasnt paying attention and made a mistake. It caught the side of the Jig and broke the end mill. I would get more than one just to save yourself another order just in case you mess up.

  34. Extremely Nice and Precise

    Posted by Brendan on 29th Jan 2016

    This end mill is really nice i wont mention any names but its a whole lot better then a big name 80% company out there. This end mill cuts like butter but you still should take your time the slower you go the smoother the results.

  35. As advertised.

    Posted by Tommy on 21st Jan 2016

    Did what it was supposed to do.

  36. good endmill

    Posted by Unknown on 14th Jan 2016

    Something to remember is carbide end mills are fragile. My recommendation is to not exceed 1/16 milling dept. Also putting a heavy side load on them is a qiuck way to wear of the cutting teeth.

  37. 1,000,000,000,00 times better than 80 percent arms

    Posted by Unknown on 11th Oct 2015

    I have bought both. The jig and tool kit. Both are awesome. I also have a 80 percent arms jig and tool kit. The tool kit sucks it is made out junk. My first pass with the end mill snapped off all the teeth. I have made 4 lowers with the modulus kit and the end mill finally gave out. Praise Modulus for having a quality product.

  38. high quality, low wear

    Posted by Unknown on 23rd Sep 2015

    Great piece of tooling. Glad to support US made.

  39. carbide endmill

    Posted by Unknown on 5th Sep 2015

    Does what it claims to do

  40. End Mill

    Posted by Danny on 29th May 2015

    Great end mill and works well, and is easy to use just need to take small bits and go slow so you don't break it.

  41. Uncomparible.

    Posted by Nicholas on 18th May 2015

    I missed the part that states, Solid Carbide End Mill bit is A MUST when using a Modulus Arms '15' jig! Thankfully the folks over here Modulus looked out for this rookie; helping with ALL my questions & replacement template!
    Hands down-5

  42. Carbide End Mill Bit

    Posted by Bill W on 21st Apr 2015

    This was the first time that I used a End Bit. So I was a little nervous in using it. I took my time. They said to do about 1/4 in at a time, but after this first time I went down to 2/32 of a inch. That work better for ne.

  43. Greatest jig made

    Posted by Unknown on 19th Apr 2015

    Worked like a charm great project


    Posted by SPC Nguyen on 16th Apr 2015

    Cut like butter... That's all I have to say. Great work guys!!!!!

  45. Great endmill

    Posted by Unknown on 1st Mar 2015

    Makes a great finished product.

  46. Good end mill

    Posted by reeve underwood on 24th Feb 2015

    If you are going to build a 80% lower you need one of these.. Stays nice and sharp.

  47. best bit i have seen

    Posted by Unknown on 14th Feb 2015

    ordered it and was delivered in a timely manner and was the highest quality

  48. Awesome !!!!

    Posted by Unknown on 13th Feb 2015

    This is one nice end mill , I have finished two lowers and this bit still cuts like new !

  49. Nice endmill

    Posted by CDAWG on 27th Jan 2015

    Works great! I ordered an extra one just in case I need it.

  50. Great Tool

    Posted by Mike on 24th Jan 2015

    Works great and makes finishing the lower much easier. I'm glad I got it.

Showing reviews 1-50 of 55 | Next