• Right side view of Modulus Arms AR-15 80% forged black anodized lower Receiver. 80 percent ghost receiver.
  • Angled view of the Modulus Arms AR-15  forged 7075-T6 80% lower receiver. Protect your second amendment rights.
  • Left side view of the forged AR-15 lower receiver designed to be completed with the Universal 80% AR-15 Jig

Sale! AR-15 80% Lower Receiver - Forged 7075 - Black

$79.99 $39.99
(You save $40.00)



  • Buy 1 for $39.99
  • Buy 10+ for $34.99

Forged 7075-T6 80% AR-15 Lower Receiver. The receiver is MIL-A-8625 Type III, Class 2 Hard Black Anodized. These lower receivers are forged and finish machined to high tolerance mil-specs. 80% lower receivers are not considered firearms by the ATF, we can ship to your door. No FFL required. Lowers are sold and shipped by Modulus Arms.


* All 80% Lower Receivers sold and shipped by Modulus Arms are certified by the ATF as non-firearms.



Product Reviews

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Showing reviews 1-50 of 113 | Next

  1. cerro 80 lower

    Posted by Ben R. on 13th Mar 2017

    Have not milled any of them yet but anodizing looks nice and even and dark. Has Cerro keyhole forge mark on rear trigger area on right side. Everything that is supposed to be prefinished on an 80 lower is threaded or drilled where I'd expect it to be, so no surprises there. Rear pocket is mostly done and would only have to be widened a little on either side but I've learned to not go anywhere near buffer detent area as the metal is extremely thin already on most 80%ers I've seen. Good price and fast shipping. Would have liked to have safe/fire marked as well but no biggie.

  2. More great quality lowers from Modulus!

    Posted by Anon on 22nd Feb 2017

    Loving the quality and the sale price of the forged lowers. At some point I'm going to have to stop making lowers and put my efforts into making rifles!

  3. Excellent quality

    Posted by Clay Pfeuffer on 14th Feb 2017

    I'll definitely buy more.

  4. Great 80% Lower

    Posted by Shawn Hodges on 18th Jan 2017

    My son-in-laws and I went in on some 80% lowers from a different brand, milled one and it was no good, off center from the front pin and the also the buffer tube, went through the side of two detent areas and sent the other blanks back. Modulus, milled perfect, and they are now ready to mill theirs 80% lowers from Modulus after seeing the quality and finish of the product.

  5. great quality

    Posted by Sonny Lane on 17th Dec 2016

    This is my first 80% lower, however I have owned many other stripped lowers. I am impressed with the quality and machining of this lower. There are zero machining marks. Compared to my friends AR Stoner 80% lower this one looks to be much higher quality. I will continue to purchase these 80% lowers in the future.

  6. Good 80% lower

    Posted by Unknown on 2nd Nov 2016

    I just machined my first 80% lower and it came out perfect using The Modulus Arms Universal Jig. The hardest part was drilling all the relief holes (3/8"), but once the router milling started, it was easier.

  7. Very highest quality "blank."

    Posted by DrDoug on 30th Oct 2016

    Very nice 80% lower - Cerro Forge keyhole mark on the trigger guard. "20%" machining that was performed is very good. Nice anodized coating, too.

  8. Excellent Receiver

    Posted by Satisfied Customer on 29th Sep 2016

    Well spec'd and very nice finish. Bought at a discount in combination with the HD jig. Very pleased with the end result. Would buy more.

  9. Great receiver!

    Posted by Phil on 19th Sep 2016

    This is my second receiver from Modulus. The first one was so easy to finish and worked so well on my DMR build, I had to get another for a 300 Blackout build. For a first time builder like me, I think the Modulus Arms system is the best. The first receiver took me about two hours to complete using a drill press and a Bosch router. I think the next one will take a little more than an hour, now that I have some experience. The only surprise I had was the LARGE amount of metal shavings from such a small amount of material to be removed. Have your shop vacuum ready! Great product that I will definitely buy again!

  10. Perfect deal

    Posted by Unknown on 25th Aug 2016

    Perfect finish and super fast shipping. Couldn't them in stock anywhere else.

  11. ModulusArms = The # 80% lowers! Period!

    Posted by Michal Keesee on 22nd Aug 2016

    I have zero wobble when matched to my mil. Spec. uppers , Super Fast Shipping! Store to door was 6 business days others can be 4 to 6 weeks (ouch!) I've finale found #1 Thank You ModulusArms.com !!

  12. 2nd purchase

    Posted by Ken on 15th Aug 2016

    Very good product I purchase my lowers from this company and have been very pleased with their products.

  13. 80% lower receiver

    Posted by Marc Gonzalez on 13th Aug 2016

    The shipping was quick, it was package securely, wrapped in foam.

  14. High End AR15 Receiver

    Posted by Ray Hege on 9th Aug 2016

    I own several AR type Rifles and Carbines from the cheaper starter to a couple High End preBan Colt's and Bushmasters. these Lowers are exactly like the ones on my High End AR's the fit and finish are perfect worth every penny

  15. Very nice!

    Posted by hessler on 3rd Aug 2016

    The receiver arrived promptly and was well packaged. This is my first 80% lower receiver. It is flawless, both in form and finish. I was going to toss it in a drawer for future, but I may just reconsider, buy a jig and get on with it.

  16. The ONLY choice for the serious minded.

    Posted by Michael M. Bystrzycki, Sr. on 17th Jul 2016

    No fluff, no puff, no excuses; just a well made 80% lower for the serious minded builder that values function over aesthetics.
    If your lower is built with quality components from different manufacturers, and you enjoy ensuring a custom fit & flawless dependability, then Modulus Arms is the name you need to know.

  17. good quality

    Posted by Beau on 7th Jul 2016

    I purchased a couple 80% lowers and received them in a timely manner. Tracking through USPS was not accurate. However, I am pleased with the lowers and how they were shipped. The quality is a good quality aluminum with a nice finish. The price of the lowers were the lowest I found that were in stock. I have completed 1 lower and I am pleased with the final product. I will purchase more from Modulusarms.com.

  18. AR-15 80% LOWER RECEIVER - FORGED 7075 - BLACK

    Posted by Richard Mitchell on 4th Jul 2016

    I have purchased several of these, and they are very high-quality and consistent. Pack packaging is very good and productive. I would recommend these to anyone competing completing 80% lowers. Packaging is very good and protective. I would recommend these to anyone completing 80% lowers.

  19. Pretty good.

    Posted by Brandon on 28th Jun 2016

    Standard lower. Great fit and finish.

  20. good lower

    Posted by Anthony Poole on 27th Jun 2016

    Overall this was a good lower reciever. I milled it out today

  21. great gun part

    Posted by Unknown on 27th Jun 2016

    These are very fine parts. The jig works perfect This is the third one I have done.

  22. Easy and very well made!

    Posted by M.R.Hamilton on 26th Jun 2016

    We have built several great guns with this lower with zero problems with fit and finish!

  23. quality 80% lowers

    Posted by Tommy McLaughlin on 25th Jun 2016

    Received my lowers and they were packaged well and wraped in foam. The anodizing looked good and consistent with no casting or machinery flaws or burrs. Definantly will but more.

  24. Lowers

    Posted by Mark on 22nd Jun 2016

    Lowers were shipped and received quickly and in good condition!

  25. Works Great

    Posted by Craig on 20th Jun 2016

    Brand new to working with 80% lowers. I ordered three of these along with the Heavy duty jig during the memorial day sale. All three have been completed and look fantastic! would highly recommend to anybody interested in working with lowers. Great Product!

  26. Contnued satisfaction.

    Posted by Unknown on 19th Jun 2016

    I couldn't pass up the great memorial day deal on another 80% lower. I'm getting steadily more comfortable machining these.

  27. my review of Modulus Arms

    Posted by Michael Goodman on 15th Jun 2016

    Stellar customer service and support. The jig and lower receivers are top notch and excellently finished.
    Packaging and shipping are done in a timely manner and carefully done to insure pieces are not damaged.
    Two thumbs up for Modulus!

  28. Best Deals Around

    Posted by Frank M Nua on 14th Jun 2016

    Modulus Arms is always my first stop. they consistently have the lowest prices on the best products. 80% non-Blem Cerro Forged Lowers for under $60. . .what. this is the place to check for all your future 80% mill builds.

  29. great product.

    Posted by Unknown on 11th Jun 2016

    Excelent. Milled out two recievers this week. Both are jewels. 7075 is a bit more time consuming to mill out (about 3 hours) but worth the peace of mind having a higher strength aluminum.

  30. Solid and Clean

    Posted by Sean on 10th Jun 2016

    This is an awesome lower, the finish is flawless and the attention to detail is better than most. I would put this up against much more expensive lowers and would buy again. My only regret is that I did not by more.

  31. Great looking

    Posted by jacob irwin on 7th Jun 2016

    Bought the lower and upper receivers from these guys and they came really quick. And we're packaged very well. I will be buying again

  32. Excellent quality

    Posted by Unknown on 5th Jun 2016

    These lowers are excellent. I've done 6 so far. This last one is going to become a 300blackout. Jig is also excellent. I've used lowers from 3 different manufacturers and the jig is truly universal.

  33. satisified!

    Posted by Armir Perez on 5th Jun 2016

    Looks solid, no problems seen. Can't wait to put this together for custom projects. Will buy more in the future

  34. Impressed

    Posted by Brian on 4th Jun 2016

    The online ordering process was quick and painless. Shipping was quick. Everything was packed well and arrived flawless. I cant wait to get building.

  35. Very Nice

    Posted by Derrel Carter on 29th May 2016

    Really like the fit and finish on these units. ONLY option that I would like to have had available is "Fire & Safe" engraved already? Otherwise Good to Go!

  36. great

    Posted by Troy Beaver on 28th May 2016

    These are great looking the price is hard to beat.

  37. Awesome

    Posted by Unknown on 23rd May 2016

    I got mine the other day and everything looks great. All dimensions I can check are in spec and all components fit properly. This is 100% mil-spec as far as I can tell.

  38. good quality lower

    Posted by Chris B on 19th May 2016

    finally got around to milling my 80 so i figured i do short review. Nice solid lower , annodizing was on point , no scratches or knicks anywhere. Paired up with the modulus heavy duty jig and the drill guide , the milling process went smooth as could be for my first time. once i got the LPK installed and attached to an upper, function check was good to go, cant wait to take it to the range and get it zeroed in.

  39. Perfect

    Posted by David on 6th May 2016

    Best product you can buy.

  40. Anodized 80% lower

    Posted by Carey Arms Works on 20th Apr 2016

    A friend was researching getting his own lower and found this sale item. I have experience with AR 15 lowers so I looked at them. I agreed with him that it looked like a good deal and ordered on.

  41. Good lower.

    Posted by Unknown on 16th Apr 2016

    Recently finished one of these for a build. Anodizing looks nice, matched my Aero upper almost perfectly and fits nice and tight.

  42. Good as always

    Posted by Unknown on 3rd Apr 2016

    I've bought 3 of these now, and as everytime they're great lowers. Free of any dings dents scratches etc. The anodizing finish is a spot on match for few PSA kits I have. Shipping is very fast within a few days for me. I will continue to be a Modulus Arms customer for these lowers.

  43. Exceptional !

    Posted by Unknown on 3rd Apr 2016

    Impressive at first Glance . Mates perfectly with a Bravo and RRA upper. Couldn't ask for more.

  44. not bad

    Posted by Unknown on 29th Mar 2016

    Fast shipping and not a bad product

  45. Great product

    Posted by Unknown on 27th Mar 2016

    Very good quality. Fast shipping and great product, will buy again.

  46. 80% lower reciever black

    Posted by Unknown on 16th Mar 2016

    Great quality. Finish was flawless.

  47. Lower

    Posted by Tim Stone on 9th Mar 2016

    I am a VERY happy buyer. The lower was clean and easy to mill, all by my self. This is a great product.

  48. looking stellar

    Posted by Unknown on 8th Mar 2016

    Great Product. Flawless finish.

  49. fast shipping

    Posted by Unknown on 28th Feb 2016

    Overall quality is good. had a small ding near the mag realease. Finish matched my PSA upper kit perfectly would buy again.

  50. happy customer

    Posted by jimmy on 8th Feb 2016

    Very fast shipping, i was plesantly surprised. I will order more.

Showing reviews 1-50 of 113 | Next