AR15 Lower Receiver, Ambidextrous, 80%

(23 reviews) Write a Review
1.00 LBS
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1 unit
$7.15 (Fixed Shipping Cost)
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JL Billet AR-15 Ambidextrous 80% Lower

JL Billet AR-15 ambidextrous 80% lower is a unique design geared towards the serious builder. The integrated trigger guard, flared magwell, upper tensioning set screw, screw in bolt catch pin, and threaded takedown spring hole make this 80% the best on the market.  No presses, hammers or punches required! Also available as 100% serialized set. Please contact us with your FFL information.


  • CNC machined from 7075-T6 billet aluminum
  • Mil-spec component compatible
  • Ambidextrous bolt release (included)
  • Integrated trigger guard
  • Flared magwell
  • Upper tensioning set screw
  • Screw-in bolt catch pin
  • Threaded takedown spring hole
  • Includes set screws
  • Made in USA


Due to shipping regulations, we cannot ship this product to the following states. Any orders for this product from these states will be subject to restocking fees and/or possibly no refund:

California, Connecticut, Hawaii, Illinois, Maryland, Massachusetts, New Jersey, New York, Oregon, Rhode Island, Washington, Washington DC


80% Does not require an FFL. Warning: Modification of a non-firearm style casting may subject the owner to all applicable Federal, State and Local firearms laws - violation of firearms laws can result in severe criminal penalties. If your state does not allow the shipment of 80% receivers your order will not ship and you will be charged a 15% restocking fee.


23 Reviews

  • 5
    Haven't milled it yet but looks great

    Posted by George on 8th Jun 2020

    Havent milled this yet but the machining and finish looks great. I have to order jl billets jig. I was told it is not compatible with the 5tactical jig.

  • 5
    This is one awesome piece.

    Posted by Arthur W. Wiggins Jr on 18th May 2020

    I bought this lower because I wanted something special for a build I have going. I was looking for something purely based on aesthetics. This lower not only look great, it has functional features that blows away the nearest competition. Now here is an "Easter Egg" I absolutely was thrilled about, the lower's unique proprietary cuts matches up to almost perfection with AR Stoner Billet upper. I'm not kidding I'm probably going to buy 2 more. The con: You will have to modify the ambi threaded pin. The ambi cross connection receiver pin will have to be "turned" or sanded to fit in its hole. The pros out weigh the con!

  • 3
    Great concept, subpar execution

    Posted by Dave on 15th Apr 2020

    I've spent at least $450 on these lowers and haven't been able to get a single one to work properly. The lower has awesome features you won't find anywhere else, but has some issues that always keep me from actually using it. 1. I have yet to get one that has the ambi bolt release screw properly threaded. I have stripped COUNTLESS screws trying to get them to fit, they just dont. Between that and the issue below, I've broken three of these lowers so far trying to get stuck/stripped pins and screws out. 2. Another issues I've run into on every single one is the tension pin that connects the bolt releases. Every hole has been either too small or pin to large because they just get stuck in the hole and render the bolt release useless. Again, great concept. Needs more attention to detail or QC.

  • 5
    Top shelf

    Posted by Unknown on 5th Mar 2020

    Engineering excellence. You can get no better 80% lower receiver. Stands out above the rest!

  • 4
    Extremely expensive for so many finishing issues

    Posted by Unknown on 23rd Jan 2020

    I was very excited to get one of these but that was quickly tempered by the amount of finishing work needed. For example: 1. the 6/32 ambi bolt release holes were not threaded properly on (2) receivers. 2. The Ambi bolt release hole for the release pin is too small and needed reaming. 3. Select angles and curves were not finish milled and have chunks and/or rough spots instead of blending. 4. Rear takedown set screw is small, not 6/32 which is standard on other billet lowers. Overall I'd say these were rushed on the mill, someone was in too much of a hurry and didn't finish them properly. The rough edges and sharp corners are fine as it needs to be tumbled prior to coating. Keep in mind these issues are while raw and uncoated. I will more than likely have to finish tap and ream all the holes again once it's anodized or cerakoted. Decent looking design but be prepared to do a final finishing pass on all the threaded screw holes with a 6/32 tap and 1/4 reamer for the takedown pin holes. It's a lot of work for a $150 receiver. These are worth about $80 retail.

  • 5
    First billet upper

    Posted by Unknown on 2nd Jan 2017

    I have built 2 forged uppers, and wanted to give a billet a try. Very glad i did, the detail in the lower is amazing, it really complements a high end build. I would seriously recommend this to anyone who is in the market for a lower.

  • 4
    Awesome lower, The worst coating.

    Posted by Gabe G. on 30th Nov 2016

    Awesome lower. The features are great. I havent put an upper on it so I cant say anything about the ambidextrous bolt release its shorter than any of my other lowers. Assuming it has enough leverage to not be cumbersome the fitment is great. The machining is rougher around the beavertail area than ive seen on others. The black coating is TERRIBLE, it is extreamly chaulky every time I touch it it turns white, dust embeds in it and it needs to be cleaned constantly If I had to do it over I would get the raw lower and have it coated else where. I can not stand the coating at all I bead blasted it and am waiting to hear back from two different companies to see if im going to have it anodized or cerakoted. I wouldnt have a bad thing to say if it weren't for this god aweful coating.

  • 5
    Great innovations and changes

    Posted by Tom Comparet on 21st Sep 2016

    The JL Billlet 80% lower is in a class by itself. The features they put into their lower you will not find on many of the highest end ar production builds. Features like rear pivot pin tensioning adjustment, trigger reset takeup. And my favorite the ambidextrous bolt release. Not just the best 80% lower out there, the best lower out period

  • 5
    So far so good

    Posted by Gary on 25th Aug 2016

    I was very happy with how fast the shipping was especially since most lower manufacturers are out of stock. I was also really happy with the finish and it looks a little unique to most other lowers. I am using an 80% Arms Easy jig and so far, there has been no problems with fit. I was a little freaked out when I finished drilling my 3/8” holes and looked into the first two and saw little pinholes going all the way through, then I realized it’s for the allen set screws for upper tension and trigger reset. So far I’m very happy with this lower and would recommend even though a little pricy.