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(23 customer reviews)

Original price was: $110.00.Current price is: $105.00.

stick with an ultra-light but capable polymer .308 lower-and-jig combo from Polymer80 and get everything you need in a single order for a great price!


After two years of planning, design, engineering, and testing, we’re proud to introduce the industry’s first reinforced polymer receiver designed for the DPMS styled .308 in an 80% format. 308 80 percent lower jig.

Our AR-10 jigs are designed with first-time builders in mind, so we have built-in safeguards to prevent common errors, drill bit depth guides, a manual, and tutorial videos to make the process even easier! With instructions and basic tools in hand, you can confidently complete your AR-10s lower in around one to two hours.

.308 80% Lower Receiver & Jig

Our .308 80% jigs provide you with the tools you need to complete that AR-10 clone or 700-yard bench rifle receiver. Choose the rugged Elite Builder Jig, fabricated from hardened steel with drill bushings, and confidently cut and drill your receiver for your lower parts kit, upper, and buffer system in a single afternoon.

Jig & Receiver Compatibility

These jigs last for long! One metal AR-10 jig can easily complete twenty or lowers without having to replace any plates from wear-and-tear. Want to spend as little as possible on your 80 percent lower .308 build? The polymer jig-and-lower combo kits come with both an AR-10 polymer receiver blank, the jig, and the bits!

Also, each of our stand-alone .308 jigs is made compatible with the popular DPMS LR-308 (gen 1)-type .308 80% lower receiver. These full-size receivers closely mimic the size and shape of the original ArmaLite-10 platform. Therefore, offers you the opportunity to build an accurate 7.62 NATO or .308 shooter from the ground up.

The .308 80% Lower Receiver  Design features:

  • Unique reinforced polymer design with solid core design
  • ATF compliant design
  • Beefed up buffer tube ring and ribbing across the entire upper surface area.
  • No-thread design on the pistol grip area.
  • Stiffened magwell, ultra-light design.
  • See the product page for additional parts list

Is it legal?

YES! The 308 unit is well within the defined parameters of a “receiver blank” defined by the ATF. Therefore, it has not yet reached a stage of manufacture that meets the definition of firearm frame or receiver found in the Gun Control Act of 1968 (GCA).

308 80 percent lower jig.

AR-308 Jig: What Comes With It?

The Polymer80 .308 jig includes all parts required for machining, including the polymer receiver blank itself! Purchasing a stand-alone jig like the Elite Builder also provides you with all components necessary to cut and drill your receiver blank:

  • (2) Side plates
  • (3) Top plate templates
  • (1) Set of HSS drill bits
  • (1) HSS end mill bit (center-cut)

Tools Required:

  • Drill press
  • Table-top vise
  • Cutting fluid

Other 308 80% LOWER RECEIVER AND JIG SYSTEM  color kits available:

While other jigs on the market require a router or milling machine, the Elite Builder’s HSS end mill bit is designed to allow you to cut the fire control cavity with plunge cuts, vertical cuts made with the end mill in a similar fashion as drilling the cavity’s pilot holes.

This is easily accomplished using a cross-slide vise that affords lateral movement.

In conclusion, with a cross-slide and press, you can complete your 308 80% LOWER RECEIVER AND JIG SYSTEM – BLACK blank within two hours.

  • Michael Ruggiera

    I enjoy p80gunbuyer.com for all the things to check out firearm related. I’ve made many purchases off the website because of the ease of browsing, bidding, ordering and the choice of so many outstanding dealers that use the website. I haven’t any complaints, just keep up the good work p80gunbuyer.com.

  • Custer Carland

    Everything was great, but i cannot figure out how to access my item tracking info, its more than a week after the estimated delivery now, amd i have nonidea if my ffl has it or if its lost

  • Cary

    Everything was 99% perfect but somehow you had my address as N Market instead of S Market may have been my error. But no big deal I just went and picked up my shipment. Just have to correct my address with you.

  • Chad Wilhite

    Found the item on p80gunbuyer Got approval for transfer from my receiving FFL. Seller made contact with myself and my receiving FFL after I completed the checkout. Total transfer and shipping time was 3-days. Bought on Wednesday, picked up on Friday. OUTSTANDING!!!

  • s meyer

    I have nearly 4 successful transactions on p80gunbuyer and have been a loyal member since the first day you began
    I’m not a fan of your auto checkout…I’m old school and like to speak to the seller before buying

  • Mike Schmidt

    Transaction went smoothly. I was caught off guard by additional fees after I had already won the item. These fees were not there last time I purchased off p80gunbuyer.



    I have purchased three weapons, one I made a mistake on and had to cancel, and every dealer has been exceptional. Very good choice when looking to purchase a new or used firearm.

  • Thomas Thaler

    I ordered some previously hard to find magazines and ammunition. All products were delivered on time and were exactly as advertised. No issues; happy customer!

  • Richard L

    My first time using p80gunbuyer and of course I was a little hesitant buying from an internet site. But I am Happy to report Gunbuyer did a GREAT job. Everything was exactly as they stated. Will use the service again without hesitation. Job well done.

  • Edgar J Wimberly III

    With the exception of parts, cleaning supplies and ammo, I have never ordered a firearm online. The firearm I was looking for was in high demand and a friend recommended p80gunbuyer.com. With the exception of uploading the required identity document, (took numerous times), the transaction was seamless. I picked a local FFL from the list, submitted payment, and in three days had weapon in hand. Does not get any better than this.

  • John

    Ease of use and great utility.

    It was incredibly easy to use this service in order to find the pistol that I wanted. Though I had to pay a premium in order to get the 308 80% LOWER RECEIVER AND JIG SYSTEM” that I had been looking for, this was the exact place that could put me into contact with the correct seller. I’d definitely use this service again for the next purchase.

  • Roger Kays

    I have placed bids on various items on p80gunbuyer over the years and have always had a good experience. This last one was no different. The seller was on time with shipping and the price of the product, although a bit high, was what I expected during these times.

  • chris juhl

    Bought an overpriced 308 80% LOWER RECEIVER at another broker (My fault). ONLY p80gunbuyer.com is reasonable. Steve’s Outdoor Sports sold me a delta elite with springs in backwards so I sold it because it had issues and it was an NIB gun

  • Corey F. Piazza

    All in all had a great experience although there was a bit of delay on shipping, would total recommend this broker to some of my pals

  • Josh H

    Never had a problem with p80gunbuyer . Probably the best site to find good gun deals. I’ve bought several firearms from this site. Def my go too.

  • jose ortiz

    The best site so far.

  • Marshal Von

    Heavy, but strong, very nice, love it

  • Frank Depp

    The only negative i have is missing the bolt thats supposed to be supplied

  • Lucas

    Arrived on time great product great price

  • Rosaline

    Have not machined the lower yet or installed the parts (obviously 🙂 ) but the parts look great and shipped as fast as the current govt issues would allow. Am sure I will be more than happy with the items – unless I F them up 🙂

  • Frank Depp

    I have bought several 5D Tactical lowers and love everyone of them!!

  • Rosaline

    It is exactly what I was looking for, shame that whoever shipped it out input the incorrect address.

  • Paula Meyer

    great product, great price, would highly recommend

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