Showing 1–32 of 33 results
No 80% lower receiver build is complete without all its components. This LPK comes with everything you need: A lower parts kit, butt stock, and buffer tube assembly. All parts are US-made and CNC machined for precision fitment. All trigger components are mil-spec. This Lower Parts Kit Includes: Hammer Pistol Grip Trigger Pivot & Takedown…
We strive to provide accurate photographs of our product. Due to parts availability, this kit’s trigger and hammer may come in stainless or black. Want an LR-308 trigger that suffers no creep, take-up, or over-travel? Looking for the easiest-to-install LPK? How about the most affordable parts kit possible? This LR-308 LPK comes in at a…
Whether you bought stripped lower, or just finished an 80% lower, you’ll need two components to assemble it and make it functional: A lower parts kit, and a buffer tube assembly like this one. Buffer tube assemblies work with your lower parts kit, allowing your lower and upper receivers to work together. What’s Included Buffer…
This stock-less Buffer Tube Assembly is perfect if you’re completing an AR pistol, or if you bought a custom or upgraded stock for your rifle build. This kit includes all other buffer components needed to work with your lower parts kit and upper assembly. What’s Included Buffer Tube Carbine Buffer Recoil Spring Castle Nut Latch…
Want an AR-15 trigger that suffers no creep, take-up, or over-travel? Looking for the easiest-to-install LPK? How about the most affordable parts kit possible? This mil-spec AR-15 LPK comes in at a great price with machining and performance that feels match-grade. Polished for Performance Inside this kit, you’ll find a disconnector, hammer hook, and sear…
Let’s face it: just having a bare buffer tube or pistol tube on the end of your pistol build makes your pistol look like it skipped leg day at the gym? Slap a proper pistol brace on there and enjoy better accuracy and comfort with the SBA3 Pistol Stabilizing Brace by SB Tactical. This SBA3…
Some of us like our AR platform rifles traditional or built as close to mil-spec as possible. We build replicas of that Colt model 629 or of the old-school M-16, because we want that nostalgia when we shoot. There’s just one problem: the mil-spec triggers of these rifles of a bygone era were gritty and…
The original M4-type buttstock. Aftermarket stocks are awesome, but some builders prefer the good ole’ mil-spec stuff. This M4 six-position buttstock perfectly replicates the stock found on service-issued rifles. It’s made from the same injection-molded polymer and sports a six-position-adjustable latch for dialing in length of pull. M4 Stock: Mil-Spec Fitment (1.148″ OD) This “M4″…
This kit contains replacement threaded components that come with Premium 80% Lowers (Fire/Safe Marked Billet) and AR-9 (9MM) 80% Lowers (Billet). These receivers feature upgraded bolt catch and takedown detent fittings. Both fittings are threaded. A 1/16 sized hex key will work for both set screws. Replacement Set Includes: 1 x 6/32″ Bolt Catch Roll…
Give Your AR the 1911 Treatment. These are real, bona fide 1911 grips, complete with standard grip panel threaded inserts, made specifically for the AR platform! Anodized and available in Black, Gray, or OD Green, these grips are incredibly strong and lightweight, while improving ergonomics by offering a more vertical grip angle. Note: Grip panels…
No LR-308 80% lower receiver build is complete without a buffer kit. In combination with a lower parts kit (sold separately), this kit includes all components necessary to finish assembling your .308 lower receiver. What’s Included Buffer Tube .308 Buffer Recoil Spring Castle Nut Latch Plate Adjustable Stock Mil-Spec / Standard Buffer Fitment This buffer…
A no-brace lower build kit for your custom AR-15 pistol. This lower build kit is the perfect affordable choice for completing your AR-15 pistol build. It includes a mil-spec LPK and buffer kit with no pistol brace nor buttstock. Add your own brace later, or just run it slick. Classic Lower Parts Kit This Classic…
The original mil-spec AR-15 lower build kit. Includes the O.G. pistol brace, the SBA3 from SB Tactical. This mil-spec lower build kit includes the parts you need to assemble your stripped lower receiver, completing the “lower half” of your custom AR-15 pistol build. Classic Lower Parts Kit This Classic LPK features a mil-spec hammer and…
The Kak Industry AR15 Lower Parts Kit comes with all of the basic essentials you’ll need for your own custom AR15 build. This build kit includes the following: bolt catch kit magazine catch kit hammer & trigger pins pivot pin & detent & spring buffer retainer pin & spring takedown pin & detent spring safety…
This AR15 LPK Missing Parts Kit has all the essentials for any lost parts, replacement parts, or for your next custom build. All parts are proudly made in the USA. This LPK Missing Parts Kit comes with: (1) buffer retainer (1) buffer retainer spring (1) bolt catch detent (2) bolt catch springs (2) selector detents…
The KAK Industry AR15 Pin & Detent Parts Kit is made out of the best parts on the market. This kit is great for replacement parts, a new build, or having spare parts. This kit includes: a pivot pin takedown pin pivot and takedown detents hammer and trigger pin bolt stop plunger bolt stop roll…
This is a replacement ejector plate and magazine release kit for our AR9 80% Billet Lower Receiver. Ejector Plate Specifications: Made from 17-4 Stainless Steel hardened to RC42 2 cap screws included Mag Release Specifications: Billet aluminum magazine catch Dowel pin, spring and set screw included Lower receiver not included.
This is a replacement ejector for our AR9 80% Billet Lower Receiver. Features: Made from 17-4 Stainless Steel hardened to RC42 Includes 2 cap screws Lower receiver not included.
This is a replacement magazine release kit for our AR9 80% Billet Lower Receiver. Features: Billet aluminum magazine catch Dowel pin, spring and set screw included Lower receiver not included.
If you’re like the rest of us, you find the mil-spec A2 grip that came standard on your AR severely lacking in the area of comfort. Its hard plastic never really gets comfortable, and its angle and texture don’t stop your from getting fatigue, especially after extended use. And if you’ve got larger hands, the…
Notched-Hammer Sporter Lower Parts Kit for Older and Surplus AR-15 Uppers Many vintage Colt, Bushmaster and surplus AR-15 uppers run unshrounded bolt carrier groups, and a standard hammer can strike the carrier in those rifles. Gun Nuts cuts a notch into the hammer in this Sporter kit to clear them, so you can put a…
This step-by-step downloadable guide describes how to install an AR-15 lower parts kit into a standard stripped lower receiver. These instructions apply to 80% lowers and AR-type pistol and rifle builds chambered in 5.56 NATO/.223, 300 BLK, and 6.5 Grendel. How do you get your download? ***You can download your digital purchases by clicking the…
Straight-Faced Single-Stage Drop-In Trigger for AR-15 Builds A lot of shooters would rather run a flat, straight-faced trigger than the standard curved shoe, and the JMT Black Ops is built for exactly that crowd. This single-stage, drop-in unit swaps your AR’s gritty mil-spec pull for a light, clean 3.5 to 4 lb break, and you’ll…
So you’ve milled out and drilled the holes in your LR-308 lower. By now, you’ve done your research, and you’ve learned there’s a difference between Colt’s AR-10 and everybody else’s LR-308. You’ve also learned that unfortunately most all the .308 parts on the market are titled AR-10, and you wanna save the hassle of trying…
Get yourself a buffer tube assembly that will withstand just about anything. Forged form 7075-T6 aluminum, the buffer tube is not only lightweight, but is extremely durable as well. It’s also compatible with most aftermarket adjustable stocks to allow for more personalization and custumization. This kit includes the following: end plate, castle nut, buffer tube,…
The Magpul ASAP QD is a Melonite coated steel, that offers a wide range of motion, providing an advantage by preventing sling snagging and easy transitions to the weapon or shoulder. The ASAP QD is compatible with one-point type slings that offer push-button detachable sling swivels. Additional Features: Compatibility: Mil-Spec and Commercial Spec Carbine Receiver…
A More Comfortable AR-15 Grip with a Steeper Angle and Built-In Storage The standard mil-spec AR-15 grip is one of the rifle’s few real weak points. Its shallow, upright angle forces your wrist into an awkward position, and it never quite feels right in the hand. The Magpul MOE AR-15/M4 Grip fixes that with a…
Magpul® has built quite a name for themselves over the years with their aftermarket AR platform furniture and add-ons. Take their MOE® grip for your AR. It feels great, the grip angle is miles ahead of the standard A2 grip your AR probably came with. Also, its polymer construction makes it a simple yet amazing…
The Magpul MOE+ Grip has a reinforced rubber mold wrapping around the polymer body, allowing for maximum comfort and weapon control. The durable material prevents snags and damage, permitting peak performance in rugged environments. The MOE+ Grip includes a grip cap and additional storage for gear. Additional Features: Beavertail Backstrap Grip Angle: 25 degrees Height:…
Mil-spec, 4.6 ounces, fits all standard buffer tubes. This H2 buffer provides a reduction in bolt carrier group travel and increases recoil damping, making it ideal for over-gassed AR-15s, suppressed setups, and super safeties and forced reset selectors. H2 Buffer Features & Specs Weight: 4.6 oz. Size: Carbine All-steel construction Fits all mil-spec buffer tubes…
The affordable way to finish your AR-9 pistol build. Need all the lower parts for your AR-9 receiver? Grab this lower build kit! It includes the necessary 9mm buffer, a tube, recoil spring, and LPK for assembling your 9mm AR lower receiver. Lower Parts Kit This LPK features a mil-spec hammer and trigger, with standard…
The affordable way to finish your AR-9 pistol build. Now with a brace! Need all the lower parts for your AR-9 receiver? Grab this lower build kit! It includes the necessary 9mm buffer, a tube, recoil spring, and LPK for assembling your 9mm AR lower receiver. It also includes the original AR-type pistol brace, the…
All the parts you need to get your AR’s lower ready for an upper.
The piece-by-piece nature of building the AR-15 can get a little overwhelming, especially if it’s your first time. That’s why we’ve compiled all the AR-15 parts that you need to complete the “lower half” of your rifle or pistol. With a fully built lower assembly, you can attach a barreled upper receiver, slap in a magazine, and start hitting targets at the local range.
In addition to a fabricated 80% lower receiver or AR-15 stripped receiver bought from an FFL, you’ll need the following components which can all be found right here:
New builder? Use our Master guide to pick the right lower parts.
One of the easiest ways to upgrade your AR before you even finish your build is by simply swapping out your factory trigger setup for a drop-in unit, like the ones available from ACT and Rise Armament. These self-contained triggers include the trigger, disconnector, and hammer preinstalled. All you need to do is drop the unit into the receiver, and tap in your pins!
Need help with assembly? Here’s how to install the AR-15 lower parts kit.
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DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At 80-Lower.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.
