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Table of Contents
- Why do we need an AR 15 Lower Receiver?
- Best Pick
- Top 14 Best Lower Receiver AR 15
- #1 WILSON COMBAT LOWER RECEIVER BILLET
- #2 WILSON COMBAT LOWER RECEIVER FORGED
- #3 17 DESIGN AND MANUFACTURING BILLET LOWER RECEIVER
- #4 SILENCERCO BILLET LOWER RECEIVER
- #5 SONS OF LIBERTY GUN WORKS LOWER RECEIVER
- #6 V SEVEN WEAPON SYSTEMS LOWER RECEIVER LITHIUM ALUMINUM
- #7 ANDERSON MANUFACTURING 80% LOWER RECEIVER
- #8 V SEVEN WEAPON LOWER RECEIVER ENLIGHTENED ALUMINUM
- #9 STAG ARMS STRIPPED LOWER RECEIVER
- #10 SPIKES TACTICAL STRIPPED LOWER RECEIVER
- #11 CMC Triggers Complete Lower Receiver Parts Kit
- #12 CMMG, Inc AR-15 Lower Reciever Parts Kit
- #13 Aero Precision AR-15 Lower Parts Kit
- #14 Aero Precision AR-15 Magpul MOE SL Lower Parts Kit
The precision lower receiver is a foundation of any quality AR-15 rifle to ensure firearm optimization. Various manufacturers of Lower Parts Kits (LPKs) provide different fitting: some can be easier to put together than others.
Why do we need an AR 15 Lower Receiver?
Lower Receiver Parts allow customized AR-15 builds for the best and most convenient shooting experience. Many lower receivers feature duly machined mil-spec components.
SONS OF LIBERTY GUN WORKS LOWER RECEIVER
These Assembled AR-15 ‘Semi-Complete’ Lower Receivers don’t come with the stock and trigger to allow shooters to choose according to their preferences.
The Lowers are designed for a 5.56 mm NATO Cartridge. They have a fully-machined contour that doesn’t leave flash marks from the forging. The tight tolerances ensure better fitting than other lowers.
Top 14 Best Lower Receiver AR 15
#1 WILSON COMBAT LOWER RECEIVER BILLET
#2 WILSON COMBAT LOWER RECEIVER FORGED
The forged lower receivers with Black Finish can be used to build out an M16A1 parts kit.
#3 17 DESIGN AND MANUFACTURING BILLET LOWER RECEIVER
The Stripped billet Lower Receiver is machined to mil-spec dimensions and operates well with standard AR15 parts. The Upper tensioning screw ensures fine-tune. Wider angles of flared mag well angles give a more flared feel without increasing the width/footprint of the lower receiver.
#4 SILENCERCO BILLET LOWER RECEIVER
The receiver features Sling Cups at the rear, inner ambidextrous anti-rotation QD, 45 to 90-degree fire selector window for short-throw fire selectors. The lower comes with the mounting pin, spring, detent for the Ambi bolt release, and Rear tension bolt hole (but the bolt isn’t included). The AR-15 Billet Receiver is manufactured from Aluminum (7075) with a Type 3 Hard Coat Anodized finish.
#5 SONS OF LIBERTY GUN WORKS LOWER RECEIVER
The AR-15 ‘Semi-Complete’ Lower Receivers don’t include the stock and trigger, as these parts are the most replaceable ones according to the shooters’ preferences. The Lowers are available with either the Rebellious Stripes or Angry Patriot roll marks, completed with Take Down Pins, Carbine Buffer Tube Assembly, B5 P23 Grip, Installed Bolt, and Magazine Releases. The Angry Patriot comes without a safety selector or FCG.
#6 V SEVEN WEAPON SYSTEMS LOWER RECEIVER LITHIUM ALUMINUM
#7 ANDERSON MANUFACTURING 80% LOWER RECEIVER
#8 V SEVEN WEAPON LOWER RECEIVER ENLIGHTENED ALUMINUM
#9 STAG ARMS STRIPPED LOWER RECEIVER
The multi-caliber Ambi standard Lower Receiver is stamped for the state of CT.
It fits a BCM upper receiver. The Lower is constructed from Aluminum (7075 T6) with a Type 3 Hard Coat Black Anodized finish. The receiver is equipped with a drilled front trigger guard pinhole, a spring-loaded detent that fits in a hole on one side only. The rear is the only end that uses an actual pin that goes all the way through.
#10 SPIKES TACTICAL STRIPPED LOWER RECEIVER
#11 CMC Triggers Complete Lower Receiver Parts Kit
The Mil-Spec AR15 Lower Parts kit consists of Bolt Catch with Plunger and Spring, Buffer Retainer with Spring, Mag Release with Button and Spring, Roll Pin, Safety, Safety Detent with Spring, Take, Trigger Guard with Roll Pin. The Fire control group and grip are not included.
#12 CMMG, Inc AR-15 Lower Reciever Parts Kit
There is the same completeness of 2 models: 2x Hammer and Trigger Pin, 2x Takedown Pin Detent with Springs, Bolt Catch with Plunger, Spring, and its Pin, Buffer Retainer with Spring, Magazine Catch with Spring, Magazine Release Button, Receiver Pivot Pin, Selector Detent, Takedown Pin. Additionally to these main parts, one model has a Safety selector, the second one – Ambidextrous Selector, Disconnect with Spring, Hammer with Spring, Lock Washer, Pistol Grip, and Screw, Trigger with Spring, Trigger Guard Assembly, and Trigger Guard Pivot Spring Pin.
The third model comes with such accessories: A2 Grip, Bolt Catch with its Plunger, its Roll Pin and its Spring, Buffer Retainer Pin with Spring, Detent Spring, Disconnector with Spring, Grips Screw & Washer, Hammer with Spring, Magazine Catch with Spring, Magazine Release Button, Pivot Pin, Rear Takedown Pin, Safety selector with Detent, Selector Spring, Takedown Pin Detent, Trigger with Spring, and Trigger Guard. These kits don’t include a trigger guard, fire control group, and pistol grip.
#13 Aero Precision AR-15 Lower Parts Kit
The Mil-spec Lower Parts Kit is outfitted with a versatile Magpul MOE Grip and Magpul MOE Trigger Guard, allowing it to assemble an AR15 Gen 2 build. The kit consists of takedown and Pivot Pin, Detent, and Spring, Bolt Catch with Buffer, Roll Pin, Spring, Magazine Catch Body with Button and Spring, Buffer Retainer with Spring, Safety Selector with Spring and Detent, 4-40 Set Screw (for threaded takedown pin detent hole), Hammer with Spring, Trigger with Spring, Trigger/Hammer Pins, Disconnector with Spring.
#14 Aero Precision AR-15 Magpul MOE SL Lower Parts Kit
This Mil-spec Lower Receiver kit comes without a fire control group. The Lower Parts Kit is equipped with a Magpul MOE Trigger Guard, a versatile Magpul MOE Grip (both available in Anodized Black or FDE), Pins, Detents, and Springs for Takedown and Pivot, Bolt Catch with Roll Pin, Buffer, Spring, Buffer Retainer with Spring, Magazine Catch Body with Button and Spring, 4-40 Set Screw (for threaded takedown pin detent hole), Safety Selector with Spring and Detent. Multiple components in the kit are not cross-compatible with .308-AR lower.
While choosing AR Lower Receivers, check the quality of finish, completeness (what is included or not), reviews about missing parts (rare cases or frequent ones), and compatibility with AR builds. Usually, detents and springs are quite the same, while magazine releases and safety selectors can vary a bit.
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