AR 15 Lower Parts | AR15 Lower Receiver Parts, Buffer Tubes, Triggers & Magazines
AR 15 Lower Parts
Shop AR-15 lower parts and components at Moriarti Armaments for completing, upgrading, or maintaining your AR platform. Browse AR-15 lower parts kits (LPK), magazines, stocks, pistol grips, triggers, buffer tubes, buffers, buffer springs, selectors, takedown pins, magazine catches, bolt catches, and other lower receiver components. Whether you're looking for a complete AR-15 LPK, replacement hardware, furniture, or an upgraded recoil system, this category brings essential lower components together in one place. Explore Mil-Spec AR-15 parts in multiple configurations, materials, finishes, and styles from Moriarti and other trusted manufacturers. Use the individual subcategories to quickly find the lower receiver parts and accessories needed for your specific AR-15 configuration.
What parts are needed for a complete AR-15 lower?
A complete AR-15 lower generally includes the lower receiver, lower parts kit, trigger or fire-control components, pistol grip, buffer tube, buffer, buffer spring, and stock or other appropriate rear configuration. The lower also works with a compatible AR-15 magazine. Exact components vary by configuration, and some lower parts kits exclude the trigger, grip, or buffer system, so always check what is included before purchasing.
Refine Search
-9%
AR 5.56 Cal Aluminum 30 Rnd Mag With Anti-Tilt Follower - Gold Plated
Specifications: Caliber: 223 Remington / 5.56 NATO / 300 Blackout Capacity: 30 Rounds..
AR-15 7.62x39 30-Round ASC Magazine – Black, U.S.A. Made
AR-15 7.62x39 30-Round ASC Magazine – Enhance your shooting experience with this 30-round magazine d..
AR-15 Anodized Accessory Accent Kit | Available in Blue, Red, FDE – Upgrade Your AR-15
Available in Blue, Red, and FDEElevate your AR-15 with the Red Anodized Accessory Accent Kit. This c..
-1000x1000-228x228.webp "AR-15 Featureless Stock - HERA CQR | Juggernaut Tactical | Customizable & Precision Shooting")
AR-15 Featureless Stock - HERA CQR | Juggernaut Tactical | Customizable & Precision Shooting
Upgrade your AR-15 with the HERA CQR Featureless Stock from Juggernaut Tactical. Designed for precis..
AR-15 Lower Parts Kit w/ Drop-In Trigger, Ergo Grip, Anti-Walk Pins – Complete Mil-Spec Kit
The AR-15 Lower Parts Kit with Drop-In Trigger is a comprehensive kit designed for builders looking ..
AR-15/AR-10 Lower Upgrade Kit - Enhanced | Ambi Safety, Trigger Guard, Extended Mag Release | Multiple Color Options
Elevate your AR-15 or AR-10 with this Enhanced Lower Upgrade Kit, featuring premium components desig..
DURAMAG 20RD 5.56 ALUM MAG DG/BK
DURAMAG, Magazine, 223 Remington/5.56 NATO/300 Blackout, 20 Rounds, Fits AR-15, Black AGF Follower, ..
HEXMAG Series 2 AR-15 30-Round Magazine – 223 Remington/5.56 NATO, Black
The HEXMAG Series 2 30-round magazine is designed for AR-15 rifles chambered in 223 Remington and 5...
KCI AR-15 100 Round Drum Magazine - 5.56 Caliber, High Capacity Magazine
The KCI AR-15 100 Round Drum Magazine is designed to deliver unmatched firepower and reliable perfor..
MAG DURAMAG 20RD 6.5 GRENDL SS BLK
DURAMAG, DuraMag SS, Magazine, 20 Rounds, Fits AR15 Pattern Rifles in 6.5 Grendel/6MM ARC, Blue AGF ..
MAG DURAMAG 20RD 6.8SPC SS BLK
DURAMAG, DuraMag SS, Magazine, 224 Valkyrie/6.8 SPC, 20 Rounds, Fits AR Rifles, Gray AGF Anti-tilt F..
MAG DURAMAG 30RD 5.56 ALUM ODG
DURAMAG, DuraMag Speed, Magazine, 223 Remington/5.56 NATO, 30 Rounds, Fits AR Rifles, Black AGF Anti..
-20%
MAG MFT EXTREME DUTY 5.56 30RD AMFV
Mission First Tactical, Magazine, 223 Remington/5.56 NATO, 30 Rounds, AR-15..
-20%
MAG MFT EXTREME DUTY 5.56 30RD WLVRN
Mission First Tactical, Magazine, 223 Remington/5.56 NATO, 30 Rounds, Fits AR-15..
-13%
MAGPUL PMAG AK MOE 7.62X39 30RD BLK
Magpul Industries, Magazine, MOE, 7.62X39, 30 Rounds, Fits AK Rifles, Black..
MAGPUL PMAG MOE 5.56 30RD BLK
Magpul Industries, Magazine, PMAG 30 AR/M4 GEN M2 MOE, 223 Remington/5.56 NATO, 30 Rounds, Fits AR R..
PROMAG AR15 7.62X39 50RD DRUM BLK
ProMag Industries, Drum Magazine, 7.62X39MM, 50 Rounds, Fits AR-15 Pattern Firearms Chambered in 7.6..
-50%
AR-15 T6 Aluminum Adjustable Sniper Grip – Gen 2 | Matte Black
Upgrade your AR-15 rifle with the Gen 2 T6 Aluminum Adjustable Sniper Grip, engineered for precision..
Adaptive Tactical EX Performance Stock – AR-15/AR-10 Compatible, Black - AT-02012
The Adaptive Tactical EX Performance Stock offers enhanced comfort, recoil control, and adjustabilit..
ALG Defense Combat Trigger | 6-Pound Pull | Single-Stage | Nickel Boron Plated
The ALG Defense Combat Trigger (ACT) is designed for shooters who prioritize reliability, tradition,..
AR AIRLITE SERIES SKELETONIZED ALUMINUM PISTOL GRIP
T6 Aluminum Total Weight: 3.1 oz!Airlite Series Extremely LightweightErgonomic Groove..
AR AIRLITE SERIES SKELETONIZED ALUMINUM PISTOL GRIP - ANODIZED PURPLE
T6 Aluminum Total Weight: 3.1 ozAirlite Series Anodized Purple FinishExtremely Lightweight..
AR AIRLITE SERIES SKELETONIZED ALUMINUM PISTOL GRIP - BLUE
T6 Aluminum Total Weight: 3.1 oz!Airlite Series Cerakote Blue FinishExtremely Lightwe..
-20%
AR Breach Brace Pistol Stabilizer – ATF Approved, Low Profile, Fits AR-15/AR-10/AR-9 Platforms – Moriarti Arms
The Moriarti Arms Breach Brace Pistol Stabilizer is a sleek, low-profile, and ATF-approved pistol b..
AR MAGPUL MOE SL CARB STK COMMERCIAL GRAY
Magpul Industries, MOE Slim Line Carbine Stock, Fits AR-15, Com-Spec, Gray FinishManufacturer: ..
-44%
AR SILENT BUFFER ASSEMBLY SPRING - SBA Recoil Spring - H2
Looking for a buffer system that offers superior sound mitigation and easy installation for your AR-..
AR-15 .223/5.56 HEXMAG Carbon Fiber 30RD Magazine – Dark Grey | Durable & High-Capacity
The AR-15 .223/5.56 HEXMAG Carbon Fiber 30RD Magazine in Dark Grey is the ideal choice for AR rifle ..
-20%
AR-15 80% Lower Receiver - 4th of July Limited Edition - Life Liberty Engraving
This Anodized 80% Lower Receiver comes with a limited time 4th of July graphic of your choice engrav..
-31%
AR-15 80% Lower Receiver - Choose Color | Cerakote | 7075-T6 Forged Receiver
This AR-15 80% lower receiver is crafted from 7075-T6 aluminum forgings and finished in a durable Tu..
-86%
AR-15 A2 Rifle Buffer Spring – Full Length, Steel, Made in USA
This AR-15 A2 Rifle Buffer Spring is designed for use with full-size, fixed rifle stock systems. Man..
-30%
AR-15 Anodized 80% Lower Receiver – MIL-SPEC 7075-T6 Forging
Moriarti's anodized AR-15 80% lower receivers are designed with the DIY gunsmith in mind. Constructe..
-30%
AR-15 AR-15 Lower Parts Kit / Cerakote RED
AR-15 AR-15 Lower Parts Kit / Cerakote RED - Moriarti Armaments' AR-15 Lower Parts Kit elevates..
-47%
AR-15 Carbine Buffer Spring
The AR-15 Carbine Buffer Spring is designed to work with all standard AR-15 models and is compatible..
-29%
AR-15 COMPLETE LOWER PARTS KIT WITH ERGONOMIC POLYMER PISTOL GRIP
AR-15 COMPLETE LOWER PARTS KIT WITH ERGONOMIC POLYMER PISTOL GRIP U.S.A. Made Lower Parts Kit Inc..
AR-15 COMPLETE LOWER PARTS KIT WITH TRIGGER GUARD AND MAGPUL MOE GRIP
KIT INCLUDES: Magpul Moe Pistol Grip (comes in black by default, you may choose a M..
-228x228.webp "AR-15 Complete Micro Compact Buffer Tube 3.5'' | Choose Cerakote Color")
AR-15 Complete Micro Compact Buffer Tube 3.5'' | Choose Cerakote Color
Features:Material: 7075-T6 AluminumFinish: Choose ColorLength: 3.5” estimate depending on the lower...
AR-15 Enhanced Trigger Guard - Multiple Colors Available
The AR-15 Enhanced Trigger Guard is a must-have for any shooter looking to improve the comfort and f..
AR-15 Extended Bolt Catch Release - Contoured Design - Choose Your Color
The AR-15 Extended Bolt Catch Release is designed for enhanced performance and quick, one-handed ope..
AR-15 Extended Lower Takedown Pin Set - Front & Rear - G2 - Choose Color
Key Features: Extended Takedown Pins: The set includes both the front and rear extended takedow..
AR-15 EXTENDED TAKEDOWN PIN SET / CERAKOTE COLOR OPTIONS
CHOOSE YOUR CERAKOTE COLOR ON TOP OF PAGE.The extended and grooved head on the pin makes separating ..
-20%
AR-15 Finishing Kit | Black Chrome | Includes Ambi Safety, Charging Handle, & More
Enhance your AR-15 build with the AR-15 Finishing Kit in Black Chrome, a complete parts kit designed..
AR-15 Finishing Kit | Chrome Finish | Includes Ambi Safety, Charging Handle, & More
Upgrade your AR-15 build with the AR-15 Finishing Kit in Chrome Finish, a complete parts kit designe..
AR-15 Fire Control Group - 24K Gold Plated
Key Features: Gold Plated Finish: The lever is coated with a gold-plated finish, adding a lu..
AR-15 FIRE CONTROL GROUP - TIN COATED
Kit Includes: Hammer, Trigger, & DisconnectorUS Made Tin FinishEnhanced Smooth Trigger Pull..
-30%
AR-15 H2 Carbine Buffer Tube Kit w/ Standard End Plate - Force Reset Trigger Ready
AR15 Buffer Tube Assembly w/End Plate Mil-Spec 6 Position Buffer Tube4.6 oz. BufferBuffer Sprin..
AR-15 H3 Heavy Carbine Buffer | 5.5 oz | Black Nitride | US Made
The AR-15 H3 Heavy Carbine Buffer is a 5.5 oz buffer designed for compatible carbine-length AR-15 re..
AR-15 HBPDW Adjustable PDW Pistol Stabilizing Brace Kit w/ Buffer & Spring – SB Tactical
Designed by Q® and built by SB Tactical, the HBPDW™ Pistol Stabilizing Brace is a modern, PDW-style ..
-36%
AR-15 LE M4 6 POSITION MIL-SPEC STOCK KIT
AR-15 LE M4 6 POSITION MIL-SPEC STOCK KIT - The L-E stock was designed to conform with design parame..
-30%
AR-15 Lower Parts Kit / Cerakote Pink
U.S.A. Made Lower Parts Kit Includes the following:CERAKOTE PINK Pistol Grip CERAKOTE..
-30%
AR-15 Lower Parts Kit / Cerakote Tiffany Blue
AR-15 Lower Parts Kit / Cerakote Tiffany Blue U.S.A. Made Lower Parts Kit Includes the following:..