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AR 15 Lower Parts
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- 2020 New Scopes
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- KynSHOT Precision Carbine Recail Dampers
- Lancer Systems 20 Round 300 BLK Magazines
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- Lights and Lasers
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- Magpul 2nd Generation MS3 Single QD Slings
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- Magpul Magazines
- Magpul PMAG 10 M3 Generation Magazines
- Magpul Type 1 or Type 2 Rail Covers
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- Mission First Tactical California Compliant BATTLELINK Stocks
- Modern Mk12 SPR Build
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- PCC AR9 3Gun Starter
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- Select Anderson Manufacturing 16 inch 556 NATO M4 Uppers
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- Select Ghost Firearms Pistol Kits
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- Shooting Gear
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- Spikes Tactical Complete Lowers
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- Stocks Under 60 Dollars
- Strike Industries AK or AR Featureless Grips
- Strike Industries AR15 Shift Pins
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- VG6 Precision Gamma High Performance Muzzle Brakes
- Veterans Day Deal
- WMD NiB X AR15 Stripped Forged Upper Receivers
- Wholesale Featured Products
- X39 Space Gun Build
- XD S Holsters
- Yankee Hill Machine Phantom Flash Hiders
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LEARN MORE ABOUT AR-15 PARTS AT PRIMARY ARMS
Primary Arms is your headquarter for AR 15 parts. Buy a complete AR 15 lower parts kit to fine-tune your latest build or individual parts like roll pins and detent springs. Find popular parts like a Bravo Company buffer tube, or a Magpul BAD Lever. All our lower parts come from the best manufacturers in the world, like Aero Precision, Anderson Manufacturing, Armalite, CMMG, Daniel Defense, Geissele, Hogue, JP Enterprises, Midwest Industries, Mission First Tactical, Odin Works, Radical Firearms, Rock River Arms, Seekins Precision, Strike Industries and more.