Aero M4E1 11.3-inch BA Hanson Suppressed Build on a PSA Stealth Lower
$3,002.4522 parts
Build your own AR-15
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Pick a part for each slot in our free AR-15 builder, check that it all fits, and see the best price across stores for every part.
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Parts builders pick most
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Geissele Super Semi-Automatic Enhanced (SSA-E) Trigger- 05-160
$245.00 at Brownells · 9 stores
In stock
Aero Precision AR-15 M4E1 Stripped Lower Receiver - Black
$124.99 at Aero Precision · 3 stores
AR-15 Talon Safety Selector Ambidextrous Black
$64.95 at Brownells · 7 stores
In stock
H1 Super 42 Braided Wire Buffer Spring And Buffer Combo, H2
$114.00 at Brownells · 7 stores
In stock
MOE K2+ Grip Polymer Black
$17.99 at GunMag Warehouse · 9 stores
In stock
M16 Bolt Carrier Group Black
$211.26 at Brownells · 5 stores
In stock
B5 Systems SOPMOD Bravo Stock - Black BRV-201-01
$58.99 at Palmetto State Armory
Magpul MBUS Pro Offset Sight – Rear - MAG526
$89.99 at GunMag Warehouse · 6 stores
In stock
From the blog
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How to Build an AR-15: Parts List, Tools & Steps
Everything you need to build an AR-15: parts list with current prices, tools, and step-by-step photos for the lower and upper receiver.
AR-15 Accessories Checklist: What You Actually Need
A short, practical AR-15 accessories list: what to buy first, what can wait, and picks with today's best price.
Red Dot vs LPVO vs Prism Scope: Which AR-15 Optic?
How red dots, low-power variable optics and prism scopes differ, who each one suits, and what mount each needs on an AR-15.
AR-15 vs M4: What's the Difference?
The AR-15 and the M4 look almost the same. Here's what actually differs, what civilians can buy, and how to build an M4-style rifle …