Skip to content

Skip to navigation Skip to content

Your Cart

Most Orders Over $200 Ship FREE!

Order by 3PM Central for Same Day Shipping

Earn cashback with every order! Learn more.

Search for:

Guns & NFA
Mags
- 5.56/300BLK
- SR25/AR10
- 6mm ARC
- AK
- Handgun
- PCC & Subgun
- Parts & Accessories
Ammo
Parts & Accessories
Lights
Sights & Optics
- Optics
- LPVO & Scope Mounts
  - 30mm
  - 34mm
  - 35mm
- Mount Accessories
  - 30mm
  - 34mm
  - 35mm
- Red Dot Mounts & Risers
- Iron Sights
- IR Devices
Gear
Cleaning, Lube & Tools
Glock Parts
- Gen 3
- Gen 4
- Gen 5
- Gen 6
- Slimline
- Sights
- MOS Optic Plates
HK Parts
- USP
- MP5 & MP5K
- MP7
- HK416 & MR556
- HK417 & MR762
1911 & 2011
Other Gun Parts
Brands
Training
Blog
Support

Browse

Want to Chat?

Contact Us

Social

Facebook Instagram

Search for:

Browse

My Account
Customer Support

Want to chat?

Social

Facebook
Instagram
YouTube

All inventory is live; if it’s in-stock, it’s ready to ship!

18"

Home / All AR Upper Parts / Barrels / AR15/M4 Barrels / 18"

Showing all 4 results

18", All AR Upper Parts, AR15/M4 Barrels, Barrels

Criterion Core 18″ .223 Wylde Rifle Barrel, 1:8 Twist
Rated 3.67 out of 5
$313.49 Add to Cart
18", All AR Upper Parts, AR15/M4 Barrels, Barrels, July 20

Sons of Liberty Gun Works 18″ .223 Wylde Rifle Precision SPR Barrel
Rated 5.00 out of 5
$399.00 Add to Cart
18", All AR Upper Parts, AR15/M4 Barrels, Barrels

Criterion HBAR 18″ .223 Wylde Rifle Gas Barrel, 1:8 Twist
Rated 5.00 out of 5
$313.49 Add to Cart
Out of stock

18", All AR Upper Parts, AR15/M4 Barrels, Barrels

Daniel Defense 18″ 5.56 Hammer-Forged Rifle Gas Barrel, S2W Profile
$328.00 Read More

Showing all 4 results

Search for:

Shop by Brand

Product categories

STORE

Home
About
Support
Heroes Program

ACCOUNT

account
privacy policy
terms and conditions

FOLLOW

Instagram
Youtube
Facebook
Reddit

SIGN UP

Sign up for our mailing list to be the first to know when new deals drop!

Your email:

Home of the Fastest Sweatshop in the West

© Rooftop Defense 2026. All Rights Reserved.

STORE

Home
About
Support
Heroes Program

ACCOUNT

account
privacy policy
terms and conditions

FOLLOW US

Instagram
Youtube
Facebook
Reddit

SIGN UP

Sign up for our mailing list to be the first to know when new deals drop!

Your email:

Home of the Fastest Sweatshop in the West

© Copyright Rooftop Defense 2025. All Rights Reserved.