Windham 450 Thumper .450 Bushmaster Semi-Automatic Rifle
User Ratings
No ratings yet
Be the first to review this product
Windham 450 Thumper .450 Bushmaster Semi-Automatic Rifle
What's in the Box
- Windham Weaponry 450 Thumper
- (1) Magazine
- Rifle Sling
- Hard Plastic Gun Case
- Windham Weaponry’s Transferable Lifetime Warranty
- Owner’s Operating and Safety Manual
Firearm Specifications
- Model: R16SFSL-450
- Caliber: .450 Bushmaster
- Type: Rifle
- Action: Semi-Automatic, Gas Impingement System
- Capacity: 5 + 1- Ships with one 5 Rd. Magazine
- Safety: Manual Lever with Indicator Markings on Both Sides of Receiver
- Receiver: Flat Top Type Upper Receiver with Laser Engraved Caliber
- Receiver Material: Forged 7075 T6 Aircraft Aluminum with Aluminum Trigger Guard
- Barrel: 16” Chrome Lined with A2 Flash Suppressor
- Bolt Material: Carpenter 158 Steel
- Barrel Material: 4150 Chrome Moly Vanadium 11595E Steel
- Rifling: 1 Turn in 24” – Right Hand Twist
- Stock: Luth-AR Buttstock with adjustable buttplate & cheekrest
- Forend / Pistol Grip: WW Free-Float Forend / Hogue Overmolded Beavertail Grip
- Rear Sight: None – Ready for optics or other type accessory sights
- Front Sight: None – Ready for accessory sights
- Packaging: Hard Plastic Gun Case with Black Web Sling & Operators Manual
Specifications
- Manufacturer:
- Windham Weaponry
- Category:
- lower-receiver
- Platforms:
- AR-15
- MPN:
- R16SFSL-450
- Required Component:
- Yes
- Complete Firearm:
- Yes
Parts Cabinet
Track parts you own or plan to buy.
Where to Buy
Sponsored
MantisX
The smart way to train your AR build
Built your rifle — now train it. BlackBeardX installs in minutes and turns your AR into a full dry fire system with smart feedback on every pull.
Shop BlackBeardXPrice History
Current
$1,049.99
Lowest
$1,049.99
Highest
$1,049.99
Price Alert
Sign in to save a target price and receive an email when this component drops.
Sign In to Set AlertBundle Package
This is a bundled product that includes multiple components. The exact contents may vary - check the product description for more details.
• Complete assembly ready to use
• Multiple components included
• Value package pricing
Similar Products
Griffin Armament MK2 Ambi Stripped AR-15 Lower Receiver - Ambidextrous Controls - Flared Magwell - Anodized Black - MK2AL
Griffin Armament
$189.99
Aero Precision Inc M4E1 223/5.56mm AR-15 Stripped Lower Receiver
Aero Precision
$108.50
Geissele Automatics Super Duty Stripped AR-15 Lower Receiver - Desert Dirt
Geissele Automatics
$200.00
AERO PRECISION AR-15 Gen 2 Stripped Lower Receiver - Matte Black
Aero Precision
$89.99
LMT MARS-L Ambidextrous AR-15 Stripped Lower Receiver
LMT
$342.00
PSA AR-15 "Stealth" Stripped Lower Receiver
Palmetto State Armory
$69.99
PSA AR-15 Lower Safe/Fire - 1728
Palmetto State Armory
$64.99
PSA AR-15 M4 Carbine Stripped Lower Receiver
Palmetto State Armory
$79.99
Builds Using This Part
No builds yet — be the first to use this part.
Related Guides
Guide
AR-10 Receiver Patterns: DPMS vs. Armalite Compatibility
The AR-10 has two incompatible receiver patterns — DPMS and Armalite — that look similar but do not share parts. This guide explains the differences and how to buy correctly.
6 min read
Guide
The AR-10 Platform: What It Is and How It Differs from the AR-15
A practical overview of the AR-10 — its origins, how it differs from the AR-15, available calibers, and when it makes more sense than a standard AR-15 build.
6 min read
Guide
AR-15 Components: A Complete Reference Guide
A comprehensive overview of every major component in an AR-15 build—including what's inside bolt carrier groups and parts kits—organized by assembly for new builders.
12 min read