Windham 450 Thumper 450 Bushmaster AR Pistol with Brace
About this product
Kansas Gunshop is a Wichita, KS-based retailer specializing in firearms and accessories. The Windham 450 Thumper 450 Bushmaster AR Pistol with Brace is a robust AR-style pistol chambered in .450 Bushmaster, designed for significant stopping power in a compact package. Its stabilizing brace offers enhanced control. Available now for $899.00.
Reviewed by Derek, Owner & FFL Holder at Kansas Gunshop. Kansas-licensed FFL dealer since 2008, NRA Range Safety Officer.
Last updated: April 2026
What are the specifications of the Windham 450 Thumper?
| Product Type | AR Pistol with Stabilizing Brace |
|---|---|
| Material | 7075 T6 Aircraft Aluminum (Receivers), 4150 Chrome Moly Vanadium 11595E Steel (Barrel) |
| Manufacturing | Windham Weaponry, Made in USA |
| Finish | Hardcoat Anodized Black (Receivers), Nitride (Barrel) |
| Hardness/Quality | Mil-Spec Components |
| Compatibility | Standard AR-15 Lower Parts Kits, .450 Bushmaster Magazines |
| Installation/Usage | Ready to use out of the box |
| Weight | Approximately 6.5 lbs (unloaded) |
| Dimensions | Overall Length: Approximately 26 inches (brace collapsed) |
| Country of Origin | USA |
| Condition | New |
| SKU | R16SFST-450M-P |
Why choose the Windham 450 Thumper 450 Bushmaster AR Pistol?
The Windham 450 Thumper 450 Bushmaster AR Pistol with Brace brings serious power in a compact form. Chambered in .450 Bushmaster, this isn't your average plinking round. This cartridge delivers substantial energy, making it suitable for hunting larger game like deer and hogs, especially in states with straight-wall cartridge requirements for hunting. The pistol configuration, combined with the stabilizing brace, offers a shorter overall length than a traditional rifle, which can be beneficial for maneuvering in tight spaces, whether in a hunting blind or for home defense applications.
Windham Weaponry has a reputation for building reliable AR platforms, and this .450 Bushmaster pistol is no exception. The direct impingement gas system is tried and true, and the components are built to handle the recoil and pressure of the .450 Bushmaster cartridge. The shorter barrel length, typically around 9 to 10 inches, while reducing velocity slightly compared to a rifle-length barrel, still provides ample power for its intended uses. For those looking for a hard-hitting, maneuverable firearm that uses a modern sporting rifle platform, this Windham 450 Thumper is a solid option.
Who is the Windham 450 Thumper AR Pistol for?
- Buy it if:
- You need a compact, powerful firearm for hunting deer or hogs in straight-wall cartridge states like Kansas.
- You are looking for a hard-hitting AR-style platform for home defense where maneuverability is key.
- You appreciate the build quality and reliability associated with Windham Weaponry firearms.
- You want an AR pistol chambered in a large-bore cartridge for increased stopping power.
- You have experience with AR platforms and are comfortable with the recoil of .450 Bushmaster.
- Skip it if:
- You are sensitive to recoil; the .450 Bushmaster in a pistol platform can be stout. See our AR-15 Rifles for lighter recoiling options.
- You are primarily looking for a target shooting firearm for high-volume, low-cost ammunition.
- You prefer a traditional rifle length for increased velocity and sight radius.
- You are unfamiliar with AR platform maintenance or the specific considerations for large-bore ARs.
What are the advantages and disadvantages of this AR pistol?
- ✅ Significant Stopping Power: The .450 Bushmaster cartridge delivers substantial energy, making it effective for hunting medium to large game.
- ✅ Compact and Maneuverable: The pistol configuration and stabilizing brace allow for easier handling in confined spaces, such as hunting blinds or for home defense.
- ✅ AR Platform Familiarity: For those accustomed to the AR-15 platform, the controls and operation will be familiar.
- ✅ Quality Construction: Windham Weaponry is known for building durable and reliable firearms.
- ✅ Straight-Wall Legal: Meets hunting regulations in many states that require straight-wall cartridges for deer hunting.
- ❌ Recoil: The .450 Bushmaster in a pistol can produce noticeable recoil, especially for new shooters.
- ❌ Ammunition Cost: .450 Bushmaster ammunition is generally more expensive than common rifle cartridges.
- ❌ Muzzle Blast: Shorter barrels often result in a more pronounced muzzle flash and report.
How does the Windham 450 Thumper compare to other AR pistols?
| Feature | Windham 450 Thumper | Budget AR Pistol (e.g., PSA AR-15 Pistol) | Premium AR Pistol (e.g., BCM Recce-11 KMR-A) |
|---|---|---|---|
| Material | 7075 T6 Aluminum, 4150 Steel | 7075 T6 Aluminum, 4150 Steel | 7075 T6 Aluminum, BCM Proprietary Steel |
| Quality | Good, Mil-Spec components | Entry-level to good, depending on model | Excellent, high-end components |
| Compatibility | AR-15 standard, .450 Bushmaster specific | AR-15 standard, 5.56/.223 specific | AR-15 standard, 5.56/.223 specific |
| Shipping | Same-day from Wichita, KS | Varies by retailer | Varies by retailer |
| Lifespan/Durability | Long, built for heavy use | Good for recreational use | Very long, designed for hard use |
| Price | $899.00 | ~$500-$700 | ~$1200-$1800+ |
Frequently Asked Questions about AR Pistols
What is a stabilizing brace on an AR pistol?
A stabilizing brace, often called a pistol brace, is an accessory designed to aid in the one-handed firing of an AR pistol. It typically attaches to the rear of the receiver extension and provides a surface that can be braced against the shooter's forearm. It is distinct from a stock, which is designed to be shouldered.
Is the .450 Bushmaster cartridge suitable for hunting in Kansas?
Yes, the .450 Bushmaster is a straight-wall cartridge, which makes it legal for deer hunting in Kansas during the firearms season in specific zones. Its substantial power makes it effective for deer and other medium to large game.
What kind of recoil can I expect from a .450 Bushmaster AR pistol?
The .450 Bushmaster cartridge produces significant recoil, especially in a lighter AR pistol platform. It will be more pronounced than a 5.56/.223 AR pistol, but manageable for experienced shooters. Proper stance and grip are important.
Can I put a stock on this Windham AR pistol?
Converting an AR pistol to a rifle by attaching a stock without proper NFA registration could result in the creation of an unregistered Short-Barreled Rifle (SBR), which is illegal. Always consult with a qualified FFL and understand federal and state laws before modifying any firearm.
Where can I buy AR pistols online?
You can buy AR pistols online, including the Windham 450 Thumper, right here at Kansas Gunshop (kansas-gunshop.com). We process the order and ship it to your local FFL dealer for transfer, adhering to all federal and state regulations.
What is the effective range of a .450 Bushmaster AR pistol for hunting?
While the .450 Bushmaster is powerful, the shorter barrel of an AR pistol will reduce its effective range compared to a rifle-length barrel. For hunting, an effective range of 100-150 yards is generally considered practical, depending on ammunition and shooter proficiency.
What maintenance is required for a .450 Bushmaster AR pistol?
Standard AR platform cleaning and lubrication practices apply. Due to the larger cartridge and potential for increased fouling, regular cleaning of the bore, bolt carrier group, and gas system is recommended to ensure reliable operation.
Browse more: Ar 15 Rifles | Full Shop