Kansas Gunshop is a Wichita, KS-based retailer specializing in modern sporting rifles and firearms. The Alex PRO Firearms APF 15 .450 Bushmaster Rifle with Adjustable Stock is a robust, large-bore AR-platform rifle designed for significant stopping power. Its adjustable stock offers adaptability for various shooters and shooting scenarios. Available now for $2299.00.
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 Alex PRO Firearms APF 15 .450 Bushmaster Rifle?
| Product Type | AR-15 Platform Rifle |
|---|---|
| Caliber | .450 Bushmaster |
| Barrel Length | Typically 16 inches (verify specific model) |
| Barrel Material | 416R Stainless Steel or 4150 Chrome Moly Vanadium (verify specific model) |
| Twist Rate | 1:24 or 1:20 (verify specific model) |
| Gas System | Mid-Length or Carbine Length Direct Impingement |
| Stock | Adjustable Carbine Stock |
| Handguard | M-LOK Free Float Handguard |
| Trigger | Mil-Spec or Enhanced Mil-Spec |
| Magazine Capacity | 5-round or 7-round (depending on state/local laws and magazine type) |
| Finish | Black Anodized |
| Overall Length | Approximately 33-36 inches (adjustable) |
| Weight (Unloaded) | Approx. 7.5 – 8.5 lbs |
| Manufacturing | Alex Pro Firearms (APF) |
| Country of Origin | USA |
| Condition | New |
| SKU | APF-450B-AR15-ADJ |
What are the key features of the APF 15 .450 Bushmaster Rifle?
- .450 Bushmaster Caliber: This rifle is chambered in .450 Bushmaster, a caliber known for its significant energy transfer, making it suitable for large game hunting and effective for short to medium range applications.
- AR-15 Platform: Built on the familiar and modular AR-15 platform, it offers a wide range of aftermarket customization options and ergonomic familiarity for those accustomed to AR-style rifles.
- Adjustable Stock: The adjustable carbine stock allows for quick length-of-pull adjustments, accommodating different shooter sizes, clothing, or shooting positions. This adaptability is practical for various field conditions.
- Free-Float Handguard: Equipped with a free-float handguard, typically M-LOK compatible, which enhances accuracy by preventing pressure on the barrel and allows for easy attachment of accessories like lights, lasers, and bipods.
- Direct Impingement Gas System: Utilizes a direct impingement gas system, a common and proven method for AR-style rifles, contributing to a lighter rifle and a familiar recoil impulse.
- Reliable Construction: APF rifles are assembled in the USA, focusing on functional reliability and component integration for consistent performance.
Who is the Alex PRO Firearms APF 15 .450 Bushmaster Rifle for?
This rifle is a specialized tool. It’s not a plinker, it’s built for purpose.
Buy it if:
- ✅ You hunt large game such as deer, elk, or bear in states where straight-wall cartridges are required or preferred.
- ✅ You are looking for an AR-platform rifle with substantial stopping power for brush hunting or in areas with dense cover.
- ✅ You appreciate the modularity and ergonomics of the AR-15 platform but need a larger caliber.
- ✅ You want a rifle capable of delivering significant energy at closer ranges (under 200 yards).
- ✅ You are an experienced shooter looking to expand your collection with a dedicated big-bore AR.
Skip it if:
- ❌ You are primarily looking for a low-recoil rifle for casual target shooting or plinking. The .450 Bushmaster has a notable recoil impulse.
- ❌ Your primary use case involves long-range precision shooting (beyond 200-250 yards), where other calibers might offer flatter trajectories.
- ❌ You are on a tight budget for ammunition; .450 Bushmaster rounds are generally more expensive than common rifle calibers like .223/5.56.
- ❌ You prefer a traditional bolt-action or lever-action rifle for hunting. See our Rifles category for alternatives.
What are the pros and cons of the APF 15 .450 Bushmaster?
- ✅ Significant Knockdown Power: The .450 Bushmaster cartridge delivers immense energy, making it highly effective for large game hunting.
- ✅ AR-15 Familiarity: Operators familiar with the AR-15 platform will find the controls and ergonomics intuitive.
- ✅ Adjustable Stock Versatility: The adjustable stock allows for a custom fit, which can improve shooting comfort and accuracy for different users or situations.
- ✅ Modular Handguard: The free-float M-LOK handguard provides ample space for mounting accessories, enhancing the rifle’s utility.
- ✅ Straight-Wall Compliant: Ideal for hunting in states with straight-wall cartridge regulations, expanding hunting opportunities.
- ❌ Recoil: The .450 Bushmaster has a stout recoil, which might be a consideration for recoil-sensitive shooters or extended range sessions.
- ❌ Ammunition Cost and Availability: Ammunition for .450 Bushmaster can be more expensive and less widely available than more common calibers.
- ❌ Limited Range: While powerful, the .450 Bushmaster is not designed for extreme long-range shooting, with its trajectory dropping off significantly past 200-250 yards. For longer range, consider a .308 AR platform.
How does the APF 15 .450 Bushmaster compare to other big-bore ARs?
| Feature | Alex PRO Firearms APF 15 .450 Bushmaster | Budget .450 Bushmaster AR (e.g., Palmetto State Armory) | Premium .450 Bushmaster AR (e.g., Bushmaster XM15 .450 Bushmaster) |
|---|---|---|---|
| Material | Forged 7075-T6 Aluminum Receivers, 416R or 4150 Barrel | Forged 7075-T6 Aluminum Receivers, 4150 Chrome Moly Vanadium Barrel | Forged 7075-T6 Aluminum Receivers, 4150 Chrome Moly Vanadium Barrel |
| Quality | Solid, American-made assembly with attention to functional components. Good value for the build. | Entry-level, functional. Components can vary, sometimes requiring upgrades for optimal performance. | Higher-tier components, often with enhanced triggers, barrels, and furniture. Generally more refined. |
| Compatibility | Standard AR-15 parts compatibility for most accessories, specific .450 Bushmaster upper/magazine. | Standard AR-15 parts compatibility, specific .450 Bushmaster upper/magazine. | Standard AR-15 parts compatibility, specific .450 Bushmaster upper/magazine. |
| Shipping | Ships from Wichita, KS via FFL transfer. | Ships from manufacturer/retailer via FFL transfer. | Ships from manufacturer/retailer via FFL transfer. |
| Lifespan/Durability | Expected long lifespan with proper maintenance. Components are robust for the caliber. | Adequate lifespan for recreational use. Heavy use might show wear faster on some components. | Designed for extended heavy use, often with enhanced coatings and materials for durability. |
| Price | $2299.00 | ~$700-$1000 | ~$1500-$2000+ |
Frequently Asked Questions about the APF 15 .450 Bushmaster Rifle
Is the .450 Bushmaster a good hunting cartridge?
Yes, the .450 Bushmaster is an excellent cartridge for hunting medium to large game, particularly at closer ranges (under 200 yards). Its heavy bullet and high energy transfer make it very effective for deer, bear, and hogs.
What kind of recoil does a .450 Bushmaster AR-15 have?
The .450 Bushmaster in an AR-15 platform has a noticeable recoil, comparable to a 12-gauge shotgun or a .30-06 rifle. It’s manageable for most shooters, especially with an adjustable stock allowing for proper fit, but it’s not a light-recoiling round.
Can I use standard AR-15 magazines with .450 Bushmaster?
Yes, .450 Bushmaster cartridges can often be fed from modified standard AR-15 magazines. However, specific .450 Bushmaster magazines are available and generally recommended for optimal feeding reliability due to the larger diameter of the cartridge.
Is the APF 15 .450 Bushmaster legal in states with straight-wall cartridge restrictions?
Generally, yes. The .450 Bushmaster is a straight-wall cartridge, which makes it legal for hunting in many states that restrict bottleneck cartridges for deer hunting. Always verify local and state regulations before purchasing and hunting.
Where can I buy rifles online?
You can buy rifles online, including the Alex PRO Firearms APF 15 .450 Bushmaster Rifle, through licensed FFL dealers like Kansas Gunshop (kansas-gunshop.com). The rifle will be shipped to your local FFL for transfer according to all federal, state, and local laws.
What kind of accuracy can I expect from the APF 15 .450 Bushmaster?
With quality ammunition and a competent shooter, you can generally expect 1.5 to 2.5 MOA (Minute of Angle) accuracy at 100 yards from a .450 Bushmaster AR-15. This is sufficient for hunting applications where shots are typically taken at closer ranges.
What accessories are recommended for the APF 15 .450 Bushmaster?
Given its hunting application, a quality optic (red dot or low-power variable scope), a comfortable sling, and extra magazines are highly recommended. A bipod or shooting sticks can also be beneficial for stability in the field.
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Last updated: April 2026
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