WMD Guns AR-15 Bolt Assembly - .450 Bushmaster - NiB-X Nickel Boron Finish
or 4 interest-free payments of $20.25 with 
6 Magazines Per Order: Due to extreme volume, we are limiting sales of magazines to 6 per customer order. This applies to individual and bundled magazines. AT3 reserves the right to cancel any order over the 6 magazine limit.
- Free standard shipping on orders $139+ details
- 90-day no-hassle returns policy
- Backed by the WMD Lifetime Warranty! what it covers
Product description
NiB-X Coated Bolt Built for .450 Bushmaster AR-15s
Features
- Complete bolt assembly designed for AR-15 rifles chambered in .450 Bushmaster
- Case-hardened 9310 steel bolt provides strength for repeated locking and unlocking cycles
- Shot-peened construction increases surface strength in the bolt
- Magnetic particle inspected for quality control
- NiB-X nickel boron coating on the bolt and extractor provides a hard, low-friction surface that resists fouling adhesion
- High-performance extractor and ejector components are configured for reliable .450 Bushmaster cycling
- Special O-ring extractor buffer supports positive extraction
- Gas rings are installed as part of the complete bolt assembly
The WMD Guns NiB-X .450 Bushmaster Bolt Assembly provides the caliber-specific bolt components needed for a .450 Bushmaster AR-15 build or replacement. Its case-hardened 9310 steel bolt is shot peened and magnetic particle inspected, while WMD’s NiB-X coating on the bolt and extractor provides a slick, wear-resistant surface that helps reduce fouling adhesion and simplify cleaning. The complete assembly also incorporates upgraded extraction and ejection components suited to the larger .450 Bushmaster cartridge.
Note: This is a complete bolt assembly, not a complete bolt carrier group. Bolt carrier, firing pin, cam pin, and firing pin retaining pin are not included.
Specifications
- Brand: WMD Guns
- Model: NiB-X .450 Bushmaster Bolt Assembly
- MPN: 1-NIBXBA450
- Platform: AR-15
- Caliber: .450 Bushmaster
- Bolt Material: Case-Hardened 9310 Steel
- Bolt Treatment: Shot Peened
- Inspection: Magnetic Particle Inspected
- Finish: NiB-X Nickel Boron
- Color: Nickel
- Extractor: High-Performance, NiB-X Coated
- Extractor Buffer: O-Ring
What’s Included
- 1x WMD Guns NiB-X .450 Bushmaster Bolt Assembly
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Questions & Answers
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Warranty & returns
Backed by the WMD Lifetime Warranty!
WMD Guns Limited Lifetime Warranty on Coatings
- This warranty covers the products of WMD Guns for the failure of the NiB-X coating against chipping, peeling, or wear-through.
- The warranty is of unlimited duration. WMD Guns will recoat the product free of charge including return shipping costs.
- This warranty does not cover customer abuse at any time.
- This express limited warranty is the only warranty on this product. This product is sold “as is” and has no implied warranties of merchantability or fitness for a particular purpose.
- There are no warranties which extend beyond the description on the face hereof.
- WMD Guns shall not be responsible in any manner whatsoever for malfunctioning of the firearm, or for physical injury or property damage, resulting in whole or in part from:
- Criminal or negligent discharge
- Improper or careless handling
- Unauthorized modifications
- Defective, improperly hand-loaded, or reloaded ammunition
- Neglect
- Other influences beyond our direct and immediate control
- This limitation applies regardless of whether liability is asserted on the basis of contract, negligence, or strict liability (including any failure to warn).
- Under no circumstances shall WMD Guns be liable for incidental or consequential damages, such as loss of use of property, commercial loss, and loss of earnings or profits.
For questions regarding our warranty, please contact us at techsupport@wmdguns.com.
Disclaimer: Manufacturer’s warranty is subject to change without prior notice.
90-day no-hassle returns
The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.
If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.