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18" 450 Bushmaster Upper receiver for your ar15. link to wikipedia info on 450 Bushmaster round
Features:
- 18" 450 Bushmaster barrel, 1:24 Twist
- 5/8-32 Threads
- Steel low profile gas block
- Free Float Handguard
- 7075-t6 Aluminum receiver with Big Bore ejection port
- Dust cover, Forward assist
- Item #: 18-450bushmaster
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