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Mfg Item #: 91823
Built on the versatile Bushmaster modular MSR upper platform, this Patrolman's Carbine (M4 A3) upper receiver assembly has a 16" M4-profile barrel made of 4150 chrome-moly-vanadium steel with hard chrome-lining in both bore and chamber for extended barrel life. It has an A2 birdcage-type flash hider, and front sight post with bayonet lug. The flattop receiver features integral brass deflectors and a black hard anodized finish. Each bolt carrier assembly is factory headspaced, proofed, test fired, and ready to use on your on existing MSR-type lower receiver.
| Type | Complete |
|---|---|
| Series | Complete Upper with Bolt |
| Sights | Flip Up |
| Caliber | 223 Remington/5.56 NATO |
| Handguards | Carbine Length |
| Barrel Finish | Black |
| Barrel Length | 16" |
| Barrel Material | 4150 Chrome Moly Vanadium Steel |
| Handguard Finish | Black |
| Barrel Description | Chrome-Lined |
| Barrel Length Range | 16.00" to 17.99" |
| Receiver Description | A3 |