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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.
| Caliber | .223 REMINGTON |
|---|---|
| Barrel Finish | BLACK TEFLON |
| Rate Of Twist | 1:9" |
| Ar15 Accessory | Y |
| Other Features | COMPLETE UPPER W/BOLT 5.56/223 FLAT TOP M4-PROFILE 16" PRE-BAN |
| Barrel Material | 4140 STEEL |
| Barrel Length In Inches | 16 |