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Sig Sauer M400 Elite Upper Receiver (No BCG/CH) - 16" 5.56mm NATO, Romeo4A

Sig Sauer M400 Elite Upper Receiver (No BCG/CH) - 16" 5.56mm NATO. Includes Romeo4A (SOR41001).
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Now available from SIG SAUER. SIGM400 16" Enhanced Upper Receiver. Bolt Carrier Group and Charge Handle NOT included. Also included is a Sig Sauer Romeo4A (SOR41001). The Romeo4A is packaged in the box with the upper (wrapped in bubble wrap).
Specs - More Info
Additional Info
SKU UAM400-16B-E-KIT-SOR41001
UPC Code 410000000045
Caliber .223 / 5.56
Manufacturer Sig Sauer
Sights (detailed) Sig Romeo4A Red Dot Sight
Frame Finish Black
Barrel Length (in) 16.0 in
Accessory Rail Yes
Warranty Warranty provided by Sig Sauer. Warranty information is available for Sig Sauer products at https://www.sigsauer.com/support/warranty/.
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Product Questions

Product Questions

Is the hand guard key mod or m-lok?

Referenced product: UAM400-16B-E-KIT

This is an MLOK handguard.

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Is the barrel Crome lined..?

Referenced product: UAM400-16B-E-KIT-SOR52001

The barrel is not chrome lined. According to information we received from Sig Sauer, the barrel is Nitride coated.

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