S&W M&P Piston Semi Auto AR-15 Upper Receiver .223 Rem/5.56 NATO 16" Barrel Chrome Lined Flat Top Black 812006

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These piston driven AR-15 upper assemblies from Smith & Wesson are a sure way to increase the reliability of your AR-15 rifle. The standard design easily drops onto any standard AR-15 lower receiver group. With a chrome lined bore, gas key, bolt carrier, and chamber, these uppers can handle even the harshest conditions. A polymer handguard, complete with heatshields, provides a sure grip.

Specifications and Features:
5.56 NATO chamber (accepts .223 Remington)
16" Barrel
Plastic handguards
Adjustable gas port
1 Piece bolt carrier