S&W M&P15 .300 Whisper/.300 Blackout Upper Assembly 16"

S&W
022188147773
812012
77966
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Specifications and Features:
Manufactured on the M&P15 modern sporting rifle platform
Chambered in .300 Whisper
Will also safely fire .300 AAC Blackout
Very effective, short range round (approx. 200 yards) for hunting deer sized game
Tactical application for the cartridge is for short range target shooting
Cartridge has a very low recoil and muzzle blast
Designed to operate with or without sound suppressor
Barrel threaded to 5/8-24
Feed ramps and gas system optimized to run efficiently with a full range of factory loaded sub sonic and super sonic ammunition, both suppressed and unsuppressed
Barrel twist rate (1 in 7.5) is compatible with a wide variety of bullet weights from 110 to 220+ grains