Smith & Wesson M&P15 .300 Whisper

by
posted on September 17, 2012
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
mp15-300-whisper.jpg

Smith & Wesson took one of its most well known designs and paired it with an increasingly popular caliber to create the M&P15 300 Whisper. Though chambered in .300 Whisper, it will also safely fire .300 AAC Blackout.

The 300 Whisper builds upon the brand's established M&P line, offering sub-sonic and supersonic capabilities with consistent performance and accuracy. The 300 Whisper is easy to shoot, accurate and versatile—it's a comfortable fit when hunting, at the range for some recreational shooting or deployed for home protection.

Technical Specifications:

Model: M&P15 300 Whisper
Caliber:
.300 Whisper, .300 AAC Blackout
Capacity:
10 Rounds
Action:
Semi-Auto
Barrel Length:
16"
Barrel Twist:
1 in 7.5" 5R Rifling
Overall Length:
35" Extended/32" Collapsed
Stock:
6 Position CAR
Weight:
6.38 lbs.
Barrel Finish:
Melonite
Receiver Finish:
Realtree APG
MSRP: $1,119

Latest

National Firearm Act
National Firearm Act

150,000 NFA Applications Filed On Day 1 After $0 Tax Stamp Becomes Official

Approximately 150,000 NFA enthusiasts filed their paperwork through ATF’s electronic system in just the first 24 hours of 2026, the first day after the $0 tax stamp for most NFA items became official.

Gun Of The Week: Caracal USA CMP9K

Caracal's CMP9K pistol is based on a design originally produced to replace the aging stock of Heckler & Koch MP5s in United Arab Emirates service.

The Armed Citizen® Jan. 9, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

Preview: Roundhouse Provisions Ultimate Campout Kit

Founded by Chuck Norris (yes, that Chuck Norris), Roundhouse Provisions is a company that produces emergency foodstuffs designed to be quickly and simply prepared that will stay fresh for years.

New For 2026: Taurus TX9 Pistol

Taurus launches the TX9 family of striker-fired, polymer-frame pistols, adding to its popular TX series of handguns.

Heavy Browning At War: Combat Tales Of The Browning M1917 Machine Gun

For the first half of the 20th century, one of the most important firearms in the U.S. military arsenal was the water-cooled Browning M1917, known to gunners and infantrymen alike as the "Heavy Browning."

Interests



Get the best of American Rifleman delivered to your inbox.