Q&A for Smith & Wesson M&P 15 Upper Assembly .300 Whisper 16 Inch Threaded Barrel 5R Rifling Quad Rail Flash Suppressor 812012S

Smith & Wesson M&P 15 Upper Assembly .300 Whisper 16 Inch Threaded Barrel 5R Rifling Quad Rail Flash Suppressor 812012S

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Hooty, guest, from CT, United States, asked on February 27, 2021

Will this fit on a Bushmaster AR-15 5.56 lower?

Expert Answer

Answered by Ethan, Gear Expert, from IL, United States, on July 06, 2022

Yes. The Smith & Wesson M&P 15 Upper Assembly is compatible with a Bushmaster AR-15 lower receiver.

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Monte, member, from TX, United States, asked on April 11, 2020

Is the upper suppressor ready or do I need to order a new barrel?

Manufacturer Answer

Answered by Smith and Wesson, Manufacturer from MA, United States, on January 21, 2021

The barrel on this upper is threaded with a 5/8-24 thread pitch. A suppressor can be directly mounted to the barrel.

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Tab, guest, from LA, United States, asked on January 04, 2019

Is the rail a floating rail?

Manufacturer Answer

Answered by Smith and Wesson, Manufacturer from MA, United States, on June 02, 2020

Yes this is equipped with a free floating hand guard.

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Dan, guest, from KY, United States, asked on December 17, 2018

what is difference between 812012s and 812012 manufacturers 's number? 812012s does not appear on S&W website.

Manufacturer Answer

Answered by Smith and Wesson, Manufacturer from MA, United States, on June 02, 2020

We do not offer a sku number of 812012s. Based on the specs, the 812012s is the same as the 812012 on the Optics Planet website.

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Matthew, guest, from MO, United States, asked on February 27, 2018

Does this come with the bolt carrier and everything with it as well or can that swap from the 5.56

Expert Answer

Answered by Jonathan D., Gear Expert, from IL, United States, on April 25, 2018

This upper does include charging handle and BCG. Which can also be swapped with a 5.56 charging handle and BCG.

2 of 2 found the following answer helpful.

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recklesswhisper, member, from CA, United States, asked on November 10, 2017

According to Smith & Wesson, this upper also fires 300 Blackout rounds... correct?

Expert Answer

Answered by Carly R., Gear Expert, from IL, United States, on November 22, 2017

Yes, that is correct.

1 of 2 found the following answer helpful.

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Gene, guest, from CA, United States, asked on October 08, 2017

I have an M&P 15 gun so far. I need an M&P 15 upper assembly. Can I use this in my gun? What is .300 Whisper 16 inch Threaded barrel? Please help.

Expert Answer

Answered by Carly R., Gear Expert, from IL, United States, on October 10, 2017

This is an Upper Assembly for an AR15 or similar type of firearm. The M&P15 is an AR style firearm. The .300 refers to the caliber that the barrel is made for.

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Q&A for Smith & Wesson M&P 15 Upper Assembly .300 Whisper 16 Inch Threaded Barrel 5R Rifling Quad Rail Flash Suppressor 812012S — 7 Questions & 7 Answers

Will this fit on a Bushmaster AR-15 5.56 lower?

Is the upper suppressor ready or do I need to order a new barrel?

Is the rail a floating rail?

what is difference between 812012s and 812012 manufacturers 's number? 812012s does not appear on S&W website.

Does this come with the bolt carrier and everything with it as well or can that swap from the 5.56

According to Smith & Wesson, this upper also fires 300 Blackout rounds... correct?

I have an M&P 15 gun so far. I need an M&P 15 upper assembly. Can I use this in my gun? What is .300 Whisper 16 inch Threaded barrel? Please help.