M&P 15 Sport: Replacing Stock

[22Shooter]

I just purchased an M&P 15 Sport and I'm thinking about aftermarket upgrades. Now, I'm new to AR's and didn't know there are piston driven and direct impingement. I'm looking at an NEA CCS PDW stock, but it says it won't work with Gas-Piston Uppers. So my question is...what is an M&P 15 Sport?

 

[LAFD80]

Direct Impingement just like the M&P 10. You should be good to go but not sure why it wont work this gas piston. A stock is a stock? You might want to call their customer support.

 

[BradMacc82]

Direct Impingement just like the M&P 10. You should be good to go but not sure why it wont work this gas piston. A stock is a stock? You might want to call their customer support.

Because most gas-piston conversions use a modified BCG.

M&P-15 is direct impingement, you're G2G OP.

 

[22Shooter]

Awesome, thank you guys!

 

[ScottR]

Because most gas-piston conversions use a modified BCG.

M&P-15 is direct impingement, you're G2G OP.

Not entirely true, they did make a piston gun. it's discontinued but important to note.

http://www.smith-wesson.com/webapp/...57905_757896_757896_ProductDisplayErrorView_Y

 

[Robert1955]

Just watch out for flying springs when you take it appart

 

[BradMacc82]

Not entirely true, they did make a piston gun. it's discontinued but important to note.

http://www.smith-wesson.com/webapp/...57905_757896_757896_ProductDisplayErrorView_Y

Looks like an Adams Arms setup, which (IIRC) uses a 1-piece bolt carrier group (no gas key, but a flat that the op-rod acts directly upon).

There may be a GP conversion that uses a standard BCG (that means the gas-key too), but I haven't seen one yet that does.