Got a good offer on a m&p 9, should I take it?

[Confusedacorn]

Well I ended up buying the m&p9 today. Talked them down on the price to $475 and got a free box of ammo and range session (so basically about $450). No failures or jams in ~150 rounds, really nice recoil however my accuracy wasn't so great due to my new gun excitement and a little too much coffee this morning haha.

Turns out it has Trijicon night sights, a SureFire x300 taclight, a Raven fitted kydex holster, and of course the trigger system. So far I'm pretty happy with it, gunna take it out again tomorrow to dump another 50 or so rounds doe range and see if I can tighten up my groups.

Just out of curiousity, my barrel has 1 dimple on the underside does that mean it has the 1/10 twist vs the first gen 1/18 twist?

 

[Llando88]

Just out of curiousity, my barrel has 1 dimple on the underside does that mean it has the 1/10 twist vs the first gen 1/18 twist?

Yes, probably:

Pic of the Day: New Production M&P Barrel | Modern Service Weapons

 

[Rastoff]

Just out of curiousity, my barrel has 1 dimple on the underside does that mean it has the 1/10 twist vs the first gen 1/18 twist?

Yes, probably:

Pic of the Day: New Production M&P Barrel | Modern Service Weapons

I wish that internet myth would just go away. Alas, once on the net it will be there forever. According to S&W, the dimples are there to indicate which machine was used during the manufacturing process.

I don't remember how old your barrel is, but the only way to know for sure is to measure the twist rate. Do you know how?

 

[Confusedacorn]

I have no idea how to measure the twist rate. Do I need any special tools or anything or just pick a rifling groove Mark the beginning on a piece of paper and follow it to the tip of the barrel and place another mark?

 

[Rastoff]

It's not that hard. Use a cleaning rod with a brush on it. Put the rod in and make a mark on it so you know where it starts. Then push the rod/brush through allowing the brush to follow the grooves. Watch the mark as the rod/brush goes the length of the barrel.

If the barrel is a 1:10 twist, the rod will make about 1/2 revolution. If it doesn't make that turn, it's the other twist rate.


See, easy.