def

[newguy83]

ffe

[The Paper Pimp]

1) 55 or 62gr ammo is fine to use.
2) I would avoid using steel cased ammo and go for Lake City or Winchester White Box ammo (or any other NC brass ammo)
3) your rifle can use both 556 and 223 (if 556 is stamped on the receiver/barrel).
4) ammo has been hovering around the $1/round but has been coming down
5)what kind of defense? 556/223 is not a good home defense round unless you live in a sparsely populated area
6)an accu-wedge. they're cheap and clean up any slop/wobble between upper/lower. maybe an AFG or grip upfront?
7)I use an Otis cleaning kit for mine. avoid any solvents that may damage the finish
8)do: break the barrel in and clean your weapon after each range trip. do: practice safe operating procedures and read the owner's manual
9)practice and become familiar with the AR platform. all piston driven ARs are proprietary (just something to keep in mind).

enjoy

[pluke the 2]

Look no further noob!

http://www.ar15.com/content/page.html?id=493

Welcome!

[pluke the 2]

Basically just look at AR15s FAQs. You'll be reading for a few years before your finished.

[BHPFan]

1) 55 or 62gr ammo is fine to use.
2) I would avoid using steel cased ammo and go for Lake City or Winchester White Box ammo (or any other NC brass ammo)
3) your rifle can use both 556 and 223 (if 556 is stamped on the receiver/barrel).
4) ammo has been hovering around the $1/round but has been coming down
5)what kind of defense? 556/223 is not a good home defense round unless you live in a sparsely populated area
6)an accu-wedge. they're cheap and clean up any slop/wobble between upper/lower. maybe an AFG or grip upfront?
7)I use an Otis cleaning kit for mine. avoid any solvents that may damage the finish
8)do: break the barrel in and clean your weapon after each range trip. do: practice safe operating procedures and read the owner's manual
9)practice and become familiar with the AR platform. all piston driven ARs are proprietary (just something to keep in mind).

enjoy

This.

Also, since we're dealing with a Gas Piston system, I would invest in a PWS buffer tube for AR's (not the model for 416) for carrier tilt prevention. Other than that, the LMT is Good To Go.

[newguy83]

This.

Also, since we're dealing with a Gas Piston system, I would invest in a PWS buffer tube for AR's (not the model for 416) for carrier tilt prevention. Other than that, the LMT is Good To Go.

what do you mean by carrier tilt prevention? how does a pistol system create that?


and how does a PWS buffer tube prevent it?

[DanHuuN]

LMT pistons are trash. You should regift it to me. Lol. I've have a 16" piston and 12" piston pistol. Love them. I've always been a fan of Lmt aside from their weight.

[atolax25]

5)what kind of defense? 556/223 is not a good home defense round unless you live in a sparsely populated area

Isn't 5.56 tested to have lower penetration than 00 buck and pistol caliber rounds?

[The Paper Pimp]

maybe frangible ammo, but I wouldn't use that either. I prefer 00 buck or 357

[newguy83]

1) 55 or 62gr ammo is fine to use.
2) I would avoid using steel cased ammo and go for Lake City or Winchester White Box ammo (or any other NC brass ammo)
3) your rifle can use both 556 and 223 (if 556 is stamped on the receiver/barrel).
4) ammo has been hovering around the $1/round but has been coming down
5)what kind of defense? 556/223 is not a good home defense round unless you live in a sparsely populated area
6)an accu-wedge. they're cheap and clean up any slop/wobble between upper/lower. maybe an AFG or grip upfront?
7)I use an Otis cleaning kit for mine. avoid any solvents that may damage the finish
8)do: break the barrel in and clean your weapon after each range trip. do: practice safe operating procedures and read the owner's manual
9)practice and become familiar with the AR platform. all piston driven ARs are proprietary (just something to keep in mind).

enjoy

so you say 55-62 is fine, but in the ar15.com link it says:

Twist So, rifle barrels have "rifling" in them. These are lands (high spots) and grooves (low spots) which run the length of the barrel. The lands engage a bullet and give it spin as it travels down the barrel, just like a quarterback puts spin on a football. The rate at which the bullet spins is determined by its speed as it travels down the barrel, and the rate at which the lands twist in the barrel. The twist is listed as "one in x" were x is the number of inches the bullet must travel down the barrel to complete a single revolution. Early ARs had 1:12 twist (1 revolution every 12 inches). However, as bullet design evolved, bullets became heavier and longer. Longer, heavier projectiles require faster twists in order to stabilize them. If they do not spin fast enough, they wobble as they go downrange, and you lose accuracy. If all you want to do is launch 45 grain bullets at prairie dogs with your rifle, you can get away with a 1:12 twist. Actually, the 1:12 will probably work up to 55 grain bullets. Most ARs sold these days are 1:9 or faster twists. The 1:9 will stabilize 55-69 grain bullets, and may sometimes stabilize 75s depending on the rifle. A 1:8 or 1:7 will stabilize 77 grain and up bullets. This is important if you intend to shoot at very long ranges where the ballistic coefficient of these bullets is really needed, or if you want to shoot the heavier Black Hills or Hornady ammunition which performs near or at the top for self defense. You need to decide what you want to do with your rifle from the start so you know what twist you will need.

[DanHuuN]

Isn't 5.56 tested to have lower penetration than 00 buck and pistol caliber rounds?

Whoa?!?!?!

[Sniper3142]

so you say 55-62 is fine, but in the ar15.com link it says:

Your LMT MRP can safely and accurately handle just about ANY grain .223/5.56mm round.

From 40 grain TAP all the way up to 80 grain (which is too long to fit into the magazine well is has to be shot one at a time).

A new LMT MRP Piston usually comes with their enhanced bolt carrier which minimizes carrier tilt (so no need to change anything out).

Enjoy

[BHPFan]

what do you mean by carrier tilt prevention? how does a pistol system create that?


and how does a PWS buffer tube prevent it?

Do a google on "gas piston carrier tilt" and you will get a lot of links that can explain it better.

Of course, it's my recommendation and it's your choice to take it or leave it.

[newguy83]

maybe frangible ammo, but I wouldn't use that either. I prefer 00 buck or 357

yea theres no way that 5.56 penetrates more than 00 buck.

[kens]

target 223 and 556 is not 1 dollar a round. even LC 556 is not a dollar a round. If it is, you should not be buying it.