Ar-15 question

[45 ACP]

Hi everybody,

I recently aquired my first ar (bushmaster a2) and started conducting a few tests such as pulling the charging handle and chambering a round to make sure everything works fine, when I unloaded the gun I noticed that the primer had been very slightly struck by the firing pin, I then took another round and did it again (always pointing the rifle in a safe direction just in case), when I extracted the round, same story............is this normal with ar rifles?

Im really oncerned about this matter because it could be a problem with the bolt carrier or bolt, I don't know............any input will be appreciated.

[Stooperzero]

Completely normal.

[ungawa]

Completely normal.

What he said ^

[Shawn.L]

^^^^^
what they said.

the firing pin floats freely, so it will knock the primer when a round is chambered. It doesnt have enough mass to fire it though.

there are some more considerations such as hard or soft primers, ect.... but its normal what you are seeing.

It would be advisable to save the function checking with live ammo for the range.

[ReconLdr]

^^^^^
what they said.

the firing pin floats freely, so it will knock the primer when a round is chambered. It doesnt have enough mass to fire it though.

there are some more considerations such as hard or soft primers, ect.... but its normal what you are seeing.

It would be advisable to save the function checking with live ammo for the range.

^^^^^What he said^^^^

[45 ACP]

Thank you all for your prompt answers, Im calm now that I know everything is working fine with my rifle specially after having invested so much money into all the magpul furniture, i'll post pictures soon......... oh!, and excuse my ignorance, although I own two aks (amd-65 & yugo m70 uf), this is my first ar platform and don't know much about them, after all, we're all here to learn.

[Wiley-X]

It doesnt have enough mass to fire it though.

Bill Nye asked me to pass on that the firing pin's mass doesn't change, barring the relativistic effects, what the firing pin lacks is enough energy to fire the cartridge.

[Shawn.L]

Bill Nye asked me to pass on that the firing pin's mass doesn't change, barring the relativistic effects, what the firing pin lacks is enough energy to fire the cartridge.

Anything that moves has kinetic energy (called KE).
The amount of kinetic energy which an object has
depends on how fast it is moving (its velocity).
It also depends on the mass of the object.

Kinetic Energy = 0·5 x mass x velocity2

this is usually written as KE = ½mv2

This equation is important!

For example, an object of mass 500kg has a velocity of 12 m/s,
what is its kinetic energy?

KE = 0·5 x 500 x 122
= 36,000J.


http://www.gcsescience.com/pen28-kinetic-energy.htm

[dbldeuce5]

Anything that moves has kinetic energy (called KE).
The amount of kinetic energy which an object has
depends on how fast it is moving (its velocity).
It also depends on the mass of the object.

Kinetic Energy = 0·5 x mass x velocity2

this is usually written as KE = ½mv2

This equation is important!

For example, an object of mass 500kg has a velocity of 12 m/s,
what is its kinetic energy?

KE = 0·5 x 500 x 122
= 36,000J.


http://www.gcsescience.com/pen28-kinetic-energy.htm

Wow! I knew I should have paid more attention in science class!

[twoguns]

if you hand-load your ammo (reloads) you should seek out military grade primers. They are a little thicker and less prone to "slam-fires".