Do you TRULY want a good AR-15 or do you want crap?

[Trigger Time]

I thought I saw [name deleted to protect the identity of INGO member] at the range in a ghillie suit....but it was just chest hair.

I felt I was being watched.

 

[CampingJosh]

I thought I saw [name deleted to protect the identity of INGO member] at the range in a ghillie suit....but it was just chest hair.

I thought at first that I recognized him, but there's too much hair on the top of the head to be [name deleted to protect the identity of INGO member].

 

[Expat]

JetGirl?

 

[rhino]

Why 30 rounds?

Because it's the Golden Rule for sample size: samples less than 30 have enough sampling error that the conclusive power is often invalid. People familiar with inferential stats know this general rule (which is NOT the same as the true statistical "power" of a sample, which is not worth belaboring here). The approximation of group dispersion as a "normal" distribution seems reasonable to me.

Hmmm. Wouldn't the sample size of 30 be more appropriately applied to the number of groups shot rather than the number shot in a given group?

The individual shots in a group would not comprise a measurement or datum, but a group size formed by that set of shots forms one datum in your sample.

How many shots should be included in a group is still open for debate.

 

[JeepHammer]

Deleted, no point in kicking a dead horse...

 

[Ggreen]

Deleted, no point in kicking a dead horse...

This horse has been dead for a while and is bloated, we are all taking turns kicking it until it pops like a piñata.

 

[Hohn]

Hmmm. Wouldn't the sample size of 30 be more appropriately applied to the number of groups shot rather than the number shot in a given group?

The individual shots in a group would not comprise a measurement or datum, but a group size formed by that set of shots forms one datum in your sample.

How many shots should be included in a group is still open for debate.

There's no statistical difference between shooting a single 30 round group and 6 five round groups because it basically boils down to math: the average of 30 numbers is the same as the average of the 6 averages of random groups of five chosen from the 30 numbers.

This is relevant because we are about the absolute value of the departure of the POI from the POA, not the error in a particular direction.

This assumption would likely not be appropriate for situations like shooting outdoors in the wind at longer distance, where the windage dispersion will have a different variability than the elevation. But for general shorter range work or indoors, you can assume reasonably shot distribution that is circular and not elliptical. In other words, you can merge X and Y into a radial figure rather than treat them as individual vector components.

 

[NKBJ]

I don't think the better 2/3's has ever needed three rounds to hit anything.

 

[farmerdan]

Okay guys I've got two Ingo lowers and two Larue MBT triggers. I've have two high end AR's so I'm wanting to build a 300 blackout.
Palmeto State has a complete 16" upper, it's pistol length gas system with the gen 3 13" rail for 259.00 free shipping . Includes the bolt carrier and mpi bolt. You think it's worth a shot, money really isn't a problem I just don't want to stink a bunch in a 300 upper if I don't like it. It'll have an A2 stock and either be a range gun or possibly a little bit of deer hunting. Honest opinions won't hurt my feelings so what do you guys think about PSA quality lately. Thanks for any help , Dan

 

[Hohn]

Coworker bought a 300blk PSA upper this Spring and says it’s gtg.

 

[CENTURIATOR]

Here is my KAC SR-15 with VCOG optic.

 

[Trigger Time]

Here is my KAC SR-15 with VCOG optic.

This is a quality post

 

[Hohn]

I believe that qualifies as "quality" in anyone's book. Dang.

 

[Vigilant]

Meh, my PSA, Anderson, DPMS, build is just as gooder, and only cost $350. You're silly for paying more.

 

[KJQ6945]

Meh, my PSA, Anderson, DPMS, build is just as gooder, and only cost $350. You're silly for paying more.

In true INGO fashion. Well done sir!

 

[Trigger Time]

Yep, shots fired. They wont even know who's doing the shooting

 

[ru44mag]

Meh, my PSA, Anderson, DPMS, build is just as gooder, and only cost $350. You're silly for paying more.

 

[Voldemort]

I want crap, and I'll pay bottom dollar to prove it.

 

[Expat]

You can buy ammo with the savings you know.

 

[KJQ6945]

I want crap, and I'll pay bottom dollar to prove it.

QFT!

It's the INGO mantra.