Finished my CQB SHTF build !!

KevinB mentioned on some other thread a while back that his 10.5" was good out to a few hundred.. but I'll let him chime in if he reads this!
 
I guess loads vary so wildly that there is no one single answer... obviously it depends on barrel length and twist and especially the ammo you choose to shoot.

I'd be curious to know what's most effective for a 1/9 10.5-11.5" barreled AR15.
 
greentips said:
The real guns for the SHTF....


vltor58.jpg
Click to expand...

A-Straight! That would be my weapon of choice.:D
 
darko said:
Are you saying it won't put somebody down beyond 50m? Im genuinely curious because I have an 11.5" myself and always wonder just how "effective" it is at certain ranges.
Click to expand...

"The primary wounding mechanism for .223 and 5.56 ammunition is fragmentation. The primary factor in fragmentation is velocity. The primary velocity booster is barrel length. 11.5" barrels barely bring milspec (NATO) 55 grain FMJ to 2700 fps (the critical fragmentation threshold for many FMJ .223 rounds). Accordingly, any distance at all drops the rounds below fragmentation velocity. 10" barrels are unlikely to ever get rounds above fragmentation velocity at all.
Soft point and hollow point rounds lack penetration even at high velocity. Because they are not prone to yawing or fragmentation lower velocities will not increase penetration as with many fragmenting rounds."
(http://www.ammo-oracle.com/body.htm)

That's not to say a hit to the Central Nervous System (brain,spinal column) with any round at sufficent velocity to disrupt or cause crushing damage wouldn't get the job done but that's a hard shot to guarentee.
 
KX3's do not belong on a fighting gun...

WRT barrel length -- everything is a compromise, you need to find the best compromise for your needs.
Frag/Yaw from velocity is an issue -- but hits are much more important... If I can get hits with a 10.5 due to manuverability, its much better than a 14.5 or 16" gun I can't engage with.

More to follow in a few hours ;)
 
The KX3 is known to become quite toasty and burnt up inside with sustained use.

I wouldn't put it on a gun I use a lot!

wrt = with respect to
 
10.5 upper...you need some of these :D

223_REM_TAP_FPD_HP321.jpg



75gr. TAP Hornady

Or Blackhills 77grain Sierra
 
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