BazzaMcKenzie wrote:
DaveB78 wrote:
In case anyone is intersted, I just bought a new AR 15 this morning...16 in barrel 1 in 7 twist, BUIS, EoTech 552, rail system and a goodly supply of ammo...the entire transaction was completed in less than half an hour...that is freedom.

5.56/223 Rem? Do they still come in 7.62/308?
M-16 / AR-15 are 5.65 mm some have been mod for 9 mm etc but a 308 version would
be based on completely different parts I think it was AR-10?
A 1 in 7 twist would make the bullet not tumble. That a military barrel design for heavy
AP ammo. 16" barrel thats the carbine with a colapsable stock. Very compact and lite.
Oh the ideal twist is 1 in 14 for a 5.65 mm for non-AP ammo for kill power. But in cold
weather 1 in 12 is more stable so most non-AP barrels have been 1 in 12.
Oh I read a book by Eugene Stoner the designer of the AR-15/M-16. It got a bad rap
in Vietnam. When it was first issued soliders were not given cleaning kits for it!
Machine those slow twist barrels will only stabilize very light bullets...the 55gr. and lighter bullets that were originally made for the 5.56 in its 20 inch configuration..since the shorter barrel versions have come about bullets have become heavier and twists ave become faster...the 1 in 7 is std. on all military issue M4s and variants and 1in 8 is used in the SPR.