468

468

What does 468 stand for?

At the time, it was known as the Year of the Consulship of Anthemius without colleague (or, less frequently, year 1221 Ab urbe condita ). The denomination 468 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

What does M468 stand for?

The Barrett M468 is a variant of the M4 Carbine, rechambered for a heavier and larger 6.8mm bullet for increased terminal performance. The designation of M468 stands for an M4 carbine chambered for the 6.8mm SPC cartridge. It was an attempt to create an optimal Special Operations close-to-medium range carbine for Close Quarter Battle (CQB).

What kind of carbine is the Barrett M468?

Barrett Firearms M468 6.8 SPC Carbine:Designed to accommodate the new 6.8 SPC cartridge, this weapons shooting accuracy and velocity make it ideal for tactical applications. Policemag. ^ a b c Lewis, Jack; Campbell, Robert K.; Steele, David E. (2007).

What is the origin of the ARRL number 468?

The number 468 first appeared in the 1929 ARRL Handbook. For this article, N0AX did a number of simulations of a 20m dipole at various heights, ranging from 1/8 wavelength to 2 wavelengths.

Why is the half wavelength of a radio wave 468?

If you do the math, a half-wavelength is actually 492/f, so where did the number 468 come from? The explanation most often given these days is that a radio wave travels about 5% slower in wire than it does in free space, so the distance that a radio wave would travel in a wire is about 5% less than it would travel in free space.

What is the difference between the Barrett M468 and M4?

The Barrett M468 is a variant of the M4 Carbine, rechambered for a heavier and larger 6.8mm bullet for increased terminal performance. The designation of M468 stands for an M4 carbine chambered for the 6.8mm SPC cartridge.

What kind of carbine is the M468 carbine?

Barrett’s M468 carbine chambered for the new 6.8 SPC is all business. From its forged receivers to its tough military parkerized finish to the rail handguards it wears, every feature of the M468 is well thought out and includes the proven attributes that experienced operators ask for.

What kind of magazine does a Barrett M468 have?

The civilian-market version of the M468 shipped with a soft carrying case, cleaning kit, sight wrench, and two 25-round PRI magazines. The Barrett M468 rifle employed the same direct gas impingement system as the M4.

What is the difference between the M468 and m468a1?

The standard M468 uses a regular forend whereas the M468A1 comes with an ARMS Selective Integrated Rail (SIR) accessory rail system with integral flat-top Picatinny Rail scope mount and 4-position forend, and a detachable ARMS Back Up Iron Sight folding rear iron sight.

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