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Are You Outgunned?


Do any of the following describe your situation?

A member of the U. S. Military deployed in harm’s way, walking the streets in a foreign land, carrying an M4 carbine; special operations operator inserted deep in enemy territory with an M4 carbine or 10.5” HK-416; a Coast Guard member conducting ship board inspections or running drug interdiction operations; a U. S. Border Patrol agent tracking down drug cartels on the southern border; a local, state or federal law enforcement officer on patrol with a patrol carbine or a SWAT officer armed with a 10.5” barreled CQB carbine, or an armed citizen defending you family, home or property.

The fact is if you carry or deploy the AR15 / M16 / M4 weapon system chambered in the 223 Remington or 5.56-mm NATO caliber in any barrel length, in the act of defending yourself or others and your potential adversary might be using or carrying the AK-47 chambered in the 7.62 x 39-mm cartridge then the answer is YES, YOU ARE OUTGUNNED in terms of “muzzle energy” and / or “terminal performance”.

The following is a quick reference chart showing the “Muzzle Energy Advantage” of the three main cartridges involved in this discussion; the Kramer Defense 6.8 x 45-mm UCC, the AK-47’s 7.62 x 39-mm, and the 5.56-mm M855 NATO cartridge. The loads used in these comparisons are the standard full metal jacket (military) loadings for each caliber. Civilians and law enforcement agencies can choose ammunition loaded with projectiles that deliver greater performance in the 223 / 5.56 cartridge, but the increase in terminal performance is only minimal.

7.62x39-mm 16” inch barrel AK-47 Advantage over 5.56-mm 20” barreled M16A3/A4 rifle = 9%
7.62x39-mm 16” inch barrel AK-47 Advantage over 5.56-mm 14.5” barreled M4 carbine = 29%
7.62x39-mm 16” inch barrel AK-47 Advantage over 5.56-mm 10.5” barreled carbine = 55%
6.8 x 45-mm UCC 16.0” barrel advantage over 7.62 x 39-mm 16” barrel AK-47 = 10%
6.8 x 45-mm UCC 10.5” barrel advantage over 5.56-mm 10.5” barreled CQB carbine = 45%
6.8 x 45-mm UCC 10.5” barrel advantage over 5.56-mm 14.5” barreled M4 carbine = 20%
6.8 x 45-mm UCC 10.5” barrel advantage over 5.56-mm 20.0” barreled M16A4 rifle = 2%
6.8 x 45-mm UCC 16” barrel advantage over 5.56-mm 14.5” barreled M4 carbine = 42%
6.8 x 45-mm UCC 16” barrel advantage over 5.56-mm 20” barreled M16A4 rifle = 20%

Interesting Comparisons:

• The 16" barreled 7.62 x 39-mm AK-47 has more muzzle energy than the 5.56-mm in all barrel lengths, even the 20.0” inch barreled M16A4 rifle, and an even larger advantage over the more commonly fielded 14.5” barreled M4 carbine.

  • The 16.0” barreled 6.8 x 45-mm UCC has more muzzle energy than the 16.0” barreled 7.62 x 39-mm AK-47.
  • The 10.5” barreled 6.8 x 45-mm UCC (CQB Carbine) has more muzzle energy than the 5.56-mm in all barrel lengths, even the 20.0” inch M16A4 rifle.

When the U. S. Military adopted the M16 rifle firing the 5.56-mm NATO cartridge in 1965 they were fighting an enemy armed with the AK-47 rifle firing the 7.62 x 39-mm cartridge. Now some fifty years later with all of the advancements that have been made in the weapon systems for our military, our war fighters on the ground are still armed with the 5.56-mm NATO cartridge (slightly improved M855) being fired from the M4 carbine (less velocity than M16) and are still “OutGunned” as they were then.

With the decision of the military to “keep the M4A1 / M16A4 weapon system in service” for the foreseeable future due to budget constraints, the only way to get an improved cartridge to our war fighters and other users of this weapon system is to develop a cartridge that will deliver enough of a performance advantage to make the expense of the upgrade worthwhile and that will easily adapt to the existing weapon platform, that is “cost effective” and “Doable”.


The “6.8 x 45-mm Urban Combat Cartridge” is that cartridge.


“Practice and Train with 223 Remington / 5.56mm. Defend and Fight with 6.8 x 45mm UCC.”