Why the Russian BMP IFV Cant Compete With the US/NATO M113 APC

The war in Ukraine continues to highlight the relative superiority in terms of accuracy and fire power of western armored systems and weapons. L 

Militarnyi reports:

The Russian military fired at an M113A3 armored personnel carrier using a BTR-82A 30mm automatic cannon from a point-blank range of 100 meters. Predictably, the BTR-82A missed most shots, with only two shells hitting the target. This demonstration is somewhat embarrassing considering that the M113 is an APC, whereas the BMP-3 is an IFV, marketed as a competitor to the Bradley! This highlighted a major flaw of the BTR-82A gun: its extremely low accuracy.

The Russian TV show “Voyennaya priyemka” (Russian propaganda TV show, ed.) aired another bold report on equipment captured in Ukraine.

This time, the Russian military fired at an M113A3 armored personnel carrier (converted back to an APC Sidam-25 anti-aircraft gun) using a BTR-82A 30mm automatic cannon. This was done from a point-blank range of 100 meters.

Predictably, the BTR-82A missed most shots, with only two shells hitting the target. These two shells managed to cover the short distance and penetrate the side of the M113, which is to be expected given the close range.

 

This demonstration is somewhat embarrassing considering that the Russian BMP-3, touted as having no analogues, has similar aluminum sides with a thickness of 43 mm. It’s important to note that the M113 is an APC, whereas the BMP-3 is an IFV, marketed as a competitor to the Bradley!

 

The purpose of this demonstration remains unclear. It was evidently more of a spectacle than a genuine test.

 

The propagandists also inadvertently highlighted a major flaw of the BTR-82A gun: its extremely low accuracy.

BTR-82A miss moment when firing from a minimum distance

M113 armor protection

In fact, the armor protection parameters of the M113 were studied long ago by the Soviet Union during the Vietnam War. This analysis was conducted by the 38th Research Institute, and the findings were also published on the btvt.info website.

 

The protection characteristics of the M113 armored personnel carrier, whose hull is welded from rolled sheets of aluminum alloy, are detailed in the table below.

Stability of hull parts M113 from B-32 rounds of different calibers

Designation	Thickness, mm	Obliquity of armor plate, deg	14,5 мм		12,7 мм		7,62 мм
			Distance, m	Approach angle	Distance, m	Approach angle	Distance, m	Approach angle
Upper glacis plate	38	45	400	0	No penetration	0	No penetration	0
Lower glacis plate	38	30	800	0	160	0		0
Hull above fender	43	0	100	42	100	72	100	90
			400	50	250	90
			800	75
			850	90
Below fender plate	31	0	100	34	100	46	100	56
			400	48	400	54	350	90
			800	47	800	90
			1000	54

The body armor parts of the M113, which serve different purposes and have varying thicknesses, are constructed from aluminum alloy designated as 5083 in the United States. This alloy is known for its excellent weldability, with a tensile strength of approximately 30 kgf/mm², and it does not require additional heat treatment.

 

The primary alloying element in this aluminum alloy is Magnesium (Mg), with a content ranging from 4.5% to 5.0%. It also contains Manganese (Mn) in the range of 0.6% to 0.8%, Chromium (Cr) up to 0.1%, and Titanium (Ti) up to 0.1%. The chemical composition of the alloy, expressed as a percentage, includes aluminum as the base element.

All welds on the armored parts are made without additional reinforcement or further processing of the weld bead. The seam width does not exceed 12 mm. At junction points where armor plates meet, one plate typically has a sample to halt the second sheet.