Con

[Con @ConIbims]

@ronkainen7k15 Okay so I did a bit of digging and it turns out that this is most likely the TAM they trialed for Ecuador in '88.
It also had the thermal-sleeve but a slightly different one plus the standard TAM's "flat ring" on the mantlet, unlike the TH 301 which has a "smoother" transition:

[Con @ConIbims]

@ronkainen7k15 Very interesting!
The mount & mantlet appear to differ from the TH 301, lacking the Rh 105-30's standard "tube" (around the gun). Kinda wondering from when/where the first picture is..
(TH 301 and "standard" TAM for comparison)

[Con @ConIbims]

@kyle_harmse @ChungTzuW Looking at it again, the GDF-005 brochure seems to show a different helicopter, thus different firing test.

The detonation points match the 40mm PFHE Mk2 tests much better, some rounds fuze quite far away from the target, idk what 35mm proxy radius is but 40/70 is 7m.

[Con @ConIbims]

@kyle_harmse @ChungTzuW This looks alot like what Oerlikon later advertised in one of their brochures for the GDF-005 platform.
The explosive mass (filler) of MSD-054 was the same as MSD-042, i.e. 112g of Hexal P30.

So it may not be entirely impossible to show XM246 firing proximity fuzed HEI.

[Con @ConIbims]

@kyle_harmse @ChungTzuW The GDF-005 brochure is from 1988, however a Mauser-Oerlikon presentation (where the test-pictures are from) lists the proximity fuzed ammunition for 1979-1981.

It also kinda lists why the 40mm L/70 was chosen over the 35mm; It simply had more projected growth potential.

[Con @ConIbims]

@kyle_harmse @ChungTzuW Two other pictures of the proximity-fuzed HEI tests plus a side-by-side comparison of the proximity-fuzed HEI with MSD-042 HEI

[Con @ConIbims]

@ronkainen7k15 Great picture!
The thermal sleeve on the barrel looks odd tbh.
The bore evacuator is very similar to that of TH 301 and early TAMs (those that were still built in germany) but it doesnt match a Rh 105-30 nor L7A2 sleeve visually..
The mantlet being hidden makes it hard to tell.

[Con @ConIbims]

@ronkainen7k15 Small correction but the sights' designation is "PERI RT/A"
"T" = "Tag" (Day), which refers to the sights sole daylight channel.
"A" = Argentina

Other PERI R17 variants featured NVD or TVD's (such as R17A1 or R17A2)

great pictures either way!

[Con @ConIbims]

@ronkainen7k15 These are some awesome pictures of the Fire Control Equipment.
Very much appreciated!

[Con @ConIbims]

@ronkainen7k15 @bttr01438851 @KampfmitKette @WarDiaryOffi First Image from Jane's A&A 1991
2nd and third are the cover + related page from the ZEISS brochure and 4th image I honestly cant remember.
Most likely from Wehrtechnik around 1988-1991

[Con @ConIbims]

@ronkainen7k15 @bttr01438851 @KampfmitKette @WarDiaryOffi The gun itself is the Rh 105-30

Sources;
ZEISS Wehrtechnik Brochure (1985)
(ZEISS archive-ID: CZO-BMS 2855)

Rheinmetall Wehrtechnik Brochure;
"105 mm Tank Guns Basic Armament and Product Improvement" (09/1982)

[Con @ConIbims]

@NoLeaksPls Nothing has been leaked regarding BMPT's "external belts".
This has been confirmed through a forum moderator.

Gaijin made up the existence of the "external belts" and public uralvagonzavod brochures were used to disprove their nonsense claims (to no affect atm).