this carbine tender thing literally stemmed out from ARDE / OFB's failures of delivering an adoptable Carbine variant of INSAS around 90s when the rifle and G variants got inducted but carbine one got rejected over high noise and controllability issues

- after that they forked Amogh and eventually MSMC/JVPC out of that line while also trying to woo the armed forces with some Kalantak "micro assault rifle" thing
so as i was saying,
THE ORIGINAL INSAS Carbine was a short barrel version of INSAS, looked something like this

yeah i know it's matchbox sized pic, but that's the only one i have from some late '80s era article on INSAS by Shekhar Gupta
it failed in trials over 'too much recoil, noise' reasons, but aside from this, there existed a...variant like this because...reasons
anyways, then DRDO ARDE folks made Amogh in 5.56x30mm MINSAS, original Amogh had wooden construction with AKS-47 style underfolding buttstock

some other small matchbox styled images suggest Amogh too had some other prototypes like,
-one with AK style build as shown above, a reciprocating charging handle on right side and AK side fire selector on right side, some had vertical front grip like above, some didn't,
-other was INSAS-esque build with a non-reciprocating SLR-esque charging handle on left side atop handguards and thumb operated fire selector on left side => THIS INSAS-esque build of Amogh became standard build of Amogh later on, with INSAS styled polymer translucent magazine, black coloured polymer furniture etc
but Amogh too didn't get adopted as Carbine, although plenty of police and paramilitary units are using it
then, DRDO ARDE folks tried to revive original INSAS Carbine line by making Kalantak '07 that later got name "Micro Assault Rifle", the earlier prototype was probably forked from OG failed INSAS carbine, while later prototype was probably forked from Excalibur rifle,

as you could clearly see there's...some thing sticking out of barrel of Kalantak here...what is it ? my best assumption is, it's some sort of 'expansion chamber' ported from barrel so excess gases can expand there and reduce muzzle blast and noise, the front end might be having release port for them to vent out after expanding in rearward bulged chamber

and also, in later Excalibur fork of Kalantak '07 with black things, you can also see a magwell extension ?! yes! that 'button' like thing seems like magazine release button,
and yes that Eotech Holographic sight is actually mounted atop a small piece of picatiny rail! perhaps Kalantak '07 was first ever desi weapon here with even a piece of picatiny rail!
nevertheless, even Kalantak '07 'Micro Assault Rifle' did not get adopted
then happened what?
most likely MSMC/JVPC
those too had two distinct variants,

original MSMC was like above, with giant open pistol grip for most likely using it with mittens in cold regions, this build was definitely forked from INSAS 1B, and it had single piece kalashnikov style receiver design, top cover was just held in place by locking recesses on trunnions and recoil spring tab at end, top cover was given full length of picatiny rail for reddot or holographic style optics, it also had a gas cut off lever in front, for some reasons?! and yes it did take bayonets too
later they further improved upon this fork of MSMC, the changes on it were minimal, probably they removed gas cut off lever, and provided more pistol-grip styled frame at bottom, rest it remained same,
then, they shifted to two-piece receiver design with final prototype of MSMC that eventually became JVPC

top - final variant of MSMC that became JVPC, bottom - current version of JVPC in that finish, notice changes in handguards and grip section, also i think very recent JVPCs also have newer design of muzzle device on barrel
So, JVPC is partially in service across various units but didn't become mainstream replacement of 9mm 'Sterling' Carbines
^a summary of how much we've gone through just to replace that janky ass 9mm Sterlings

