Grenade launcher on the M41A Mk2.5 doesn't function properly

[BladeburstNINJA]

Testmerges

#3676: 'New Varadero revamp' by AnuvKH at commit 22e1d92 #3783: 'Project ARES - Apollo Controller' by realforest2001 at commit 0c6722c #3729: 'Ravager and Hedgehog changes' by GoldenDarkness55 at commit 16b30ac #3850: 'Donator Kits' by realforest2001 at commit 3190146 #3879: 'Yautja Rework Holder' by realforest2001 at commit 442019a #3749: 'Re-balances acid damage' by Diegoflores31 at commit 19f32df #3897: 'Explosive pouch size doubled' by morrowwolf at commit 589d4aa #3909: 'Ports TGMC autofire' by Zonespace27 at commit 071bc99

Description of the bug

When switching to the grenade launcher on the Mk2.5, the toggle button icon won't light up green, breech sprite won't function, and grenades won't fire/get eaten.

What's the difference with what should have happened?

Grenade launcher should work as intended.

How do we reproduce this bug?

1.Get Mk2.5
2.Attempt to use grenade launcher with grenades.
3.
...

Issue Bingo

• Issue could be reproduced at least once
• Issue happened in a recent (less than 7 days ago) round
• Couldn't find an existing issue about this (https://github.com/cmss13-devs/cmss13/issues)

[Zonespace27]

Mk2.5 was an admin-made gun for a test/event. Cannot repro with mk2