For stock Umarex HDR50/TR50 drums, choose the TAC-MAG T4 “Little Baby.” It fits standard drums as well as Tac-Mag tuning drums. The T4T “Little Baby” V2 is the dedicated tuning-drum version; it is not the default choice for someone keeping the original drums.
Both products are magazine holders, not replacement drum magazines. The choice is about finding a holder for the drums you already own.
What the shared names do—and do not—tell you
“Little Baby” and “HDR50/TR50” appear in both product descriptions. They identify the holder family and the relevant marker, but they do not distinguish the intended drum type. Read the complete TAC-MAG T4 or TAC-MAG T4T V2 name alongside the drum-compatibility description.
HDR50 and TR50 are regional names for the same Umarex marker. Keep that naming pair separate from generation information: the V2 in TAC-MAG T4T V2 belongs to the holder’s product name. It should not be read as a statement that the holder is specifically for a TR50 Gen2.
Drum fit is separate from mounting fit
A holder has two different relationships to check: which drums it accepts, and how the holder attaches to the marker.
The T4 uses the lower Picatinny rail on the HDR50/TR50. With T4T V2, the Pica mounting variant is a separate part of the product choice. Before ordering T4T, confirm the mounting configuration supplied with your order; do not assume that choosing the holder name also chooses a particular Pica variant.
If your aim is to keep using standard drums, the TAC-MAG T4 Little Baby is the relevant product to view.
Compare the two Little Baby holders
TAC-MAG T4 "LITTLE BABY | Magazine Holder | Magazine Holder | HDR50 TR50 | Cooperation X FischerSTUFF
The T4 fits standard Umarex HDR50/TR50 drums and Tac-Mag tuning drums. Choose this holder for stock drums.
View TAC-MAG T4
TAC-MAG T4T "LITTLE BABY" V2 | Magazine holder | Magazine Holder | HDR50 | Cooperation X FischerSTUFF
The T4T V2 is the dedicated tuning-drum holder for Umarex HDR50/TR50. Confirm the Pica mounting configuration before ordering.
Compare TAC-MAG T4T V2A short look around Z-RAM
If you would like to explore more of Z-RAM, this short shop tour introduces the own-brand categories. It is an optional look around the range, separate from the T4 and T4T comparison.
▶ Play on YouTubeThe Ultimate Shop for RAM Tuning Parts: Ammo, Valves, Chambers, and More HDR50 TR68 FSC TCP
Channel: Z-RAM
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