OK, I took another look in our B Class stores cage at 3 PPCLI. Here are the two types of C9 "soft pack" ammo carrier that we have:
1. Older (Dec 2001-dated) U.S. Woodland Camouflage 100-rd Soft Pack:
- NSN 1005-01-334-1507
- Part Number 12944203
- MAGAZINE, CARTRIDGE, SOFT PACK 100 RD, REUSABLE
2. Newer (2004-dated) Australian Olive Green 200-rd Soft Pack:
- NSN 1005-66-143-5979
- MAGAZINE (CLOTH) COLLAPSIBLE 200 RDS FOR MINIMI F89 OLIVE
Of the two different versions, the Aussie OG 200-rd soft-pack appears to be the better choice. It holds a full belt of 200 rds, has a sturdy spring-steel lock/release latch, and is constructed from very robust materials with nylon-taped edges, rivets, etc.
As "GO!!!" correctly pointed out however, the soft-packs can be a PITA to load and use under field conditions. This is particularly so when a partial belt has room to bounce around inside the pack and become twisted/tangled.
On the plus side, the soft packs are much quieter to carry than the standard plastic cans. They are useful for dismounted patrolling or other occasions where noise is a concern.