http://www.thefirearmblog.com/blog/2009 ... mag-20-lr/Magpul 7.62×51mm PMAG 20-LR
The long-awaited 7.62x51mm PMAG has finally been given a name and is now in production. At $19.95, Magpul are going to be selling truck loads of these mags.
The PMAG-LR holds 20 rounds of 7.62x51mm or .308 Winchester rounds and is compatible with the following rifles ...
Mk11 / M110
KAC SR25
DPMS LR308
LMT 7.62 MRP
LaRue Tactical OBR
LWRC REPR
POF P-308
It is not compatible with the AR-10, M14/M1A or SCAR-H.
ETA: AIM is selling them for $18.95:
http://www.aimsurplus.com/acatalog/Magp ... zines.html