I believe it is. I’m new to these magazines.
I can take a picture of it but looking on the Magpul site it appears to be. It was in an MDT LSS chassis I purchased.
Magpul 7.62 x 51 - 10rnd magazine which is as new totally unmarked condition. Selling as now got a 5 shot with 6BR conversion, which I prefer.
£25 posted.