I am wanting to put a Magpul bipod on an AR for range use.

I have a Harris on a bolt gun but wanted to give the Magpul a try on this rifle.

Which model would hold the tightest to the M-LOK handguard, the MOE model with the M-Lok adapter or the actual M-LOK version? I do not need the pan or cant feature.

From the website photos it looks like the MOE version with M-LOK adapter would be the closest fitting when folded.

If you have any photos of one mounted that would be great.

Thanks

The MOE version with the Mlok adapter looks like it has the closest fit to the handguard. On that page, if you scroll down there's a pic of one attached to a Mlok handguard.

I personally prefer a QD option for accessories like bipods, lights and optics so I can swap them from one weapon to another very easily.

Get a mlok pic rail and use a qd attachment.