I know nothing about this pack, except what I see in single pic provided. It appears to be "Brit-inspired" due to detachable side pouches forming a day pack. Impossible to say if Brit items will "mate" with this pack.
It's really unfortunate that no pix of shoulder straps/suspension system are provided.
It appears to be an internal frame pack, which may not play well with hard armor. IIRC, that's why USMC had to ditch the ILBE series of packs. You WILL want to "adjust" the removable stays to your body, and often some help is required; minor issue.
As pictured, pack appears very high/long, and such may interfere with taking a prone shooting position; From exam of single pic provided, it "appears" that top "lid" is not removable, so strongly suggest NOT emplacing anything in top lid other than flat maps and such, in order to reduce height/length of pack and be able to assume a proper prone shooting position. YouTube vid posted below seems to suggest this.
No external PALS webbing, apparently.
If this a used pack, or even if actually new, strongly recommend examining every single inch of all stitched seams, and all fabric edges. Remove the stays (needed for re-adjustment anyways) and turn the pack inside-out in order to make a decent examination and any sort of remediation measures. If fabric edges are not taped, and raw edges of fabric are exposed, then carefully sear/melt the edges of fabric to prevent the fabric edges from progressively unravelling and then "blowing-out". This is a common and "normal" procedure with lots of milsurp items, so not necessarily a "knock" on this particular item. Practice makes perfect, and multiple Bic lighters will be required in order to prevent the lighters from overheating.
Again, just going by a single picture, and I could certainly be wrong about some "guesses" made above.
For the relatively inexpensive price, it seems fairly attractive. If you have a need for this type of pack, and have the $ to spare, this pack might be a reasonable "speculation" on your part.