5.25 inch blade enough? I should think so. What are you going to be doing? Can you accomplish your task with a shorter (and lighter) blade?

I have both a Glock combat knife and folding shovel (got them years ago - in the 80's - for free from a Glock rep trying to interest a local PD in Glock 17's). They are servicable military knives OMHO. The knife is well built, nicely balanced, and has a rugged, hard-plastic case. It can take a lot of abuse (I carried one on my LBE when I was in the Reserves.) However, the darn thing will lose it's edge if you so much as look at it funny. I was always re-sharpening it. Today, when I go camping/canoeing, I take my old (and I mean old!) Buck Folding Hunter. You can sculpt marble with it and it will still hold an edge.

As for the Glock shovel, it is cute, has some nice gadgets (saw blade in the handle), but the shovel lock would often slip when digging through hard soil, and the shovel blade would rotate past 90 degrees! I still carry the heavier, and more reliable, Ames (US Army) tri-fold shovel instead.

Hope this helps,

.....CLIFF