Gun boot is too large for mount. After 1 ...
937842
Gun boot is too large for mount.  After 1 hunt it was stripping rubber off of ring that holds it in place.  After secong hunt zipper on bag completely broke.  Not a quality product at all.  I expect so much more from kolpin.  This thing makes me nervous transporting a $3k rifle on my atv.
751022
Product Description Image shows, and the description states, it will mount on a 3/8" dove tail.  It does NOT.  The sight mount is way too wide - more like a 3/4" (20mm) rail mount, NOT a 3/8" dove tail. Will have to return it as I need one to mount on a 3/8" rifle scope dove tail.  Also, the quality of the optics are in question as there is a slight ghost/offset image of the reticles in both colors and regardless of the type (point, cross, moa, etc.) which ends up giving the reticle a blurry image.
2540302
It's video is fine but the mount it comes with SUCKS for a gun. I have had it fall off my gun multiple times no matter how hard I tighten it. Lucky to have not lost it in the marsh yet while duck hunting
1678878
Well I have the newer 2015 Desert Eagle .50 which has the Integrated Muzzle Break with lower Picatinny Rail which prevents it from sliding in.  Otherwise if you have the previous Version this seems like a nice catch for a Holster that is form fitting and at a decent price.

UPDATED*** Well I submited for a Return, however I then was told that I could soak the holster for an hour, dry it off, oil the crap out of my desert eagle and slide the holster back on and it will reshape itself as the Leather drys.  Now it fits like a glove with the lower Picatinny Rail.  If it wasn't this great of a price I probably would not of tried that method, but it ended up working well.  It seemed like my only option as I called Magnum Research and they didn't even have a holster for the newly desined Desert Eagle yet!

Now I've got a holster to put it in, instead of lugging this heavy fire arm all over the place.  Edited it from a 3 to a 4.
4887786
These don't fit properly over my Weaver base on Savage MkII (the screw is too big to fit in the middle of the base).

Despite that they are very solid and the rifle holds the zero between sessions. It just looks weird.
4874186
Way too big, waaaay too big.  Probably designed to be worn over plates, I get it.  I'm 6' 195lbs and I had to cinch the shoulder straps down as far as they would go, and the rig still sits too low for my liking.  Same with the back strap, its cinched down nearly 75% and now I have a ton of extra webbing to content with securing.  On mine, the individual MOLLE segments are also not 100% uniform in width; some MOLLE straps easily slide through for mounting, others are too wide and I need needle nosed pliers to pull them through.  The armpit velcro pockets for M4 mags are useless for that purpose; an M4 mag on either side in this pouch with the straps cinched down is very, very uncomfortable.  Again, probably fine if you're using soft armor under this rig.  For my work-related rig, I looked elsewhere, for my hunting rig, this will suffice.
4511619
Great scope. Only problem is mounts don't fit my airgun rails. Mount construction and height are great, just doesnt fit.
3884157
I used them OK, but they are too big for my gun rack.  They should include dimensions in the description.
3022656
Gun is held in place by gravity. Retention screw is worthless, try to run and your gun will fall out.
1714058
It fit.  Should recommend lok-tight for screws, mount became loose after 50 rounds.
4888695
It worked for what I needed.  But I will say that they are large.  They do not fit tightly to your boot like they picture shows.
3839579
This is NOT dimensioned for the M16A1, or any using a standard bird cage or prong muzzle device.  The loop that goes over the barrel will not fit the diameter of the muzzle device resulting in not being able to mount on the rifle properly.  I got around this by boring the hole wider, but I doubt that most are going to have the access that I have to machine tools.
844149
Two things:

One, It's too tall for a standard rifle-sited style shotgun (like a Saiga-12). I really don't know if a taller holographic-style red dot scope would be the answer.

And two, for comparison, I switched it out on a AR-A4 (flat-top), with a 6 position stock. Unfortunately, I ended up with the same results. The Cheek Rest just sits too tall for a standard flat top receiver with iron sights. It's also too tall for a standard mounted hunting rifle scope. Maybe my head is too fat?

Bottom line: This will fit onto a 6 position Tapco-style stock with a little persuasion-- but it does fit. Nice and snug-- at least at first. Eventually, over time, it loosens a bit, making it easier to remove and reattach. Personally, I think it's too tall for standard rifle sights and standard AR rifle iron sights. I cannot see how it would be different with a AR-A2 "handle" type site either.
2559694
The mount was very hard to get onto my Springfield XD 9. I finally got it on but now I can't get it off, kind of disappointed. I will have to take it somewhere to get it removed. Anyone else have this trouble?
3135887
Did not fit my muzzleloader, Had to return, I did receive a prompt refund.
2859357
Only complaint is that the two mounting stud that attach to the bipod adapter need to be more robust /larger in diameter for stronger bearing surface.
4714707
The boot has two buckle straps as shown, one across the front of the boot and one across the back.  The one across the back was notably too long on one side, but not the other side, leaving a large and noticeable gap between the strap and the boot.  There was no mechanism for adjusting the strap, with only one hole for the buckle and not enough space to punch another hole.  I had to return the item.