I have four 4x32 ACOGs, (TA01NSN, TA31F, TA31DOC, and TA31ECOS), all of them have the excellent LaRue ACOG mount. Having heard so much great reviews on the Bobro mount, I had to get one from our friends at Loess Hills Tactical to try one out.
The Bobro mount is auto compensating, and so does not come (or need) any tools, since it’s not adjustable or needs to be adjusted.
Before I got this mount, I thought the locking mechanism stuck out quite a bit. After comparing it with the LaRue mount, the protrusion is very similar, with Bobro’s 0.10 or so thicker (not counting the protrusion of the cam on the LaRue lever.)
Bottom view
Other than the locking mechanism, the biggest difference has to do with where the mount sits on the receiver.
With the LaRue mount, it can be mounted almost right next to the BUIS, whereas the Bobro’s (whether with the locking lever on the left, or right), leaves a rail space between itself and the BUIS.
Notice the ACOG is fully seated and enclosed in the LaRue mount, whereas a tiny portion of the ACOG’s bottom overhangs the Bobro’s mount. I don’t think this has any ill effect, and it does serve to bring the ACOG further toward the rear. For a short eye relief optic such as the 4x32 ACOG, I like the scope to be as close to my eye as possible, though with the carbine retractable stock, this isn’t much an issue. On rifles with fixed stocks, every bit helps.
With the Bobro’s mounted one rail space forward, I wondered if the slightly rear cantilevered aspect would offset or negate the mount being one rail space forward…
Yes, not by much. LaRue’s mount still places the ocular lens closer to the eye than the Bobro’s.
The height of the mount is similar, the channel where the ACOG sits on is identical on both. LaRue’s mount that interfaces with the ACOG’d bottom is taller, whereas the Bobro’s is shallow. I’m not sure if this makes any difference, it seems LaRue’s offers more resistance to the ACOG canting if it’s knocked very hard, but I’m just guessing.
Regarding the locking mechanism, this is all personal opinion: Bobro’s is easier to unlock and remove, being it has a single lever, the thumb pushes down on the lever’s security lock while the index finger swings it open. LaRue’s has two levers, the rear lever has a security lock, one pulls the lever rearward then swings it open.
The auto compensating, no-adjustment-required aspect is appealing to me. I rarely have had to adjust my LaRue mounts (and I have several, on top of my ACOG mounts). I keep a wrench in my pack in case I need to, so far I’ve only lent it to others to adjust theirs, having never needed it for myself yet while in the desert or at the range.
When it comes to non-adjustable vs. adjustable comparison, it is not solely a comparison of solely LaRue against Bobro, but every other adjustable mount against Bobro. ADM’s can be adjusted without a tool, as many others like GG&G, Surefire, KAC, Wilcox, etc. What if there is no adjustment necessary as with a Bobro mount (not the old ARMS that can be hit or miss, while being non-adjustable)?
The Bobro ACOG mount is a serious contender for the best ACOG mount, in my opinion 