View Full Version : Bassett Picatinny Low Mount

March 18, 2017, 14:42

Figuring to give a Bassett mount a try. is the low profile picarinny version with low profile rings the same height as the low profile that uses weaver rings?

I dont need to see irons with scope installed, and dont intend to mount anything with huge objective lens.


March 18, 2017, 16:47
I think its going to depend on whose "low profile" rings you use on the rail.

I have both and visually compared them. If you took the Weaver rings off the original split mount and put them on the picatinny rail a scope would be in the same relative position.

I personally like the split (original) mount better than the rail.

But the mount I really like best (but they are scarce as hens teeth) is the Israeli (IDF) split mount with the integral 26mm rings. This of course limits your choice of scopes. But what's great about it is the spring loaded plunger in the locking knob - the tip of which engages serrations on the mount - under the knob. Once the tip of the plunger engages the serrations it is not going to move unless you turn it to take it off the rifle.

March 23, 2017, 18:21
Received the picatinny low mount. Seems well made. Mounted a set of Leupold QD high rings that I had on hand, was very high. Will have to calc min ring height for a scope I intend to mount. Also figuring to install a cheek riser.

March 25, 2017, 16:19
Tough to determine min ring height to clear the rear sight, so ordered Seekins low set and hope it'll clear. Objective will not be an issue. Will be using either 34 or 40mm objective so plenty of room up front. I see some photos where rear sight is nested just behind the power adjuster. I will say the VX-R seems to have a generous range of eye relief (a 2-7x34).

April 01, 2017, 13:08
http://i61.photobucket.com/albums/h63/byronfoster/IMG_3415_zpsnu2ozyjj.jpg (http://s61.photobucket.com/user/byronfoster/media/IMG_3415_zpsnu2ozyjj.jpg.html)

Bassett arrived as did Seekins low height rings. This was a gamble whether the rear sight would clear the power ring and eyepiece. Turned out just right. Mocked up with 2-7 VX-R, but have a 3-9x50 on the way.

April 01, 2017, 13:20
Once I knew it would fit time to lap the rings. Did a search here about lapping which turned into an argument but figured I'd bite the bullet and get the tools.

First I satrted at the bottom and worked my way up. Basset includes a wrench with loop with which to torque the mount screw by simply lifting the rifle by the wrench's lanyard. Probably not an accident that the M14 multi-tool gas plug wrench is the same size. Even nicer, the cleaning rod attachment point is at nearly same lever length as the Bassett tool. One leas thing to carry.

http://i61.photobucket.com/albums/h63/byronfoster/IMG_3421_zpsobp8z7cw.jpg (http://s61.photobucket.com/user/byronfoster/media/IMG_3421_zpsobp8z7cw.jpg.html)

April 01, 2017, 13:27
To keep caps mated to rings I lightly struck each pair with one dot, and two dots. If youre gonna lap the rings make the most of it!

http://i61.photobucket.com/albums/h63/byronfoster/IMG_3417_zpsf7pr5tmi.jpg (http://s61.photobucket.com/user/byronfoster/media/IMG_3417_zpsf7pr5tmi.jpg.html)

Next I mounted the rings using the lapping bar in place of the scope. I wanted the rings to be coaxial as possible when tightening the base screws to minimize lapping later. I also made sure both rings were shifted forward so cross bars are loaded against forward edge of the slots.

April 01, 2017, 13:33
Used medium strength thread locker on the bottom screws, torqued to 25 in-lb, then lapped with caps installed and caps screws just finger tight. Any tighter locked up the lapping bar. Used 600-grit lapping compound. Here is finished product.

http://i61.photobucket.com/albums/h63/byronfoster/IMG_3418_zpsgbzdx4yl.jpg (http://s61.photobucket.com/user/byronfoster/media/IMG_3418_zpsgbzdx4yl.jpg.html)

April 01, 2017, 13:37
I've read of some rings interfering with the Bassett picatinny mount on one side. It's a close fit with these rings but no interference.

http://i61.photobucket.com/albums/h63/byronfoster/IMG_3416_zpsjjsvq098.jpg (http://s61.photobucket.com/user/byronfoster/media/IMG_3416_zpsjjsvq098.jpg.html)

April 01, 2017, 13:38
After lapping everything seems snug and well aligned.

http://i61.photobucket.com/albums/h63/byronfoster/IMG_3420_zpsckbnakby.jpg (http://s61.photobucket.com/user/byronfoster/media/IMG_3420_zpsckbnakby.jpg.html)

April 01, 2017, 13:47
To me ring lapping seems a lot like line-boring engine main bearings. Gotta install everything the same way to end up with the same alignment. I didnt want to believe it was necessary because I'd never done it and didnt own the tools. But for the small investment in tooling I'm now a believer. After just a few strokes I was surprised at the amount of misalignment, and I didnt use junk parts.

Also note that the Seekins rings are clamped the the pic rail by two torx screws per ring. I like the idea of two screws instead of one nut, or one QD lever. QD feature is of no value with the Bassett because I can tip off the entire assembly with the receiver screw.