b-square scope mounts, tools and accessories
Frequently Asked Questions  
How To Determine the Correct
B-SQUARE Mounting System
Shotguns

The correct B-SQUARE saddle mount for most shotguns can be determined by examining the serial code on the firearm.

Remington 20 Gauge
Remington Model 870 & 870 Express

  • If there is a U or a K in the code then the gun is built on a 20 gauge frame and requires our part #16820
  • If there is an X or an N in the code then the gun is guilt on a 12 gauge frame and requires our part #16812

Remington Model 1100 & 1187

  • If there is a U or a K in the code then the gun is built on a 20 gauge frame and requires out part #16825
  • If there is an X or an N in the code then the gun is built on a 12 gauge frame and requires out part #16800

Browning BPS 12ga 3½" Magnum

  • If there is an NP or an NN in the code then the gun is built on a 12 gauge frame and requires our part #16250.
  • If any of the following appear, NR, NT, NS, NV, NX, or NW, then the gun is built on a 10 gauge frame and requires our part #16255.
Revolvers

Taurus 66, 669

Around 1993 Taurus changed the hole pattern of their models 66 & 669. B-SQUARE is able to mount either style but the mounts are not interchangeable.

A simple and effective way to determine whether your Taurus is pre-92 or post-93 is to examine the top strap of the revolver. If there is a forward factory drilled hole, then you have a pre-93 model. If there is no hole on the top strap, then you have a post 93 model.


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