The MB 43LP does not rotate on to the tongue, but instead sits solidly
across the bars and lips of the horse’s mouth. The port is narrower than
a Level 3 mouthpiece, but still offers room for the horse’s tongue to
pass under the bit. Because the port is narrow, when the reins are
engaged, the horse will feel a slight pressure on the outside edges of
the tongue — a gentle reminder rather than a strong reprimand.
The port on this mouthpiece is only 1 ¼" high, so it will apply little
to no palate pressure. It is the mildest of the Level 2-3 mouthpieces in
terms of tongue pressure, just one step below a Level 3 mouthpiece.
Sweet iron mouthpiece oxidizes and encourages salivation.
Note: For a shorter shank and lower port, see the MMB Medium Shank with MB 06.
The MMB shank is an indirect (curb) rein action designed to be used
with the curb chain which is attached to the purchase. The MMB shank
uses the combination of the fixed cheek and fixed rein to apply pressure
to the mouth, chin and poll. The MMB’s innovation is the sliding action
of the mouthpiece. When the reins are engaged, the mouthpiece moves,
giving the horse the opportunity to respond to the lightest signal
before the mouthpiece hits the stop. The distance the mouthpiece can
travel between the stops means that this cheekpiece will not apply very
much downward pressure. The design of the mouthpiece attachment does not
allow the mouthpiece to slide as readily along the shank giving it a
more solid feel than the HBG. The patented Neil Merrill purchase plate
disperses pressure evenly against the horse’s face.