1) Strap 
A broad, flat, raised area on the side of a buttstock. While considered a sign of a well-appointed gun, it actually may interfere with natural mounting and pointing---somewhat negating the positive effect of cast-off. The cheekpiece is carved on the left side of a stock for a right-handed shooter; it is on the right side for a left-handed shooter. ...
[n] - either of two straps of a bridle that connect the bit to the headpiece
noun either of two straps of a bridle that connect the bit to the headpiece
either of two vertical bars of a bit, one on each end of the mouthpiece. See illus. under · See