Firearm accessory mounting assembly, firearm containing the same, and method of attachment

A firearm comprising:

• a frame having a top surface, longitudinal sides, and lateral sides shorter than said longitudinal sides;
• a barrel and receiver assembly;
• a recess portion in said frame having a planar top surface situated lower than said frame top surface, and interrupted by an approximately centered circular cylinder or disc-shaped protrusion extending from said recess portion top planar surface;
• at least one aperture or recessed indentation located within said recess portion top planar surface;
• an overhang or lip extending inwards within said recess portion forming a top shelf for a groove or slot formed at an end of said recess portion, said groove or slot extending laterally across said frame;
• and
• an adaptor plate having a top surface, a bottom surface, longitudinal sides, lateral sides shorter than said longitudinal sides, said adaptor plate including:
• at least one locator stud aperture dimensioned for receiving a locator stud or mounting post;
• a center aperture for providing a pivot location for said adaptor plate, said center aperture located adjacent said at least one locator stud aperture, such that said center aperture is approximately centered about said adaptor plate, said center aperture in rotatable communication with said circular cylinder or disc-shaped protrusion extending from said recess portion top planar surface, such that said adaptor plate is rotatable about said recess portion of said frame;
• a forward facing flange forming one edge of said adaptor plate, or a breech facing flange forming an opposite edge of said adaptor plate, or both;
• and
• said forward facing and/or breech facing flanges respectively insertable within said groove or slot formed at a respective end of said recess portion upon rotation of said adaptor plate;
• and
• an annular recess concentric with said center aperture, and larger in diameter than said center aperture, said annular recess dimensioned to receive an O-ring.

A method of attaching a firearm accessory to a firearm, said method comprising:

• attaching said firearm accessory to a adaptor plate, said adaptor plate having an aperture configured for pivoting;
• placing said adaptor plate into a recess portion of a frame of said firearm, said recess portion having a complementary circular- or disc-shaped protrusion extending upwards from said recess portion for receiving said adaptor plate aperture;
• pivoting said adaptor plate about said recess portion, thereby rotating a forward facing and breech facing flange of said adaptor plate into receiving grooves or slots formed at each end of said recess portion, said receiving grooves or slots having an overhang or lip extending inwards with respect to said recess portion;
• and
• locking said adaptor plate from further rotation by compressing a locking plunger pin upon rotation utilizing a recessed ramp exposed on an adaptor plate bottom surface, and having said locking plunger pin release into a receiving locking plunger pin aperture of said adaptor plate when said rotation is complete.

A rotatable accessory mounting assembly for rotatably mounting a firearm accessory to a firearm body, said mounting assembly comprising:

• an adaptor plate having a top surface, a bottom surface, longitudinal sides, lateral sides shorter than said longitudinal sides, said adaptor plate including:
• at least one locator stud aperture dimensioned for receiving a locator stud or mounting post;
• a center aperture for providing a pivot location about which said adaptor plate is configured to rotate, said center aperture located adjacent said at least one locator stud aperture, and approximately centered about said adaptor plate;
• a forward facing flange forming one edge of said adaptor plate;
• a breech facing flange forming an opposite edge of said adaptor plate;
• a forward facing sidewall, said forward facing sidewall located adjacent said forward facing flange and extending upwards from said top surface, and/or a breech facing sidewall, said breech-facing sidewall located adjacent said breech facing flange and extending upwards from said top surface;
• and
• wherein said forward facing sidewall or said breech facing sidewall includes:
• a release lever pocket traversing laterally across said forward facing sidewall or said breech facing sidewall;
• and
• a release lever rotatably insertable within said release lever pocket.

A rotatable accessory mounting assembly for rotatably mounting a firearm accessory to a firearm body, said mounting assembly comprising:

• an adaptor plate having a top surface, a bottom surface, longitudinal sides, lateral sides shorter than said longitudinal sides, said adaptor plate including:
• at least one locator stud aperture dimensioned for receiving a locator stud or mounting post;
• a center aperture for providing a pivot location for said adaptor plate about which the adaptor plate is configured to rotate to be attached to the firearm, said center aperture located adjacent said at least one locator stud aperture, and approximately centered about said adaptor plate;
• a forward facing flange forming one edge of said adaptor plate;
• a breech facing flange forming an opposite edge of said adaptor plate;
• a through-hole aperture adjacent said forward facing flange or said breech facing flange, such that said through-hole aperture traverses through at least a portion of a forward facing sidewall or a breech facing sidewall;
• and
• a recessed ramp exposed on said adaptor plate bottom surface, having sidewalls and a top wall, said recessed ramp extending in continuously decreasing depth from said longitudinal side, projecting laterally inwards towards said through-hole aperture.