Retaining devices for firearm bolts and firearms including same

A retaining device securable along an associated firearm and selectively operable to engage and retain an associated bolt assembly of the associated firearm in a substantially-fixed position for an indeterminate period of time with the associated bolt assembly including an associated bolt carrier with an associated carrier passage, said retaining device comprising:

• a mounting plate dimensioned for securement on an associated receiver of the associated firearm with the associated receiver including an associated receiver wall at an associated distance from the associated bolt assembly, said mounting plate having a thickness, a length and a width, said mounting plate including a first side surface portion and a second side surface portion facing opposite said first side surface portion with said first and second side surface portions spaced apart from one another in a thickness direction and said second side surface portion dimensioned to abuttingly engage the associated receiver, and said mounting plate including a pin-receiving passage extending therethrough in said thickness direction;
• and,
• a retention pin having a longitudinal axis and extending axially from a first end toward a second end, said retention pin extending through said pin-receiving passage such that said first end projects outwardly from said mounting plate beyond said first side surface portion, said retention pin supported on said mounting plate for axial displacement relative thereto between:
• a first pin position in which said second end of said retention pin extends outwardly beyond said first side surface portion of said mounting plate a first distance in said thickness direction such that in said first pin position said second end of said retention pin is engageable with the associated carrier passage of the associated bolt carrier of the associated bolt assembly to retain the associated bolt assembly in a substantially-fixed position relative to the associated receiver;
• and,
• a second pin position in which said second end of said retention pin is disposed a second distance from said first side surface portion that is less than said first distance such that in said second pin position said second end of said retention pin is disengageable from the associated carrier passage of the associated bolt carrier of the associated bolt assembly.

A retaining device securable along an associated firearm and selectively operable to engage and retain an associated bolt assembly of the associated firearm in a substantially-fixed position for an indeterminate period of time with the associated bolt assembly including an associated bolt carrier with an associated carrier passage, said retaining device comprising:

• a mounting plate having a height, a width and a length, said mounting plate securable on an associated receiver wall of an associated receiver of the associated firearm in an orientation in which said length is alignable with a longitudinal direction of reciprocal motion of the associated bolt assembly, said width is alignable with a vertical direction of the bolt assembly, and said height is alignable with a lateral direction of the associated bolt assembly with the lateral direction oriented transverse to the longitudinal and vertical directions, said mounting plate including a mounting plate wall with a base wall portion and a projection wall portion, said base wall portion including a first side surface portion and a second side surface portion spaced apart from said first side surface portion in a heightwise direction, said projection wall portion extending from said base wall portion in said heightwise direction toward an end surface portion, said mounting plate including first and second pin-receiving passages extending in said heightwise direction through said base wall portion and said projection wall portion of said mounting plate wall with said second pin-receiving passage spaced from said first pin-receiving passage in a widthwise direction, and a securement passage extending in said heightwise direction through said base wall portion with said securement passage spaced from said first and second pin-receiving passages in a lengthwise direction;
• a retention pin having a longitudinal axis and extending axially from a first end toward a second end, said retention pin extending through one of said first and second pin-receiving passages such that said first end projects outwardly from said mounting plate beyond said end surface portion, said retention pin slidably supported on said mounting plate for axial displacement in said heightwise direction relative thereto;
• a securement device extending through said securement passage and dimensioned for engagement with the associated receiver;
• an operator-actuation device secured on said first end of said retention pin;
• and,
• a spring compressively disposed between said mounting plate and said operator-actuation device;
• said operator-actuation device and said spring cooperative to provide for axial displacement of said retention pin between:
• a first pin position in which said second end of said retention pin extends outwardly beyond said first side surface portion of said mounting plate a first distance such that in said first pin position said second end of said retention pin is engageable with the associated carrier passage of the associated bolt carrier of the associated bolt assembly to retain the associated bolt assembly in a substantially-fixed position relative to the associated receiver;
• and,
• a second pin position in which said second end of said retention pin is disposed a second distance from said first side surface portion that is less than said first distance such that in said second pin position said second end of said retention pin is disengageable from the associated carrier passage of the associated bolt carrier of the associated bolt assembly.