Caliber modification using modular fire control group
The present invention relates to an assembly for modifying a rifle to accommodate various calibers of ammunition and method for changing calibers in a rifle using same.
1. A caliber modification system comprising:
an independent fire control group comprising a trigger;
a fore end comprising a fore end fire control group interface;
a rear module that interfaces with the independent fire control group and further comprises a buffer tube interface;
wherein the fire control group, fore end, and rear module are removably affixed and separable from one another and combine to form a three-part lower receiver configured to interface with an upper receiver;
wherein the three-part lower receiver is compatible with an existing rifle platform to change the rifle platform caliber to a different caliber via replacing a lower receiver with the three-part lower receiver.
2. The caliber modification system of claim 1 wherein a barrel is added as part of the caliber modification system.
3. The caliber modification system of claim 1 , wherein the fore end accommodates ammunition of a particular caliber.
4. The caliber modification system of claim 2 , wherein a replacement fore end with a caliber different from that of the fore end may be interchanged with the fore end to accommodate a different caliber.
5. A method for changing the caliber of a weapon comprising:
removing a lower receiver from the weapon;
attaching a multi-part lower receiver to the weapon;
wherein the multi-part lower receiver comprises an independent fire control group comprising a trigger, a fore end comprising a fore end fire control group interface, and a rear module that interfaces with the independent fire control group and further comprises a buffer tube interface;
wherein the fire control group, fore end, and rear module are removably affixed and separable from one another to form a three-part lower receiver; and
attaching a barrel with a caliber matching that of the fore end fire control group.
6. The method of claim 5 , wherein the fore end accommodates ammunition of a particular caliber.
7. The method of claim 5 , wherein a replacement fore end with a caliber different from that of the fore end may be interchanged with the fore end to accommodate a different caliber.