FIREARM ACTUATION SYSTEM

1 . An actuation system comprising:

a bolt carrier assembly configured for use within a firearm, the bolt carrier assembly including a firing pin configured for striking a chambered round;

a hammer assembly configured for striking the firing pin of the bolt carrier assembly;

an auto sear assembly configured to actuate the hammer assembly during operation of the firearm; and

a linkage assembly configured to couple the bolt carrier assembly and the auto sear assembly and effectuate the auto sear assembly actuating the hammer assembly.

2 . The actuation system of claim 1 wherein the auto sear assembly is further configured to cyclically hold the hammer assembly in a cocked position and cyclically release the hammer from the cocked position during operation of the firearm.

3 . The actuation system of claim 2 wherein the hammer assembly is configured to releasably engage the auto sear and effectuate the cyclical holding of the hammer assembly in the cocked position and the cyclical releasing of the hammer from the cocked position during operation of the firearm.

4 . The actuation system of claim 1 wherein the bolt carrier assembly is configured to be cyclically longitudinally displaced during operation of the firearm.

5 . The actuation system of claim 4 wherein the linkage assembly is configured to be cyclically longitudinally displaced in response to the cyclical longitudinal displacement of the bolt carrier assembly.

6 . The actuation system of claim 1 wherein the linkage assembly is configured to be cyclically longitudinally displaced within an upper receiver assembly of the firearm.

7 . The actuation system of claim 6 wherein the upper receiver assembly is configured to releasably engage a lower receiver assembly.

8 . The actuation system of claim 7 wherein the lower receiver assembly is an AR platform lower receiver assembly.

9 . An actuation system comprising:

a bolt carrier assembly configured for use within a firearm, the bolt carrier assembly including a firing pin configured for striking a chambered round and configured to be cyclically longitudinally displaced during operation of the firearm;

a hammer assembly configured for striking the firing pin of the bolt carrier assembly;

an auto sear assembly configured to actuate the hammer assembly during operation of the firearm and cyclically hold the hammer assembly in a cocked position and cyclically release the hammer from the cocked position during operation of the firearm; and

a linkage assembly configured to couple the bolt carrier assembly and the auto sear assembly and effectuate the auto sear assembly actuating the hammer assembly.

10 . The actuation system of claim 9 wherein the hammer assembly is configured to releasably engage the auto sear and effectuate the cyclical holding of the hammer assembly in the cocked position and the cyclical releasing of the hammer from the cocked position during operation of the firearm.

11 . The actuation system of claim 10 wherein the linkage assembly is configured to be cyclically longitudinally displaced in response to the cyclical longitudinal displacement of the bolt carrier assembly.

12 . The actuation system of claim 9 wherein the linkage assembly is configured to be cyclically longitudinally displaced within an upper receiver assembly of the firearm.

13 . The actuation system of claim 12 wherein the upper receiver assembly is configured to releasably engage a lower receiver assembly.

14 . The actuation system of claim 13 wherein the lower receiver assembly is an AR platform lower receiver assembly.

15 . An actuation system comprising:

a bolt carrier assembly configured for use within a firearm, the bolt carrier assembly including a firing pin configured for striking a chambered round; and

a linkage assembly configured to couple the bolt carrier assembly to an auto sear assembly.

16 . The actuation system of claim 15 wherein the bolt carrier assembly is configured to be cyclically longitudinally displaced during operation of the firearm.

17 . The actuation system of claim 16 wherein the linkage assembly is configured to be cyclically longitudinally displaced in response to the cyclical longitudinal displacement of the bolt carrier assembly.

18 . The actuation system of claim 15 wherein the linkage assembly is configured to be cyclically longitudinally displaced within an upper receiver assembly of the firearm.

19 . The actuation system of claim 18 wherein the upper receiver assembly is configured to releasably engage a lower receiver assembly.

20 . The actuation system of claim 19 wherein the lower receiver assembly is an AR platform lower receiver assembly.

21 . The actuation system of claim 19 wherein the lower receiver assembly includes:

a hammer assembly configured for striking the firing pin of the bolt carrier assembly; and

the auto sear assembly, wherein the auto sear assembly is configured to actuate the hammer assembly during operation of the firearm;

wherein the linkage assembly is configured to effectuate the auto sear assembly actuating the hammer assembly.

22 . The actuation system of claim 21 wherein the auto sear assembly is further configured to cyclically hold the hammer assembly in a cocked position and cyclically release the hammer from the cocked position during operation of the firearm.

23 . The actuation system of claim 22 wherein the hammer assembly is configured to releasably engage the auto sear and effectuate the cyclical holding of the hammer assembly in the cocked position and the cyclical releasing of the hammer from the cocked position during operation of the firearm.