Cartridges and modifications for M16/AR15 rifle
View Patent ↗Embodiments of the present invention relate generally to cartridges and modifications for an M16/AR15 rifle. In one embodiment, a modified M16/AR15 rifle or carbine includes a bolt having a maximum outside diameter greater than that of a standard M16/AR15 bolt; and a bolt extractor pivoted to the bolt. The bolt and the bolt extractor are operable to: transport a cartridge from a magazine to a barrel, and eject a spent cartridge from the barrel. The rifle or carbine further includes a barrel extension configured to receive the bolt; a standard M16/AR15 upper receiver coupled to the barrel extension; a standard M16/AR15 lower receiver coupled to the upper receiver.
1. A modified M16 rifle or M4 carbine, comprising:
a bolt having a maximum outside diameter (K in FIG. 3C ) greater than that of a standard M16/M4 bolt (existing M16A1-A4 versions and M4 and M4A1 versions);
an ejector carried by the bolt;
a bolt extractor pivoted to the bolt and having a maximum width (F in FIG. 4D ) greater than that of a standard M16/M4 bolt extractor (existing M16A1-A4 versions and M4 and M4A1 versions),
wherein:
the bolt, the ejector, and the bolt extractor operable to:
transport a cartridge from a magazine to a barrel, and
eject a spent cartridge from the barrel,
a length of the cartridge is equal to or slightly less than 2.26 inches, and the cartridge comprises:
a case having a case head diameter greater than 0.378 inch; and
a bullet having a diameter greater than or equal to 0.224 inch;
a barrel extension configured to receive the bolt;
a standard M16/M4 upper receiver (existing M16A1-A4 versions and M4 and M4A1 versions) coupled to the barrel extension; and
a standard M16/M4 lower receiver (existing M16A1-A4 versions and M4 and M4A1 versions) coupled to the upper receiver.
2. The rifle or carbine of claim 1 , wherein the case head diameter is greater than or equal to 0.4 inch.
3. The rifle or carbine of claim 2 , wherein the bullet diameter is greater than or equal to 6 mm.
4. The rifle or carbine of claim 2 , wherein the bullet diameter is greater than or equal to 6.5 mm.
5. The rifle or carbine of claim 2 , wherein the bullet diameter is greater than or equal to 6.8 mm.
6. The rifle or carbine of claim 1 , wherein the case head diameter is greater than or equal to 0.425 inch.
7. The rifle or carbine of claim 1 , wherein the case head diameter is greater than or equal to 0.45 inch.
8. The rifle or carbine of claim 1 , further comprising the magazine configured to hold a plurality of the cartridges.
9. The rifle or carbine of claim 1 , further comprising the barrel configured to receive the cartridge and connected to the barrel extension.
10. The rifle or carbine of claim 1 , wherein the bolt has an inside diameter (I in FIG. 3C ) greater than that of the standard M16/M4 bolt.
11. The rifle or carbine of claim 10 , wherein the barrel extension has a maximum inside diameter (I in FIG. 5C ) greater than that of a standard M16/M4 barrel extension (existing M16A1-A4 versions and M4 and M4A1 versions).
12. The rifle or carbine of claim 11 , wherein:
the bolt has an outer diameter (H in FIG. 3C ) greater than that of the standard M16/M4 bolt, and
the barrel extension has an inner diameter (J in FIG. 5C ) greater than that of the standard M16/M4 barrel extension.
13. A modified M16 rifle or M4 carbine, comprising:
a bolt having a maximum outside diameter (K in FIG. 3C ) and an inside diameter (I in FIG. 3C ) greater than those of a standard M16/M4 bolt (existing M16A1-A4 versions and M4 and M4A1 versions);
an ejector carried by the bolt;
a bolt extractor pivoted to the bolt,
wherein:
the bolt, the ejector, and the bolt extractor operable to:
transport a cartridge from a magazine to a barrel, and
eject a spent cartridge from the barrel,
a length of the cartridge is equal to or slightly less than 2.26 inches, and the cartridge comprises:
a case having a case head diameter greater than 0.378 inch; and
a bullet having a diameter greater than or equal to 0.224 inch;
a barrel extension having a maximum inside diameter (I in FIG. 5C ) greater than that of a standard M16/M4 barrel extension (existing M16A1-A4 versions and M4 and M4A1 versions) for receiving the bolt;
a standard M16/M4 upper receiver (existing M16A1-A4 versions and M4 and M4A1 versions) coupled to the barrel extension; and
a standard M16/M4 lower receiver (existing M16A1-A4 versions and M4 and M4A1 versions) coupled to the upper receiver.
14. The rifle or carbine of claim 13 , wherein:
the bolt has an outer diameter (H in FIG. 3C ) greater than that of the standard M16/M4 bolt, and
the barrel extension has an inner diameter (J in FIG. 5C ) greater than that of the standard M16/M4 barrel extension.
15. The rifle or carbine of claim 13 , wherein:
the case head diameter is greater than or equal to 0.4 inch, and
the bullet diameter is greater than or equal to 6 mm.