Back to results
US 9,038,525 B2Granted
Firearm
AssigneeArmWest, LLC
InventorsLeroy James Sullivan, James McGarry, Robert L. Waterfield, Paul N. Latulippe, Jr.
Life of this patent
Estimating the term…
Abstract
A firearm can have a bolt having a plurality of locking lugs that are configured to have a shear area that is at least approximately 1.3 times that of a standard M16/M4. A piston can be formed on the bolt and can have a plurality of rings that are configured to cooperate with the piston to mitigate gas leakage past the piston. Each of the rings can have a key formed thereon and a gap formed therein such that the gap of one ring is configured to receive at least a portion of the key of another ring. The bolt carrier can have a double cut cam.
Claims33
A firearm comprising:
- a bolt having a plurality of locking lugs;
- a piston formed on the bolt and having a plurality of rings configured to cooperate with the piston to mitigate gas leakage past the piston, each of the rings having a key formed thereon and a gap formed completely therethrough such that the gap of one ring is configured to receive at least a portion of the key of another ring;
- a bolt carrier to which the bolt is movably attached, the bolt carrier having a double cut cam;
- a weight movably disposed within the bolt carrier, the weight being configured to provide a forward and a rearward impact to offset rearward and forward bouncing of the bolt carrier;
- first and second springs contained within the bolt carrier that centrally bias the weight within the bolt carrier;
- a carrier key attached to the bolt;
- a tube configured to provide gas from a barrel of the firearm to the piston via the carrier key, the tube having a heat radiator formed on at least a portion of the tube;
- a gas metering plug having a gas metering hole configured to meter gas from the barrel of a firearm to the bolt carrier of the firearm, wherein the gas metering hole is located away from a gas port of the firearm;
- and
- a front sight block having a rear band and a front band for attaching the sight block to the barrel and having a gas passage formed in the front band for facilitating gas flow from the barrel to a gas tube of the firearm.
7 more elements
A bolt group for a firearm comprising:
- a bolt having a plurality of locking lugs;
- a piston formed on the bolt and having a plurality of rings configured to cooperate with the piston to mitigate gas leakage past the piston, each of the rings having a key formed thereon and a gap formed completely therethrough such that the gap of one ring is configured to receive at least a portion of the key of another ring;
- a bolt carrier to which the bolt is movably attached, the bolt carrier having a double cut cam;
- a weight movably disposed within the bolt carrier, the weight being configured to provide a forward and a rearward impact to offset rearward and forward bouncing of the bolt carrier;
- first and second springs contained within the bolt carrier that centrally bias the weight within the bolt carrier;
- and
- a carrier key attached to the bolt carrier.
4 more elements
A method comprising:
- mitigating gas leakage past a piston of a firearm using a plurality of rings, each one of the rings having a key formed thereon and a gap formed therein;
- wherein the gap of one of the rings is formed completely therethrough and receives at least a portion of the key of another of the rings;
- and
- inhibiting rearward and forward bouncing of a bolt carrier with a weight that is movably disposed within the bolt carrier and first and second springs contained within the bolt carrier that centrally bias the weight within the bolt carrier, wherein the weight is configured to provide a forward and a rearward impact to offset the rearward and forward bouncing of the bolt carrier.
1 more element
A firearm comprising:
- a barrel;
- a gas port formed in the barrel;
- a gas tube;
- a bolt carrier;
- a weight movably disposed within the bolt carrier, the weight being configured to provide a forward and a rearward impact to offset rearward and forward bouncing of the bolt carrier;
- first and second springs contained within the bolt carrier that centrally bias the weight within the bolt carrier;
- a front sight block having a rear band and a front band for attaching the sight block to the barrel and having a gas passage for facilitating gas flow from the barrel to the gas tube;
- and
- a gas metering plug having a gas metering hole configured to meter gas from the barrel to the bolt carrier, wherein the gas metering hole is located away from the gas port.
6 more elements
A firearm comprising:
- a bolt carrier;
- a weight movably disposed within the bolt carrier, the weight being configured to provide a forward and a rearward impact to offset rearward and forward bouncing of the bolt carrier;
- and
- first and second springs contained within the bolt carrier that centrally bias the weight within the bolt carrier.
1 more element
A method of assembling a firearm comprising:
- providing a bolt carrier;
- movably disposing a weight within the bolt carrier;
- providing first and second springs contained within the bolt carrier that centrally bias the weight within the bolt carrier;
- and
- wherein the weight is configured to provide a forward and a rearward impact to offset rearward and forward bouncing of the bolt carrier.
2 more elements
A firearm comprising:
- a bolt carrier;
- a weight movably disposed within the bolt carrier, the weight being configured to provide a forward and a rearward impact to offset rearward and forward bouncing of the bolt carrier;
- and
- first and second springs contained within the weight that centrally bias the motion of the weight within the bolt carrier.
1 more element
Dependencies are inferred from the claim text.