US2025314439A1PendingUtilityA1

Compact Bolt Carrier Group

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Assignee: ROTH PARKERPriority: Apr 3, 2024Filed: Apr 3, 2024Published: Oct 9, 2025
Est. expiryApr 3, 2044(~17.7 yrs left)· nominal 20-yr term from priority
Inventors:Parker Roth
F41A 3/30F41A 3/26
40
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Claims

Abstract

Presented here is a compact bolt carrier group designed for a firearm. This compact bolt carrier group incorporates a compact cam pin and cam guide rail, facilitating the positioning of operating systems closer to the bolt. This configuration enables a more compact firearm design.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A compact bolt carrier group for a firearm comprising:
 A bolt carrier, a rotating bolt, a cam pin, and a cam guide rail;   Said bolt carrier has at least one guide rail slot that accepts at least one cam guide rail,   Said cam pin protrudes in the upward direction from the bolt carrier,   Said cam pin having a cam bearing surface,   Wherein, the said cam bearing surface and at least one cam guide rail are at least partially within 0.49 inches measured vertically from the center of the firing pin aperture, and;   wherein said rotating bolt is compatible with an M4 barrel extension.   
     
     
         2 . The compact bolt carrier group of  claim 1 , wherein there is a cam guide rail on each side of the bolt carrier. 
     
     
         3 . The compact bolt carrier group of  claim 1 , wherein a cam guide rail is an insert into the receiver. 
     
     
         4 . The compact bolt carrier group of  claim 1 , wherein a cam guide rail is monolithic to the body of the receiver. 
     
     
         5 . The compact bolt carrier group of  claim 1 , wherein the cam bearing surface does not exceed the front profile of the cam shaft. 
     
     
         6 . The compact bolt carrier group of  claim 1 , wherein the cam guide rail fits in the guide rail slot on the carrier providing stability as a bolt carrier guide rail. 
     
     
         7 . A compact bolt carrier group for a firearm comprising:
 A bolt carrier, a rotating bolt, a cam pin, and a cam guide rail;   Said cam pin protrudes in the upward direction from the bolt carrier,   Said cam pin having a cam bearing surface,   Wherein, said cam bearing surface does not exceed the front profile of the cam shaft.   
     
     
         8 . The compact bolt carrier group of  claim 7 , wherein there is a cam guide rail on each side of the bolt carrier. 
     
     
         9 . The compact bolt carrier group of  claim 7 , wherein a cam guide rail is an insert into the receiver. 
     
     
         10 . The compact bolt carrier group of  claim 7 , wherein a cam guide rail is monolithic to the body of the receiver. 
     
     
         11 . The compact bolt carrier group of  claim 7 , wherein the rotating bolt is compatible with an M4 barrel extension. 
     
     
         12 . The compact bolt carrier group of  claim 7 , wherein the rotating bolt is compatible with a M110 barrel extension. 
     
     
         13 . The compact bolt carrier group of  claim 7 , wherein the operating rod is positioned above the cam pin. 
     
     
         14 . A compact bolt carrier group for a firearm comprising:
 A bolt carrier, a rotating bolt, a cam pin, and a cam guide rail;   Said cam pin protrudes in a generally upward direction from the bolt carrier,   Said cam pin having a cam bearing surface,   Said bolt carrier having a least a first guide rail slot,   Wherein, said first guide rail slot aligns with the cam bearing surface, and   Wherein, the cam guide rail fits in the guide rail slot on the carrier providing stability as a bolt carrier during its forward and rearward travel.   
     
     
         15 . The compact bolt carrier group of  claim 14 , wherein there is a cam guide rail on each side of the bolt carrier. 
     
     
         16 . The compact bolt carrier group of  claim 14 , wherein a cam guide rail is an insert into the receiver. 
     
     
         17 . The compact bolt carrier group of  claim 14 , wherein a cam guide rail is monolithic to the body of the receiver. 
     
     
         18 . The compact bolt carrier group of  claim 14 , wherein the rotating bolt is compatible with an M4 barrel extension. 
     
     
         19 . The compact bolt carrier group of  claim 14 , wherein the rotating bolt is compatible with a M110 barrel extension. 
     
     
         20 . The compact bolt carrier group of  claim 14 , wherein the operating rod is positioned above the cam pin.

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