HAND GUARD ATTACHMENT SYSTEM FOR FIREARMS

• US 20100319231A1
• Filed: 06/22/2010
• Published: 12/23/2010
• Est. Priority Date: 06/22/2009
• Status: Active Grant

• Current Assignee: REM TML Holdings LLC
• Original Assignee: RA Brands LLC (RA Factors, Inc.)
• Inventors: Matteson, David O., Stone, Jeffrey W.
• Granted Patent: US 8,726,557 B2
• Time in Patent Office: Days
• US Class Current: 42/71.01
• CPC Class Codes: F41C 23/00 Butts; Butt plates; Stocks handles for carrying smallarms F41C33/08
• CPC Class Codes: F41C 23/16 Forestocks; Handgrips; Hand guards pump-action guns F41C7/02
• CPC Class Codes: F41G 11/003 Mountings with a dove tail element, e.g. "Picatinny rail systems"
• CPC Class Codes: Y10T 29/49826 Assembling or joining
• CPC Class Codes: Y10T 29/49963 Threaded fastener

Abstract

A hand guard attachment assembly for a firearm having a barrel and a receiver fastened to the barrel by a barrel nut. The hand guard attachment assembly includes a forearm having a monolithic mounting rail/hand guard that is removably connected to the receiver. The monolithic rail/hand guard interfaces with an integral multi-slot mounting portion of the receiver. A cinch block is mated to the slots of the receiver and held in place by the monolithic rail/hand guard. A tension block is mated at one end of the monolithic rail/hand guard and is attached to the cinch block by a fastener to securely hold the monolithic rail/hand guard in place.

Claims

1. A firearm comprising:

a receiver having an integral multi-slot mounting portion on a top surface;

a barrel removably connected to the receiver;

a forearm including a monolithic mounting rail/hand guard removably connected to the receiver wherein the monolithic rail/hand guard interfaces with the integral mounting portion of the receiver;

a cinch block mated to the slots of the receiver and held in place by the monolithic rail/hand guard;

a tension block mated at one end of the monolithic rail/hand guard and attached to the cinch block by a fastener.

2. The firearm of claim 1 further comprising a barrel nut to fasten the barrel to the receiver.

3. The firearm of claim 2 further comprising at least one mounting bolt that passes through a hole in the barrel nut into a threaded hole in the forearm to affix the monolithic accessory device monolithic rail/hand guard to the firearm.

4. The firearm of claim 1 wherein the integral multi-slot mounting portion of the top of the receiver comprises a Picatinny rail.

5. The firearm of claim 4 wherein the monolithic rail/hand guard comprises an integral female Picatinny mount that interfaces with the Picatinny rail surface on the top of the receiver.

6. The firearm of claim 1 wherein the cinch block comprises a plurality of projections that interfaces with a plurality of slots on the end of the receiver.

7. The firearm of claim 1 wherein the cinch block and tension block hold the monolithic rail/hand guard in a fixed position during operation of the firearm.

8. A hand guard attachment assembly for a firearm having a barrel and a receiver fastened to the barrel by a barrel nut, the hand guard attachment assembly comprising:

a forearm including a monolithic mounting rail/hand guard removably connected to the receiver wherein the monolithic rail/hand guard interfaces with an integral multi-slot mounting portion of the receiver;

a cinch block mated to the slots of the receiver and held in place by the monolithic rail/hand guard;

a tension block mated at one end of the monolithic rail/hand guard and attached to the cinch block by a fastener.

9. The hand guard attachment assembly of claim 8 further comprising at least one mounting bolt that passes through a hole in the barrel nut into a threaded hole in the forearm to affix the monolithic rail/hand guard to the firearm.

10. The hand guard attachment assembly of claim 8 wherein the monolithic rail/hand guard comprises an integral female Picatinny mount that interfaces with a Picatinny rail surface on the top of the receiver.

11. The hand guard attachment assembly of claim 8 wherein the cinch block comprises a plurality of projections that interfaces with a plurality of slots on the end of the receiver.

12. The hand guard attachment assembly of claim 9 wherein the cinch block and tension block hold the monolithic rail/hand guard in a fixed position during operation of the firearm.

13. A method for mounting a hand guard attachment assembly to a firearm, comprising:

providing a firearm having a receiver with an integral multi-slot mounting portion and a barrel;

mating a cinch block to the slots of the receiver;

mounting a forearm including a monolithic mounting rail/hand guard to the receiver, wherein the monolithic rail/hand guard interfaces with the integral multi-slot mounting portion of the receiver;

mating a tension block at one end of the monolithic rail/hand guard and attaching the tension block to the cinch block by a fastener.

14. The method of claim 13 further comprising fastening the barrel to the receiver using a barrel nut.

15. The method of claim 14 further comprising attaching the monolithic rail/hand guard to the firearm with at least one mounting bolt that passes through a hole in the barrel nut into a threaded hole in the forearm.