# US 11,441,858 B2 · Pistol multi-functional rear rail module

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- Number: US 11,441,858 B2
- Document ID: US11441858B2
- Status: Granted
- Kind: B2
- Application number: 16/892,069
- Filed: 2020-06-03
- Published: 2020-09-17
- Granted: 2022-09-13
- Earliest claimed: 2017-05-12
- Assignees: Polymer80, Inc.
- Applicants: Polymer80, Inc.
- Inventors: David Borges; Loran Kelley; Michael Guttridge; Grant Griffard
- Web page: https://patentgrep.com/patent/US11441858B2

## CPC

- F41A 3/64: Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
- F41A 3/66: Breech housings or frames; Receivers
- F41C 3/00: Pistols, e.g. revolvers (specially adapted for underwater use F41C9/06; for slaughtering or stunning animals A22B; for shooting bolts into concrete constructions, metal walls or the like B25C)
- F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41C: SMALLARMS, e.g. PISTOLS, RIFLES (functional features or details common to both smallarms and ordnance, mountings therefor F41A; projecting missiles without use of explosive or combustible propellant charge F41B); ACCESSORIES THEREFOR

## Abstract

The present invention provides a pistol with a frame having a rear grip, a trigger facility forward of the grip and an upper surface. An elongated slide is connected to the frame and operable to reciprocate along the upper surface. The frame defines a rear recess open at the upper surface. An insert is included having a major portion removably received in the rear recess and having a frame rail extending from the major portion above the upper surface. The frame rail is adapted to connect with the slide to constrain reciprocation.

## Claims

### Claim 1

A pistol, comprising:
a frame having a rear grip, a trigger facility forward of the grip and an upper surface;
an elongated slide connected to the frame and operable to reciprocate along the upper surface;
the frame defining a rear recess open at the upper surface; a unitary insert having a major lower portion removably received in the rear recess and having a pair of opposed frame rails extending from the major portion above the upper surface, the frame rail adapted to connect with the slide to constrain reciprocation; and
the rear recess having a rear wall with a forward-facing wall surface, and the major lower portion of the unitary insert having a rear surface abutting the forward-facing wall surface.

### Claim 2 (depends on 1)

The pistol of claim 1 wherein the rear recess of the frame has opposed parallel sidewalls, and the insert is closely received between the sidewalls.

### Claim 3 (depends on 1)

The pistol of claim 1 wherein the insert has opposed parallel vertical elongated portions connected to each other by a span, and each having a frame rail at its upper end.

### Claim 4 (depends on 3)

The pistol of claim 3 wherein the span connects to a peripheral edge portion of each vertical elongated portion.

### Claim 5 (depends on 3)

The pistol of claim 3 wherein the span and the vertical elongated portions are each planar elements having a common thickness.

### Claim 6 (depends on 5)

The pistol of claim 5 wherein the frame rails have the common thickness.

### Claim 7 (depends on 3)

The pistol of claim 3 wherein each of the vertical elongated portions has a lower end and wherein the span is connected to each of the vertical elongated portions at a location closer to the lower end than to the frame rail.

### Claim 8 (depends on 3)

The pistol of claim 3 further including an aperture defined in each vertical elongated portion adjacent to the lower end, and a corresponding hole in the frame registered with the apertures.

### Claim 9 (depends on 3)

The pistol of claim 3 wherein the vertical elongated portions each have respective front and rear edges, and wherein the recess has respective front and rear ends closely abutting the front and rear edges of the vertical elongated portions.

### Claim 10 (depends on 1)

The pistol of claim 1 wherein the vertical elongated portions have a length greater than a length of the frame rails.