Buttstock pre-adjustment block

• US 20110283584A1
• Filed: 04/26/2011
• Published: 11/24/2011
• Est. Priority Date: 05/20/2010
• Status: Active Grant

• Current Assignee: Ian Thomas Walters
• Original Assignee: Ian Thomas Walters
• Inventors: Walters, Ian Thomas
• Granted Patent: US 8,397,414 B2
• Time in Patent Office: Days
• US Class Current: 42/73
• CPC Class Codes: F41C 23/04 Folding or telescopic stocks or stock parts articulated or collapsible guns F41A11/04
• CPC Class Codes: F41C 23/14 Adjustable stock or stock parts, i.e. adaptable to personal requirements, e.g. length, pitch, cast or drop
• CPC Class Codes: F41C 23/20 Butts; Butt plates; Mountings therefor F41C23/08, F41C23/10, F41C23/14 take precedence

Abstract

The invention presented here is an add-in part designed for the M4 and similar commercial AR-15 rifle variants or any other weapon using an adjustable multi position receiver extension based on the M4 pattern. Its purpose is to be installed in the longitudinal adjustment slot of the receiver extension tube limiting the buttstock'"'"'s maximum extension travel to a preselected position.

Claims

1. A small structural device including a lower potion and an upper portion.

2. A device of claim 1 where the lower portion is so created that its height and width allow it to fit into the longitudinal slot of an M4 type receiver extension or any of its derivative forms.

3. A device of claims 1 and 2 that has as its lower portion'"'"'s length the approximate distance, measured center to center, of two adjacent locking detent holes on an M4 type receiver extension or any of its derivative forms.

4. A device of claims 1 and 2 that has as its upper portion a protrusion that fits into a locking detent found on the bottom of an M4 type receiver extension or any of its derivative forms.

5. A device of claims 1 and 2 that omits its upper portion and has as its length the approximate distance, measured center to center, of any number of adjacent locking detent holes on an M4 type receiver extension or any of its derivative forms.

6. A device of claims 1 and 2 that has a lower portion smaller than the approximate distance, measured center to center, of any number of locking detent holes and has an upper portion that fits into a locking detent hole on an M4 type receiver extension or any of its derivative forms.

7. A device of claims 3, 4, 5, and 6 that when installed does not protrude below the bottom of the M4 type receiver extension or any of its derivative forms.

8. A device of claim 7 that when installed prevents a buttstock installed thereafter from moving further than desired by preventing the locking pin in the buttstock from moving past the chosen locking detent position during adjustment.