An automatic gun comprises a barrel, a receiver connected to the barrel and a bolt and bolt carrier mounted in the receiver for recoil and counterrecoil movement between the barrel breech and a recoil position rearwardly of a shell pick up position and a casing ejection port. The bolt carrier has a cam track formed along it and the bolt has a pivotally mounted casing extractor and an ejection recess in an opposite region. The forward end of a cam follower is pivotally mounted to the receiver forwardly of the pick up position. The follower has a pair of belt feeding pawls mounted centrally, an inwardly-directed ejection tip at the rearward end and a cam track follower in engagement with the bolt carrier cam track. A belt feeding adaptor is detachably connected to the receiver above the cam follower for receiving an ammunition belt. In response to forward bolt carrier movement, the cam follower is pivoted outwardly, moving the feed pawls into engagement with a belted shell outboard of the pick up position. Corresponding forward bolt movement strips a shell from the pick up position and loads it into the breech. When the bolt carrier recoils after firing, the cam follower pivots inwardly and the feed pawls advance the belt one shell position. As the cam follower pivots inwardly, its ejection tip moves into the ejection recess in the bolt and causes ejection of a shell casing held to the bolt face by the extractor. An ammunition clip adapator is interchageable with the belt feeding adapter.
An improved bolt, bolt carrier and barrel assembly for rifles is described. This invention provides bolt mechanism that has heavier lugs on each side of the extractor to distribute the forces more equally and reliably and thereby reducing firearm failure rate. Moreover, this invention provides a bolt system that is easily adaptable to different ammunition feed devices as well as different ammunition cartridges. This invention further includes a barrel having a barrel extension designed to mate to the symmetrical bolt head lugs of this invention.
A shoulder fired semi-automatic rifle in the bullpup configuration including a housing, a barrel projecting forward from the housing, a bolt mechanism within the housing including but not limited to a firing pin having a system to prevent movement via inertia, a bolt mechanism that utilizes a slidable bolt locking plate and a magazine that works with the bolt mechanism. The trigger and pistol grip are mounted forward of the magazine and ahead of the bolt, the trigger is connected to the hammer sear via a transfer bar linkage.
A readily replaceable bolt face for a firearm (10) with a movable slide (12) that strips a round from a magazine, extracts the spent round from the firing chamber and then ejects the round from the firearm by means of an ejector. A bolt face insert (32) has an external configuration that is common to a range of calibers, but with a bolt face side (66) designed to fit the rim of a specific caliber or calibers having the same rim dimension. The insert may be replaced to fit a different caliber without replacing the slide. The bolt face insert is provided with a slot (62) for the ejector and a groove (60) to accept an extractor for the specified caliber.
A device for use with a weapon having a magazine well for acceptance of a rst munitions magazine of a given capacity. The device includes a bracket having first end sized to replicate the well engaging end of the munitions magazine to permit insertion of the bracket into the well and a second end on the bracket for engagement with a second munitions magazine having a substantially greater munitions capacity than the first magazine. Insertion of the bracket into the well and the second munitions magazine into the bracket permits firing of the full capacity of the second munitions magazine. The preferred weapon for this invention is Model M249 Squad Automatic Weapon ("SAW") or other similar weapons, wherein the first magazine is a 30 round magazine and the second magazine is selected from 100 round and 200 round magazines. The M249 SAW is designed to be carried for use while the operator is standing and also provided with a tripod device for ground mounted emplacement and use.
A firearm comprises an upper receiver body and a lower receiver assembly. The upper receiver body is configured for receiving belt-fed ammunition and the lower receiver assembly is attached to the upper receiver body. The lower receiver assembly includes a receiver body having an accessory mounting structure, a trigger group mounting structure, one of an integrally-formed, non-detachable butt-stock mounting structure and an integrally-formed, non-detachable butt-stock, and one of a hand grip mounting structure and an integrally-formed, non-detachable hand grip.
