Means for converting semi-automatic firearm to pump-action rifle
OwnerDouglas Martin Hooninventor
Life of this patent
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Abstract
The invention comprises various minimal modifications to the upper receiver assembly of an AR-platform semiautomatic firearm whereby the firearm is reversibly converted to a pump-action firearm. The modifications comprise a means to introduce a push rod which passes through the front end of the upper receiver and connects a pump hand grip and the bolt carrier group of the firearm. The pump hand grip is guided and supported by the barrel and by a secondary guide rail disposed above the barrel.
Claims6
A kit of parts for converting a semiautomatic AR-platform rifle having an upper receiver assembly including a receiver, a barrel and a bolt carrier, to a pump-action rifle, comprising:
- a guide rail mounted along an axis parallel with the barrel and comprising a slot for receiving and guiding a pump hand grip;
- the pump hand grip coaxially and slidably received by the barrel, said pump hand grip including a rectangular protrusion received by the slot in the guide rail to prevent rotation of said pump hand grip relative to the barrel;
- a push rod which connects the pump hand grip with the bolt carrier;
- a bolt carrier key joined to the push rod;
- at least one threaded fastener
- a turnbuckle nut for attaching the push rod to the threaded fastener of the pump hand grip;
- a modified gas block;
- and
- an aft support.
A system for converting a semiautomatic AR-platform rifle having an upper receiver assembly including a receiver, a barrel and a bolt carrier, to a pump-action rifle, comprising:
- a guide rail mounted along an axis parallel with the barrel and comprising a slot for receiving and guiding a pump hand grip;
- the pump hand grip coaxially and slidably received by the barrel, said pump hand grip including a rectangular protrusion received by the slot in the guide rail to prevent rotation of said pump hand grip relative to the barrel;
- a push rod which connects the pump hand grip with the bolt carrier;
- a bolt carrier key joined to the push rod;
- at least one threaded fastener;
- a turnbuckle nut for attaching the push rod to the threaded fastener of the pump hand grip;
- a modified gas block;
- and
- an aft support.
Dependencies are inferred from the claim text.