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US 12,510,316 B2Granted
Box magazine fed firearm receiver with pinch tabs
AssigneeEight Holdings LLC
InventorTeodor Puha
Life of this patent
Estimating the term…
Abstract
A box magazine fed firearm includes pinch tabs in the receiver of the firearm. In one embodiment, the pinch tabs are opposing pieces of spring steel extending upwardly and inwardly from opposing lateral sides of the receiver. In one embodiment, the pinch tabs are sections of flat spring steel bent into an arcuate shape and secured to the receiver by screws. In one embodiment, tension screws are used to adjust an inward bias of each of the pinch tabs.
Claims17
A firearm comprising:
- a receiver configured to receive a box magazine containing a round of ammunition, receive the round from the box magazine, and provide the round to a chamber of the firearm, wherein the chamber extends along a longitudinal axis of the firearm;
- and
- a pair of pinch tabs extending laterally inward from opposing sides of the receiver, said pinch tabs configured to contact the round and cooperate with rear feed lips of the box magazine to retain the round generally parallel to the longitudinal axis when a bolt of the firearm is in a rear position of the bolt and the box magazine is in the receiver with the round in the box magazine, wherein:
- as the bolt moves from the rear position of the bolt to a forward position of the bolt, the bolt pushes a rear end of the round forward of the rear feed lips of the box magazine such that only the pair of pinch tabs are exerting downward force on the round.
1 more element
A detachable box magazine for a firearm comprising a pair of opposing pinch tabs, said box magazine comprising:
- a main body configured to contain a round of ammunition;
- a follower configured to support the round of ammunition;
- a floor plate enclosing a bottom end of the main body;
- a follower spring configured to extend between the floor plate and the follower to bias the follower and the round of ammunition upward, away from the floor plate;
- rear feed lips at a rear of the main body, said rear feed lips configured to prevent upward movement of the round when the round is in the main body and at the rear of the main body;
- a front feed ramp configured to contact a front of the round and translate forward motion of the round into upward motion;
- a rear feed ramp configured to contact a rear of the round and translate forward motion of the round into upward motion;
- and
- a pair of recesses in the main body forward of the rear feed lips and rearward of the front feed ramp, said pair of recesses configured to receive the pair of opposing pinch tabs when the box magazine is inserted into the firearm and a bolt of the firearm is in a rear position of the bolt.
6 more elements
A firearm comprising:
- a detachable box magazine comprising:
- a main body configured to contain a round of ammunition;
- a follower configured to support the round of ammunition;
- a floor plate enclosing a bottom end of the main body;
- a follower spring configured to extend between the floor plate and the follower to bias the follower and the round of ammunition upward, away from the floor plate;
- rear feed lips at a rear of the main body, said rear feed lips configured to prevent upward movement of the round when the round is in the main body and at the rear of the main body;
- a front feed ramp configured to contact a front of the round and translate forward motion of the round into upward motion;
- a rear feed ramp configured to contact a rear of the round and translate forward motion of the round into upward motion;
- a pair of recesses in the main body forward of the rear feed lips and rearward of the front feed ramp;
- a receiver configured to receive the box magazine containing the round of ammunition, receive the round from the box magazine, and provide the round to a chamber of the firearm, wherein the chamber extends along a longitudinal axis of the firearm;
- and
- a pair of pinch tabs extending laterally inward from opposing sides of the receiver, said pinch tabs configured to contact the round and cooperate with rear feed lips of the box magazine to retain the round generally parallel to the longitudinal axis when a bolt of the firearm is in a rear position of the bolt and the box magazine is in the receiver with the round in the box magazine, wherein:
- the pair of recesses in the main body of the box magazine are configured to receive the pair of opposing pinch tabs when the box magazine is inserted into the firearm and the bolt is in the rear position of the bolt.
10 more elements
Dependencies are inferred from the claim text.