Lower receiver for firearm

Abstract

A lower receiver assembly for a firearm is configured to be detachable coupled to a pistol grip and a feed ramp. The lower receiver assembly includes a lower receiver configured to accommodate an upper receiver, a barrel assembly and a magazine. The pistol grip is detachably coupled to the lower receiver. The lower receiver is configured to permit removal of the pistol grip for pistol grip maintenance or pistol grip replacement. The feed ramp is detachably coupled to the lower receiver. The lower receiver is configured to permit removal of the feed ramp for feed ramp maintenance or feed ramp replacement.

What is claimed is: 
     
         1 . A lower receiver assembly for a firearm, configured to be detachable coupled to a pistol grip and a feed ramp; the lower receiver assembly comprising:
 a lower receiver configured to accommodate an upper receiver, a barrel assembly and a magazine;   the pistol grip detachably coupled to the lower receiver; wherein the lower receiver is configured to permit removal of the pistol grip for pistol grip maintenance or pistol grip replacement;   the feed ramp detachably coupled to the lower receiver; wherein the lower receiver is configured to permit removal of the feed ramp for feed ramp maintenance or feed ramp replacement.   
     
     
         2 . The lower receiver assembly of  claim 1 , further comprising a stock interface; wherein the stock interface is configured to be detachably coupled to a stock; wherein the stock interface is configured to permit removal of the stock for stock maintenance or stock replacement. 
     
     
         3 . The lower receiver assembly of  claim 2 , wherein the stock is threaded and the stock interface is threaded to accommodate the stock. 
     
     
         4 . The lower receiver assembly of  claim 3 , wherein the firearm is an MKA 1919 shotgun, the stock is an AR-15 rifle stock and the pistol grip is an AR-15 pistol grip. 
     
     
         5 . The lower receiver assembly of  claim 1 , wherein the pistol grip is detachably coupled to the lower receiver with a single screw. 
     
     
         6 . The lower receiver assembly of  claim 1 , wherein the lower receiver is made from aluminum to prevent wear and tear.