Hybrid metal/polymer pistol frame

1. A combination metal/polymer frame for use with a pistol, the frame comprising:

a) a polymeric frame housing defining a barrel receiving portion and a stock portion; and

b) a metal stock insert secured within the polymeric frame housing, the metal stock insert including:

i) a fire control group portion proportion to receive a pistol fire control group;

ii) an integral upwardly extending platform having a pair of grooves configured to slidably engage a pistol slide; and

iii) a downwardly extending stock extension portion secured within the stock portion of the polymeric frame housing, the stock extension portion including one or more channels configured to slidably engage a pistol main spring housing.

2. The combination metal/polymer frame of claim 1 wherein said stock extension portion includes a pin hole configured to accept a main spring housing pin to secure the main spring housing to the combination metal/polymer frame.

3. The combination metal/polymer frame of claim 1 wherein said metal stock insert further includes at least one pair of opposing stock bushing lobes, each stock bushing lobe configured to engage a respective stock bushing and associated screw to secure a stock member to the metal stock insert and cover the stock portion of the polymeric frame housing.

4. The combination metal/polymer frame of claim 3 wherein said metal stock insert includes an upper pair of opposing stock bushing lobes and a lower pair of opposing stock bushing lobes, a first bushing lobe of each of the upper pair and lower pair of stock bushing lobes located on a right side of the metal stock insert and configured to engage a respective stock bushing and associated screw to secure a first stock member to the right side of the metal stock insert thereby covering a right side of the stock portion of the polymeric frame housing, and a second bushing lobe of each of the upper pair and lower pair of stock bushing lobes located on a left side of the metal stock insert and configured to engage a respective stock bushing and associated screw to secure a second stock member to the left side of the metal stock insert thereby covering a left side of the stock portion of the polymeric frame housing.

5. The combination metal/polymer frame of claim 1 wherein said metal stock insert further includes an elevated plate disposed within and projecting outwardly through a plate opening on said polymeric frame housing.

6. The combination metal/polymer frame of claim 5 wherein said elevated plate is marked with a serial number or other identifier.

7. The combination metal/polymer frame of claim 1 and further comprising:

c) a metal frame insert removably nested within the polymeric frame housing, the metal frame insert defining an opening through which a round is communicated from a pistol magazine to a pistol chamber.

8. The combination metal/polymer frame of claim 7 wherein the metal frame insert includes a beveled feed ramp proportioned to assist chambering the round.

9. The combination metal/polymer frame of claim 7 wherein the metal frame insert includes a front portion adapted to receive a barrel link pin to thereby pivotally mount a barrel link to the frame.

10. The combination metal/polymer frame of claim 9 wherein the front portion of the metal frame insert includes a channel configured to accommodate the barrel link.

11. A combination metal/polymer frame for use with a pistol capable of being selectively modified to chamber and fire rounds having differing calibers, the frame comprising:

a) a polymeric frame housing defining a barrel receiving portion and a stock portion;

b) a metal stock insert secured within the polymeric frame housing, the metal stock insert including:

i) a fire control group portion proportion to receive a pistol fire control group;

ii) an integral upwardly extending platform having a pair of grooves configured to slidably engage a pistol slide; and

iii) a downwardly extending stock extension portion secured within the stock portion of the polymeric frame housing, the stock extension portion including one or more channels configured to slidably engage a pistol main spring housing; and

c) a first metal frame insert removably nested within the polymeric frame housing, the first metal frame insert defining an opening through which a round having a first caliber is communicated from a first pistol magazine to a first pistol chamber,

wherein, the pistol is modified by selectively removing the first metal frame insert from the polymeric frame housing and inserting a second metal frame insert having a second pistol chamber into the polymeric frame housing.

12. The combination metal/polymer frame of claim 11 wherein the first metal frame insert may be removed and the second metal frame insert may be inserted into the polymeric frame housing without requiring modification of the polymeric frame housing, the metal stock insert or the pistol fire control group.

13. The combination metal/polymer frame of claim 11 wherein said metal stock insert further includes an elevated plate disposed within and projecting outwardly through a plate opening on said polymeric frame housing.

14. The combination metal/polymer frame of claim 13 wherein said elevated plate is marked with a serial number or other identifier and wherein the first metal frame insert may be removed and the second metal frame insert may be inserted into the polymeric frame housing without requiring modification of the polymeric frame housing, the metal stock insert, the elevated plate or the pistol fire control group.

15. The combination metal/polymer frame of claim 14 wherein the elevated plate includes an identifier.

16. The combination metal/polymer frame of claim 15 wherein the identifier is serial number.