The Caselman air powered machine gun

(Local Cached Copy)

April 7th, 2007 by bobsled

This page contains a list of all parts involved in the construction of the air machine gun. You will want to refer back to this list while browsing the construction diagrams.

Parts List

CR-Cold Roll Steel
MW-Music Wire
01-Oil Harden Tool Steel

1. Firing Valve-CR
2. Firing Valve Stem-Dowel Pin
3. Firing Valve Seat-Ultra high density plastic
4. Firing Valve Body-CR
5. Firing Valve Holding Area-CR
6. Firing Valve Spring-MW
7. Firing Valve Spring Guide-22 ga. CR
8. Firing Valve 0 Ring
9. Striker-01 or CR
10. Cocking Pin-Concrete Nail etc.
11. Cocking Pin Retaining Roll Pin
12. Striker Screws 6-32
13. Striker Follower-D.O.M. Mechanical Tube
14. Striker Follower Sear-01
15. Striker Spring-MW
16. Striker Buffer-Plastic
17. Bolt-01 or CR
18. Bolt Body-D.O.M. Mechanical Tube
19. Bolt 0 Ring-5/16 by 3/16 by 1/16
20. Bolt Pins-3/32 Roll Pins 1/2 long
21. Bolt Spring-MW
22. Spring Follower-CR
23. Breech Plug-CR
24. Breech Plug Screw-1/4 28
25. Receiver-D.O.M. Mechanical Tube
26. Barrel-Select 311 Bottom Groove
27. Barrel Screw-1/4 28
28. Trigger Housing-1 by 1 1/8 by 1/8 Rectangular Tube
29. Trigger Housing Mounting Block Rear-CR
30. Trigger Housing Mounting Block Front-CR
31. Trigger Housing Screws-10-32
32. Trigger Guard-CR
33. Trigger-CR
34. Trigger Frame Block-CR
35. Trigger Stop Screw Adjust-10-32 by 1/2
36. Trigger Stop Screw Setnut-10-32
37. Trigger Pivot Pin-Dowel Pin 1/8 by 1
38. E-Clip Spacers
39. Trigger Spring-Torsion-MW
40. Full Auto Sear Trip-01
41. Full Auto Sear Trip Pin-Dowel Pin 1/8 by 5/8
42. Full Auto Sear Trip Spacer-CR
43. Sear Spring-MW
44. Disconnector-01
45. Sear-01
46. Sear Spring-MW
47. Sear Stop Screw & Set Nuts-6-32
48. Magazine Housing-CR
49. Magazine Release-CR
50. Magazine Release Pin-Dowel Pin 1/8 by 5/8
51. Magazine Release Spring-MW
52. Tank Mount Shader
53. Tank Mount - CR
54. Tank Mount 0 ring - 3/4 X 9/16 X 3/32
55. Tank Mount To Firing Valve Fittings
56. Airline - 1/4 X 3/16 Tube
57. Tank
58. Tank Valve -.CR
59. Tank Valve 0 ring
60. Tank Valve Body - CR
61. Rear Grip Body - CR
62. Rear Grips - Plastic
63. Front Grip Body - CR
64. Front Grip Body Ring - Tube
65. Front Grip Body Strap - CR
66. Front Grips - Plastic
67. Grip Screws Male & Female
68. Magazine - CR
69. Magazine Rear Plate - CR
70. Magazine Bullet Holders Left & Right - 01
71. Magazine Follower - Plastic
72. Magazine Follower Spring - MW

Caliber Change Formula:
Use for shooting similar ballistic bullets. Select telescopic D.O.M. tubes for receiver, bolt and striker assembly for these approx. weights. Bolt weight 40 X bullet weight (varies with barrel length). Striker assembly 85% of bolt weight. Cross section area through firing valve and its orifice should equal 1/2 cross section of bore. Try to keep lengths approx. the same, however lathe action out to allow for a change in the distance the bolt moves before the O ring reaches the loading port, it should be approx. 2.4 X bore dia. Also increase & decrease striker spring tension with bore cross section.

Construction Diagrams & Manufactured examples

Note: To view High Resolution versions, click the image, then click the “All Sizes” option.

Parts:

Firing Mechanism:

Rear Overview:

Poppet Valve Design:

Cock / Hammer:

Bolt:

Barrel:

Barrel Continued:

Magazine Well:

Trigger:

Air Tank Threading:

Grip:

Magazine:

Trigger Mechanics Explanation:

Valve, Sear, Bolt & Barrel (Manufactured):

Magazine, Grips & Springs (Manufactured):

Note: The following photos are from www.thehomegunsmith.com. The webmaster, P.A.Luty sent the Caselman Air Machine Gun construction guide to a fellow gunsmith. The photos illustrate some but not all of the components.

Poppet Valve: