Johnson Semi Auto Rifle

Johnson Rifle Parts


Parts Legend

1. Barrel and collar

2. Receiver

3. Rear sight elevator

4. Rear sight assembly

5. Bolt stop plate and plunger

6. Ejector

7. Ejector pin retainer spring

8. Ejector hinge pin

9. Spring retaining pin

10. Magazine retainer pin

11. Latch spring guide

12. Barrel latch

Johnson Rifle Parts Sidelock Trigger Guard Assembly

13. Return spring plunger

14. Barrel return spring

15. Latch hinge pin

16. Detent retainer pin

17. Detent

18. Detent spring

19. Cross pin, front

20. Cross pin, rear

21. Bolt catch

22. Bolt

23. Bolt stop

24. Firing pin spring

25. Firing pin

26. Operating handle

27. Extractor

28. Locking cam unit

29. Firing pin stop

30. Hinge pin

31. Link

32. Mainspring follower

33. Hammer spring

34. Hammer strut

35. Hammer strut pin

36. Hammer

37. Sear

38. Trigger pin link pin

39. Trigger spring

40. Spring plunger

41. Safety catch cam

42. Trigger

43. Trigger pin

44. Sear stop pin

45. Hammer hinge pin

46. Sear housing

47. Magazine cover hinge pin

48. Magazine cover

49. Magazine cover spring

50. Magazine axis

51. Magazine spring

52. Magazine follower

53. Magazine housing

54. Fore-end

55. Recoil stop screw

56. Recoil stop

57. Recoil stop screw

58. Fore-end screw

59. Washer

60. Buttstock

61. Upper buttplate screw

62. Buttplate

63. Buttplate screw

64. Mainspring tube cap and buffer assembly

65. Mainspring

66. Trigger guard wood screw

67. Trigger guard screw

68. Trigger guard and safety assembly

69. Recoil stop screw

70. Recoil stop

71. Recoil stop screw

72. Stock screw

73. Washer

The Johnson rotary-magazine semiautomatic recoil-operated rifle was invented just prior to World War II by Melvin M. Johnson.

The Netherlands government ordered and obtained 50,000 Johnson rifles chambered for the .30-'06 cartridge. Relatively small quantities of Johnson rifles and light machine guns were also made and issued to the U.S. Marine Corps and Army Special Service Forces. The role of Johnson rifles during World War II was a very minor one by comparison with the Ml rifle which established an unparalleled record.

A few years after the end of World War II, the Netherlands governmentdis-posed of a quantity of Johnson rifles and they became available through Win-

field Arms Corp. of Los Angeles, Calif. In addition to the standard cal. .30-'06 military model, the Winfield firm offered sporterized Johnson rifles which had been restocked along sporting lines. Calibers offered were .270 Winchester, 7 mm. Mauser, and .30-'06.

The strong points of the Johnson semi-automatic rifle were perhaps best summed up by the Army board which tested this rifle in 1940. Their findings: (1) As a machine its performance is satisfactory. (2) It is at least reasonably accurate. (3) It can easily and quickly be disassembled without special tools.

(4) The barrel can be removed in a few seconds for cleaning or replacement.

(5) With a cartridge in the chamber, additional cartridges can be loaded into the magazine, thereby making it possible to keep the magazine always full, time between shots permitting. (6) With a cartridge in the chamber, cartridges may be withdrawn from the magazine individually, thereby making convenient the substitution of a few rounds of a different kind of ammunition. (7) It can endure considerable sand and dust without failure to fire and then reload automatically.

On the critical side the board commented on the 10 lbs. weight of the rifle;liability of the magazine to denting; and single-stage trigger pull. Also, it was not well-suited for use with a bayonet; safety was not foolproof, and magazine might be difficult to load under dusty or sandy field conditions.

Johnson Semi Automatic Rifle SchematicEthan Allen Hoppes Pepperbox AssemblyJohnson Rifle Exploded View

ITo remove the barrel, disengage the barrel latch detent (17) by inserting bullet end of cartridge in the hole in the fore-end as shown. While the detent is depressed, push the barrel back slightly which permits the barrel latch to drop downward on its hinge. If the latch does not fall, assist it to do so by inserting bullet of another round in the hole in the underside of the latch (12). Then press backward on the operating handle (26) with the right forefinger to unlock the bolt from the barrel, and withdraw barrel from receiver.

2 Remove the bolt stop plate (5) by pushing in on the plunger which extends through right rear side of receiver. Use the rim of another cartridge to lift the bolt stop plate out of its slot in the receiver. Then the bolt stop (23) can be removed from the rear of the receiver.

3 Before the bolt assembly can be removed, the link (31) must be disconnected from the mainspring follower (32). Depress the follower with a cartridge or screwdriver and lift up on the link. Then pull the boll assembly back about 2".

5 When reassembling the gun, assemble bolt (22) and firing pin assembly before inserting them in the receiver (2). Be sure cams and rollers line up as bolt slides in. To get bolt forward, depress bolt catch (21) by pushing in magazine cover (48).

4 When the bolt is back 2", grasp the link to hold bolt group in place and at the same time pull up on the operating handle spindle and push operating handle forward until it clears the shoulder in the extractor, then lift out. Lift out the extractor (27). Next, pull rearward on link to remove bolt group from receiver.

6 The buttstock (60) and trigger assembly are retained by the rear cross pin (20). To remove the cross pin, push in on the spring end and rotate it about 45° to the open section on the receiver and pry it out of the receiver. Sliding buttstock and trigger assembly to rear exposes magazine assembly retaining pins. ■

L. C. Smith Double-Barrel Shotgun


LC. Smith shotguns were manufac-# tured by the Hunter Arms Co., Inc., of Fulton, N. Y., beginning about 1889. They were based on models first made about 1880 by the L. C. Smith Co. of Syracuse, N. Y. In its half century of existence, the Hunter Arms Co. also manufactured Fulton, Hunter, and other shotguns, including many private-brand shotguns, for distribution in addition to their L. C. Smith guns.

L. C. Smith double-barrel guns are distinguished among U. S. shotguns by their side-lock construction, in which the lock parts are carried on side-plates inlettcd partly in the action body and partly in the stock. The company early adopted the Baker top-bolt for holding the gun closed. This bolt, later used also by Fox and Ithaca, was a rotating cylinder slotted to engage a heavy extension of the top rib between the barrels, the engaging surfaces being sloped so as to tighten automatically.

L. C. Smith doubles were produced in a wide range of grades, all of the same basic design but differing in accessory features (single trigger, beaver-tail fore-end, and ventilated rib) and in quality of wood and workmanship, including finish and engraving..

At end of World War II the Hunter Arms Co. was bought by Marlin Firearms Co., and under the operating name of L. C. Smith Gun Co. produced a few grades of L. C. Smith guns until about 1950, when production ended.

Limited repairs and restocking to L. C. Smith guns, but not refinishing. are still available from Marlin Firearms Co., Products Service Division. New Haven, Conn.

Parts for many obsolete firearms are available from Numrich Arms Corp., West Hurley, N. Y.

Numricharms Com

IWith gun closed, remove fore-end by pulling front end away from barrels. Press top-lever to right, lower buttstock, and lift barrels off action. Leave hammers cocked. Remove trigger guard screw (49) and unscrew trigger guard (48) counterclockwise

Smith Bridle Screw

3 Remove' lockplate retaining screws (38) from right and left sides of gun (see A) and lockplate connector screw (39) from right side of gun (see B). Right and left locks may now be removed, with slight tapping of frame (10) with heel of hand if required to loosen them. Be careful not to trip sears (44 and 51)

Unscrew Colt New Service

War type) between sear and mainspring (42) and take up all slack. Remove bridle screws (46) at A and B. Do not drift out sear pin C or trigger pin D. Remove bridle, mainspring, and sear as a unit (with vise), and hammer

Smith Top Lever Spring

2 With top-lever (9) moved to rightr remove trigger plate screw (27). Turn gun over and remove trigger plate retaining screws (55 and 61). Remove top-lever screw (56), and entire trigger mechanism may now be lifted away. Do not perform any further disassembly on this mechanism as it requires rather delicate balancing

Shotgun Top Lever Assembly Image

A Up-end frame and firing pins (26) ^ will drop out. Place small steel rod against exposed long end of bolt spring (24) and padded steel bar against frame on opposite side. Apply a C clamp and take up tension on bolt spring. With clamp in place, remove coupler screw (8) and coupler (7), and then top-lever (9). Release tension on bolt spring but do not remove it as it is impossible to replace without a special jig. Bolt (6), trip (5), and trip spring (23) may now be removed

Ancient Trip Hammer Trip Lever

6 Unscrew extractor screw (4) and withdraw extractor. Reassemble gun in reverse order. After top-lever has been connected to its spring, and as trigger plate is being dropped into its recess in frame, a piece of tapered and hardened steel rod must be inserted in top-lever screw hole through clearance hole in trigger plate, and bottom of top-lever forced over until it drops into hole in trigger plate ■

Johnson Semiauto

Parts Legend

1. Barrels

2. Front sight

3. Extractor

4. Extractor screw

5. Trip

6. Bolt

7. Coupler

8. Coupler screw

9. Top-lever

10. Frame

12. Fore-end iron

13. Fore-end spring pin

14. Extractor actuator bar

15. Extractor actuator

16. Extractor actuator pin

17. Extractor actuator spring

18. Rear fore-end screw (2)

19. Fore-end spring

20. Fore-end spring retracting spring

22. Fore-end

23. Trip spring

24. Bolt spring

25. Right lifter

27. Trigger plate screw

28. Left lifter

29. Safety button and pin

30. Safety spring

31. Safety spring screw

32. Trigger plate screw bushing

33. Grip cap

34. Grip cap screw

35. Buttplate

36. Buttplate screw (2)

37. Lockplate, right

38. Lockplate retaining screw (2)

39. Lockplate connector screw

40. Mainspring retaining screw (2)

41. Sear pin

42. Mainspring (2)

43. Hammer, right

44. Sear, right

45. Bridle, right

46. Bridle screw (4)

48. Trigger guard

49. Trigger guard screw

50. Lockplate, left

51. Sear, left

52. Bridle, left

53. Hammer, left

54. Trigger plate

55. Trigger plate retaining screw, front

56. Top-lever screw

57. Trigger pin

58. Selector

59. Safely stud screw

60. Safety stud

61. Trigger plate retaining screw, rear

62. Selector spring

63. Selector spring screw

64. Sear plate

65. Firing plate

66. Spur spring screw

67. Recoil weight spring

68. Recoil weight pin

69. Recoil weight

70. Spur spring

71. Spur link

73. Spur

74. Spur ball

75. Trigger

76. Cocking plate screw

77. Cocking plate

Note: Left lock shown partially assembled for clarity.

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  • Dudo
    How to assemble a jnhnson semi auto rifle?
    10 months ago

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