Mossberg 22 LR Micro Click, Peep, Aperture, Receiver Sights

Receiver sights were on 0.625" centers and used 10-32 screw size.

No. 4/S104

Note No.4a Aperture

Mounts to left side of receiver with 2 screws; elevation is adjusted with thumbscrew in conjunction with turning the 1/8 minute click knurled knob to move eyepiece to desired location, then lock into place with thumb screw; windage adjusted by loosening screw in eyepiece to desired setting, turning 1/8 minute knurled knob to move eyepiece to desired setting, retighten eyepiece to lock into place. Windage arm is spring-loaded and will swing out of way to facilitate use of scope or rear sight; black painted alloy; pre 1945.

Detailed Instructions

The graduations on the elevation and windage screws with corresponding clicks, represent 1/8 minute adjustments, equivalent to 1/8" at 100 yards, 1/16" at 50 yards, or 1/32" at 25 yards. It is well to remember to move the rear sight in the direction in which it is desired to move the bullet on the target. If the rifle shoots low raise aperture by FIRST loosening elevation unlock screw slightly then turn elevation adjusting screw to the left or counter clockwise. If rifle shoots high lower aperture by FIRST loosening elevation lock screw slightly then turning elevation screw to the right or clockwise. When proper elevation is located TIGHTEN elevation lock screw. If rifle shoots to left move aperture to RIGHT by first loosening aperture disc, then turn windage adjusting nut to left or counter clockwise. If rifle shoots to right move aperture to left by FIRST loosening aperture disc then turn windage adjusting nut to right or clockwise. When proper windage is located TIGHTEN aperture disc. To swing peep sight out of way, loosen the elevation locking screw and turn peep sight until cross arm is parallel to barrel and then tighten elevation locking screw.

No. 3

Mounts to left side of receiver with a large coin slotted thumbscrew that doubles a elevation lock screw. To adjust elevation loosen the thumbscrew, operate the cam to raise or lower the eyepiece to the desired height and tighten the thumbscrew to lock the setting into place. To adjust windage loosen the windage locknut, screw the windage adjusting nut until eyepiece is in desired location and retighten windage nut. There is an extra aperture included that is stored by screwing onto windage locking nut. Stamped steel and forged construction. Special thanks to Displaced Hoosier for the hang tag instructions.

Detailed Instructions

When sighting a rifle for target work adjust the elevation first. If rifle shoots low, raise the rear sight by loosening elevation lock nut and moving cam to the rear or toward you. One graduation on cam will move the bullet's point of impact approximately 5/16" at 25 yards, 5/8" at 50 yards, and 1 1/4" at 100 yards. When elevation is secured, tighten lock nut.

If the rifle shoots to the left, loosen windage adjustment lock nut and turn the notched nut toward front end of the rifle. If it shoots to the right, turn the notched nut toward you. Then tighten lock nut. One quarter turn or notch is equivalent to approximately 5/32" at 25 yards, 5/16" at 50 yards, or 5/8" at 100 yards.

S-100

Mounts to left side of receiver with 2 screws; elevation adjusted by turning knurled 1/8 minute thimble on elevation staff to correct setting; windage adjusted by loosening eyepiece, turning 1/8 minute knurled knob on windage arm until at correct setting then retighten eyepiece. Stamped steel and forgings.

Detailed Instructions

The graduations on the elevation and windage screw knobs with corresponding clicks, represent 1/2 minute adjustment, equivalent to 1/2" change of bullet impact at 100 yards, 1/4" at 50 yards or 1/8" at 25 yards. It is well to remember to move the rear sight in the direction in which it is desired to move the bullet on the target. If the rifle shoots low, raise the aperture by turning the elevation screw to the left, marked "up" on the elevation nut, or counter clockwise. If the rifle shoots high, turn the elevation screw to the right, or clockwise. If the rifle shoots to the left, move aperture to the right by turning the windage screw to the left, or counter clockwise. If the rifle shoots to the right, move aperture to the left by turning the windage screw to the right, or counter clockwise.

S-108

Mounts to left hand side of receiver with 2 screws. Elevation adjusted by loosening a large thumbscrew on base, manually moving eyepiece to desired height and retightening thumbscrew. Windage is adjusted by loosening the eyepiece, manually moving eyepiece to desired setting and retightening eyepiece. Elevation staff is marked "0,1,2,3,4" with point marks. No other markings, stamped steel construction.

S-130

Detailed Instructions

The graduations on the elevation and windage screw knobs with corresponding clicks, represent 1/2 minute adjustments, equivalent to 1/2" change of bullet impact at 100 yards, 1/4" at 50 yards or 1/8" at 25 yards. It is well to remember to move the rear sight in the direction in which it is desired to move the bullet on the target. If the bullet shoots low, raise the aperture by turning the elevation screw to the left, marked "up" on the elevation nut, or counter clockwise. If the rifle shoots high, turn the elevation screw to the right, or clockwise. If the rifle shoots to the left, move the aperture to the right by turning windage screw to the left, or counter clockwise. If the rifle shoots to the right, move aperture to the left by turning windage screw to the right, or clockwise.

S-330

Mounts to left side of receiver with 2 screws; has longer extension style base to place aperture closer to eye; elevation & windage 1/8 minute adjustable; loosing large locking screw on base allows entire windage arm to be removed from sight base; forged aluminum with steel fittings.

Detailed Instructions

The graduations on the elevation and windage screw knobs with corresponding clicks, represent 1/4 minute adjustments equivalent to 1/4" change of bullet impact at 100 yards, 1/8" at 50 yards or 1/16" at 25 yards. It is well to remember to move the rear sight in the direction in which it is desired to move the bullet on the target. If the rifle shoots low, raise the aperture by turning the elevation screw counter-clockwise. If the rifle shoots high, turn the elevation screw clockwise. If the rifle shoots to the left, move aperture to the right by turning the windage screw counter clockwise. If the rifle shoots to the right, move aperture to the left by turning the windage screw clockwise.

To remove the sight, loosen the lock screw on the rear of the sight and lift straight up on the sight which will slide out of the base. When the sight is replaced in the base and the lock screw tightened the sight will be in the exact same place and no adjustment will be necessary.

S-331

Mounts to left side of receiver with 2 screws; elevation & windage 1/8 minute adjustable; loosing large locking screw on base allows entire windage arm to be removed from sight base; forged aluminum with steel fittings.

Lyman 57MS

Sight features push button quick release; 1/4 minute adjustments & knurled knobs; steel construction; introduced 1938.

Parker Hale PH-16D

Parker Hale PH-16D, Mounts to left side of receiver with 2 screws, fits the Mossberg factory screw hole pattern no drilling or tapping required. This was installed onto some M42MB's as the British thought the No. 4 was an inferior sight. It is micro adjustable and swings out 90 degrees to allow the use of a rear sight. Photo (4) describes the features of sporterized rifles returned to the United States, very interesting. Special thanks to "JFK" a .22 trainer collector for the photos and information.

Williams 5D receiver sights

As per Williams 1972 Catalog

Model 5D-46M will fit: Mossberg 46, 26, 42, 44, 50, 51, 151, 352's

Model 5D-620 will fit: Mossberg 620K's, 640K's, 340's, 342's, 346's, 350's, 351's