Hooded Reduced Apertures M1 / M14 for USGI sights


0.042″ diameter hooded apertures for USGI sights on the M1 Garand or M14.  Non-rotating.

In stock


0.042″ diameter hooded apertures for USGI sights on the M1 Garand or M14 increase your depth of field, and help your eye focus on the front sight.  These hooded apertures are a simple swap into a USGI sight base.

A lot of people want to swap their 0.070″ opening M1 or M14 aperture to a hooded aperture with a smaller opening, but find out that the large diameter NM hoods for the M14 do not fit properly with a USGI sight base.  The crescent shaped cutout in the sight base is a little smaller than the hood diameter, so the hood bumps when you lower the sight, preventing you from getting to a 200 yard elevation.  The solution is to also buy a NM sight base with a bigger cutout, however these typically have finer thread pitch for windage, so you also have to buy a NM windage knob.  What started out to be a simple upgrade ends up at $200.

So I made these apertures for people who do not want an entire NM setup, but a simple hood/aperture conversion for the USGI sight they have.  These are USGI aperture racks, drilled and tapped to fit a screw-in 0.042″ diameter hood.  Because they are USGI, not NM, they are a slip fit into a USGI sight base with no stoning required.

These do NOT have the 1/2MOA rotating hood, these hoods are fixed, so they remain a 1 MOA/click sight.  However the advantage is that the hoods are smaller diameter, so you can run the elevation all the way down in a USGI sight base without the hood ‘bumping’.  Bottom line, you can get a hooded, reduced aperture sight that is a drop-in swap for your USGI sight, without having to upgrade to the expensive NM sight base to allow room for the hood to fit.

–          New/Old Stock USGI aperture rack (1953 Springfield).

–          0.042″ diameter hood.

–         Drop-in part.  No fitting or modification required.

–          Note, these are NOT legal for the M1 ‘As Issued’ class.

 Link to CMP disassembly procedure for the rear sight

Additional information


.0.042", 0.047", 0.052"


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