updated March 20, 2012

Calico M-100 & Variants
M-100 M-100FS M-100S M101 M-106
(see the
M-110 & M-105 pages also)

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Complete Guns & Ammo October 1986 article reviewing the M-100

This is the article that got me hooked! It's three GIF pages. You can save them to your hard drive for easier viewing later. 1 | 2 | 3

Notes: For a pictures of how the scope mounts, see the M-105 page. Better feeding tips for the M-100 (and all Calico .22LRs) are found below, too!


M-100 carbine


click on this photo to view full-sized in a new window
(click on photo above to view full-sized in a new window)
fully accessorized with bipod, flashlight, sling, and scope

SPECIFICATIONS  

  • caliber  .22 caliber long rifle only
  • capacity  100 rounds helical feed magazine
  • action  blowback
  • rate  semi-automatic
  • barrel  16.25" heat-treated 4140
  • rifling  6 lands and grooves, 1 twist in 12 inches
  • receiver  prime cast A-356 aluminum T-6 temper
  • furniture  glass-filled Minlon, impact-resistant with pistol grip storage compartment
  • sights  notch rear, front post (windage & elevation)
  • safety  ambidexterous, trigger and hammer block
  • height  7.3 inches (185mm)
  • width  2.2 inches (56mm)
  • weight  5.7 pounds (2.59k) loaded with 100-round magazine
  • length  29.8 inches (757mm) with buttstock folded
  •              35.8 inches (909mm) with buttstock extended
  • manufactured 1986-1994

Is your M-100 having problems feeding ammo into the chamber? Here's how I fixed mine.

BE VERY CAREFUL! YOU'RE ON YOUR OWN HERE!I removed the barrel and used a small triangular file to slowly round the upper edge of the breech (see drawing). This created a very small, rounded feed ramp. Next I polished the area with 000 steel wool to make it very smooth. I then ran a brass cleaning brush through the barrel twice, and cleaned the barrel as I would normally. 

I found it necessary to file and polish a bit more after the initial work. Then after cleaning it again, I loaded a half-dozen rounds into the magazine, wound it up, and (with safety on) I worked the bolt. The new feed ramp allowed the M-100 to strip, chamber, and eject all the rounds properly. 

I then loaded the magazine and did a shooting test. The gun went on to shoot 400 rounds of randomly-selected ammo types flawlessly. I fixed the thing in less than an hour. It shoots anything I feed it, and I can finally achieve a rate of fire that sounds like a small machine gun! I like it! 

Note: The area I filed and polished was a bit smaller then the outline shows. It doesn't take much. I was very careful not to scratch the chrome bore lining farther down than the area I filed. This may work on other guns, too. Your mileage may vary!

M-100FS carbine
Current MSRP $504.00

SPECIFICATIONS
click to view full-sized photo


click to view full-sized photo

  • caliber  .22 caliber long rifle only
  • capacity  100 rounds helical feed magazine which can be stored loaded
  • action  blowback
  • rate  semi-automatic
  • barrel  16.25" heat-treated 4140
  • rifling  6 lands and grooves, 1 twist in 10 inches
  • receiver  aluminum alloy
  • furniture  glass-filled Minlon, impact-resistant with pistol grip storage compartment
  • sights  notch rear, front post (windage & elevation)
  • safety  ambidexterous, trigger and hammer block
  • height  6.9 inches (175mm)
  • width  3.1 inches (78mm)
  • weight  5 pounds (2.26k)
  • length  36 inches (915mm)
  • introduced 1996, available through your gun dealer at $504.00 suggested retail

M-100S carbine
precursor to the M-105

M-101 & M-106

According to the Blue Book of Gun Values, these models were advertised, but never manufactured.