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Crosman 1377 Steel Breech Riser

This is a riser spacer to raise the steel breech of a Crosman airgun


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This is a printable breech riser for the Crosman steel breech.

The included STL is a 5mm riser.

You can customize the riser height in the SCAD. You can also tweak the hole diameters also. 

Keep in mind you will need a longer hammer pin for cocking, and longer screws: the rear is an 8-32, and the tiny one in the loading port is a 4-48.

Materials and methods

-Crosman Steel Breech
-Longer hammer pin
-Longer breech screws (8-32 and 4-48)



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865a353acf17fefcaa2977a63a0955f4?default=blank&size=40Casey Roy added this to the Crosman1377 collection ago
8f4b9c7f29c8bab8980e63cf61094b2e?default=blank&size=40Valeron added this to the Want to make collection ago
B1e5d2d82881c6c179ef909349555ce2?default=blank&size=40chantling added this to the Airguns collection ago
4da27e5ea037d649cfda91aa1840c5fb?default=blank&size=40ApacheXMD commented ago

I raised it up to allow room for a barrel shroud. And yes you do need a transfer port modification. I used the common poly tube mod. It was pretty easy to do.

Mini apophysis 040822 23nabell commented ago

Interesting. It there a particular reason why you would want to raise the breach? Don't you also need a longer transfer port bushing?

4da27e5ea037d649cfda91aa1840c5fb?default=blank&size=40ApacheXMD published this design ago