Unblinking Eye
Remington 51 Prototypes

Prototype and Production Receivers

Prototype Receiver with helical-cut slots to accept barrel lugs in the form of “interrupted threads.”
There is no ejector in the frame.

Production Receiver with two holes to accept the semi-headed pin that holds the barrel in place.

In production receivers, a pivoting ejector was used--it pivoted down to allow the slide to go on the receiver, but was pushed up into position by the top of the magazine. The Colt Mustang uses a somewhat similar ejector.

This patent drawing shows the helical barrel lugs.  It does not show the full number used on production guns, but the intent is clear.

Copyright 2007
by Ed Buffaloe.

 

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