Buffer System From 1921- Need Help

[Grease Gunner]

The 1921 Used A Two Piece System With the Buffer Disc Inside the Larger Female Piece.First Picture Shows How it SHould Look. Second Picture Shows a Buffer/Pilot on the Left Where the Disc is Worn Out, Leaving You with Metal To Metal Contact When the Spring Compresses,.The Disc is Only about 1/8 inch thick. The Area Inside the Larger Piece is two Inches Longer Than the Male. How Does The 1/8 Inch Disc Seat Inside a two Inch Deep Recess???

[Grease Gunner]

What Timing!!!

 

Just got forwarded an explanation From Tracie Hill.....There are 10 buffers inside the bigger piece. the Inner Part is not supposed to bottom out on the Flange. The Buffers and Oil create a hydraulic cylinder to compress oil and air and buffer recoil all at the same time

[ron_brock]

Now you should do Tracie a solid and buy his book, if youve not done so already. This and so much more is covered in great detail!

 

Ron

[bug]

There should be a stack of those discs in the female part to create a 0,28' gap between the male and female parts. I use urethane discs in mine.

 

Bob D

[Grease Gunner]

The Book is on the top of my nighttable and I peruse it every night!!!

[TD.]

Haris357,

The original 1921 buffer pilot assembly is very serviceable with the proper number of discs and spacing. It was certainly great in its day. However, for today's shooting of 1921 internals, I find the hybrid system manufactured and sold by PK at Diamond K is a much better system. PK told me it is particularly better for West Hurley owners because the hybrid system dissipates the force to the rear of the receiver much more than the Colt's era system. Of course, the receivers on a Colt's and World War II Thompsons are very strong. The West Hurley receivers, not so much.

 

The original 1921 spring is used with the Diamond K hybrid buffer pilot. I don't have current cost information but believe the cost is still under $100.

 

[Grease Gunner]

I like that idea that PK has on the replacement 1921 bufferpilot. I need one setup so I can switch my 1928 WW2 "shooter"

and run it at the 1921 speeds.