M1921 Bufffer Pilot & Buffer Assembly

[reconbob]

Hey guys - I am making a Thompson with a M1921 bolt assy.

I have one of Dougs actuators, and I can use the original bolt

and H-lock (right?). But I need to get the correct recoil spring

guide and buffer. I have looked in all the usual places and I

cannot find an exploded drawing or detailed parts inventory.

My understanding is that the M1921 recoil spring fits over

a tube containing a quantity of fiber discs, and that this tube

interlocks with another piece which fits into the buffer pilot

hole in the rear of the receiver.

What is the correct name for these parts and how many

fiber discs go into the tube? Any recommendations on where

to get these parts (repros are ok) would also be appreciated.

 

Many Thanks

 

Bob

Edited April 18, 2010 by reconbob

[bug]

http://i71.photobucket.com/albums/i146/mgbug/IMG_2334.jpg

 

Bob,

 

I assume you mean these.

 

There is of course the 21 actuator, The buffer tube, The spring that goes over the tube and the buffer pilot. The buffer disks pack into the tube and the pilot is inserted there as well. Enough disks are used to provide 0.28" clearence between the pilot flange and the tube flange. The springs are available from Wolff Springs in PA. The tube and pilot are fairly easy to make. I have additional pictures if you'd like. The bolt and H lock are the same as '28. Hope this helps.

 

Bob D

 

 

 

http://i71.photobucket.com/albums/i146/mgbug/IMG_2333.jpg

Edited April 18, 2010 by bug

[darrylta]

Bob,

I would not use the 18 or so fiber disc originally supplied by Colt unless your restoring a non shooter Colt.

PK makes a long urethane 1921 one piece style buffer. It would do a much better dampening job

than the brittle hard red fiber disc.

I'd also wager that PK can make you the buffer tube and pilot as well. If he can't Doug R. makes them.

-Darryl

[Doug Richardson]

Bob,

I would not use the 18 or so fiber disc originally supplied by Colt unless your restoring a non shooter Colt.

PK makes a long urethane 1921 one piece style buffer. It would do a much better dampening job

than the brittle hard red fiber disc.

I'd also wager that PK can make you the buffer tube and pilot as well. If he can't Doug R. makes them.

-Darryl

 

posted by mkw

 

1921 buffers, pilots, and recoil springs are in Doug Richardson's catalog. (www.ThompsonSMG.com)

 

 

[darrylta]

I did some further research, the 21 urethane buffer that PK makes is for the original Colt two part buffer system. The long buffer ( equals the stacked red fiber disc length)

fits inside the original buffer disc housing.

 

I'm looking at DR's catalog, it appears that he does not offer a urethane buffer to fit an original Colt style system. What he does offer is;

 

1. A one piece 1921 pilot that uses a special square urethane buffer that slides on the end of the pilot similar to the GI 1928 system. Set up- $60.00

2. A recoil spring adapter tube that allows the use of a standard 1928 pilot. The tube slides over the pilot and uses a standard red fiber disc buffer.. $15.00

3. A one piece 1921 style pilot that uses a standard red fiber disc. $40.00

 

All three options allow the use of the large dia. 1921 style recoil spring.

 

If you elect to go with either items 2 or 3, I'd use a PK urethane disc buffer with them.

 

-Darryl

 

[darrylta]

I did some further research, the 21 urethane buffer that PK makes is for the original Colt two part buffer system. The long buffer ( equals the stacked red fiber disc length)

fits inside the original buffer disc housing.

 

I'm looking at DR's catalog, it appears that he does not offer a urethane buffer to fit an original Colt style system. What he does offer is;

 

1. A one piece 1921 pilot that uses a special square urethane buffer that slides on the end of the pilot similar to the GI 1928 system. Set up- $60.00

2. A recoil spring adapter tube that allows the use of a standard 1928 pilot. The tube slides over the pilot and uses a standard red fiber disc buffer.. $15.00

3. A one piece 1921 style pilot that uses a standard red fiber disc. $40.00

 

All three options allow the use of the large dia. 1921 style recoil spring.

 

If you elect to go with either items 2 or 3, I'd use a PK urethane disc buffer with them.

 

-Darryl

 

Everytime I read Doug's catalog I see something I missed.

He does offer a new manufactured 1921 original style buffer tube and pilot with a urethane buffer- $85.00

Red original style fiber buffer discs- $4.00 each

-Darryl

 

[reconbob]

Thanks for the info. I just got Doug's catalog #68 so I am on the

case.

 

Bob

[DLansky]

I have one of Doug's reproduction 21 buffer sets and it works flawlessly.

[PK.]

This hybrid pilot will allow use of the 21 spring and 28 buffer; they are in stock for immediate shipment. $50

 

http://www.darklightimagery.net/thompson/diakhybrid01.jpg

 

Photo by Chris Anderson

[giantpanda4]

I have one of these PK hybrids and they work great!!!

It is the fastest and simplist way to get a 21 performance in a 28 and not have to worry about all those fiber washers!