4‐Feb‐2010 

 

This document represents a work of fiction.  Any resemblance to real life is 

purely coincidental or imaginary.  I don’t even know who wrote this to blame 

things on.   This work is meant to be fun or potentially educational.  It is not 

meant to be in any way instructional.   

Copy at your own risk. 

 
Draft Drawings 

These are draft drawings for a single shot blowback .22 short pistol current as of 4‐Feb‐2010.  There are 
several cleverly hidden, deliberate, dangerous mistakes included in the drawing.  If you believe you have 
discovered any of these: 

Please post comments if any to this fan‐fiction page 

http://www.homegunsmith.com/cgi ‐
bin/ib3/ikonboard.cgi?s=9c495948cdb43a025b6c1cc341e2b1cc;act=ST;f=3;t=23671

 

Final drawings along with a few build pictures will be forthcoming assuming that everything is able to be 
made functional and it appears reasonably safe in the hands of a reasonable person. 

These drawings are extremely draft so it would be best to wait until they are final before spreading 
them too far over the internet.   I expect there will be several other drafts before a final. 

 

 

This document represents a work of fiction.  Any resemblance to real life is 

purely coincidental or imaginary.  I don’t even know who wrote this to blame 

things on.   This work is meant to be fun or potentially educational.  It is not 

meant to be in any way instructional.   

Copy at your own risk. 

 

.875

.625

1.255

.125

Single Shot Blowback

SHEET 1 OF 1

SCALE: 2:1

A

SIZE

MATERIAL: Cold Rolled Steel

5

15-June-2009

Barrel Lug

.188

.592

.750

.625

5

SIZE

Single Shot Blowback

SHEET 1 OF 1

SCALE: 1:1

A

MATERIAL: O1 Steel

15-June-2009

Bolt

1.090

1.750

2.500

2.250

8.00°

.106

.035

.020

.026

.250

.144

.630

.125

.213

.030

.986

Single Shot Blowback

SHEET 1 OF 1

SCALE: 2:1

A

SIZE

MATERIAL: O1 Steel

5

15-June-2009

Bolt Handle

.188

.250

.500

.125

.632

.750

.193

.316

.250

.316

.125

.632

.875

.126

.144

.158

SHEET 1 OF 1

Single Shot Blowback

SCALE: 2:1

A

SIZE

MATERIAL: O1 Steel

15-June-2009

5

End Cap

.125

.375

.500

.154

.107

.107

.875

.125

.040

SHEET 1 OF 1

Single Shot Blowback

SCALE: 8:1

A

MATERIAL: O1 Steel

SIZE

5

15-June-2009

Front Sight

.625

.875

.465

.375

.188

SHEET 1 OF 1

Single Shot Blowback

SCALE: 1:1

A

SIZE

MATERIAL: 7075-T6 Aluminum

15-June-2009

5

Lower Receiver

.219

.260

1.083

4.208

.750

1.958

2.520

3.828

R.125

.125

.500

.188

2.118

.320

.770

30.00°

4.968

2.145

1.250

.726

3.829

1.145

15-June-2009

SHEET 1 OF 1

Single Shot Blowback

5

SCALE: 4:1

A

SIZE

MATERIAL: O1 Steel

Rear Sight

225.00°

.050

.250

.125

.211

.557

.090

.250

.104

.150

.500

.300

.089

.454

.125

.557

.563

15-June-2009

5

SHEET 1 OF 1

SCALE: 4:1

A

SIZE

Single Shot Blowback

MATERIAL: O1 Steel

Safety Detent

.450

.500

.400

.217

.150

.125

.075

SHEET 1 OF 1

Single Shot Blowback

SCALE: 4:1

A

SIZE

15-June-2009

MATERIAL: O1 Steel

Safety Cross Pin

.345

.525

.125

.250

.900

.079

R.047

each end of detent

Plunge 0.020" on

Cut with 1/8" endmill

.525

.375

.125

.375

.031

.088

.500

Single Shot Blowback

SHEET 1 OF 1

SCALE: 2:1

A

SIZE

15-June-2009

MATERIAL: O1 Steel

Sear

.063

.063

.130

1.500

.375

.438

.050

.050

.545

.063

1.246

.295

.063

Single Shot Blowback

SHEET 1 OF 1

SCALE:2:1

A

SIZE

MATERIAL: O1 Steel

15-June-2009

5

Trigger

.250

.125

.125

.188

1.750

.188

Single Shot Blowback

15-June-2009

SCALE: 1:1

A

SHEET 1 OF 1

7075-T651

MATERIAL

SIZE

5

Trigger Group Housing

.497

2.000

.332

.250

.734

.984

1.500

2.125

.125

.113

2.625

2.875

.395

.364

.238

.063

1.875

2.125

.235

.625

1.500

2.625

.188

.175

tap #2-56 UNC

1.513

.316

.073

.316

.625

.888

R.188

.250

4.267

.550

4.967

.375

.130

R

.725

1.992

3.267

.100

.635

.875

.193

.135

R

.949

1.874

SHEET 1 OF 1

Single Shot Blowback

SCALE: 1:1

A

SIZE

MATERIAL: DOM Tube

15-June-2009

5

Upper Reveiver Tube