Full Auto Ruger 10/22 Conversion Manual 0879472618, 9780879472610

Citation preview

FULL AUTO Full Auto Conversion Of The Ruger 10-22

ft RUGER

Semi-Automatic

10/22

FULL AUTO CONVERSION MANUAL

Carbine

Full Auto Ruger 10/22 Full Auto

WARNING

Conversion Manual

!

The legal construction and possession of a fully automatic weapon is controlled by the Bureau of Alcohol, Tobacco, and Firearms division of the U.S. Treasury Department. Proper application to the B.A.T.F., authorization, and permission must be secured before

constructing

this

or

any

other

similar

Local and state laws vary and may restrict ship of this or similar type weapons.

device. owner-

Severe penalties are authorized for violators of these laws. Minuteman Publications offers this information for academic study of firearms design and disclaims any responsibility or liability for the improper or illegal use of this or other similar devices.

Table

Of

Contents

CONTENTS

PAGE

WmtrOductiOn:

sscsc ccseucctacasetanenvscvewer we 7

Chapter 1 Sequence

of Operation

Chapter 2 Parts To

Be

Chapter 3 Parts:-16

Be: Modified: .cci ccicvcncecs wens 19

Removed

.........sseeeeeeees 9 Semi-Automatic....... 17

Chapter 4 Parts To Be Manufactured PATES

LiSU

nse

............0005 29

e acc cceee bec ne eases

nn cle'sis(s cis 39

Introduction

the

data

The purpose of this manual and instructions necessary

required

for

conversion

10-22, semi-automatic fire automatic unit.

When

modified

the

weapon

of

operation

carbine,

to

the

retains

and

its

also

Ruger

10-22

weapons

the a

Ruger

selective

specifications

given,

semi-automatic

the

are

fully

selector

made

and has become one of the of its type in the world.

These

of

into

allows

functioning by moving the proper position.

The

is to provide manufacturing

its most

mode

automatic lever

debut

in

popular

logical

into

1964,

firearms

choices

for

automatic conversion because they have proven themselves to be well made, very rugged, maintain a relatively light weight, and are adaptable to many different sighting arrangements.

The

Ruger

to purchase,

to

many

economy.

run

in

condition

10-22

thereby

persons New

the used

approximately

is

an

economical

increasing

hampered

prices

$90.00

for

to

carbines

$45.00

its

by the

the

can

to $75.00.

struggling

standard

$110.00 be

weapon

availability carbine

range. purchased

Good for

Another distinct advantage of is that ammunition expenses are minimum when compared to various systems.

its

The power

.22 and

L.R. range,

mode, the 10-22 many applications.

cartridge but in the

is

a

The weapon is well construction and use.

configurations flexibility

are

for

Numerous

available for EATON SUPPLY,

high

MITCHELL 50 rd., and drum magazines provide

over

the standard

weapon

providing

Sequence

Operation

greater

A look through the accompanying drawings will give the exact orientation and relationship of the parts controlling the firing cycle.

use.

To achieve magazines

are

the Ruger 10-22. rd., CONDOR 25

The rd.,

THOMPSON style 50 rd., much greater flexibility

10 rd. magazine.

Of

for

adaptable to silencer Many various stock

capacity

use with INC. 25

is limited in fully automatic

formidable

available,

intended

the system held to a centerfire

positive

and

reliable

functioning,

the trigger group for the select-fire Ruger 10-22 was redesigned incorporating the basic design of the Belgian FN-FAL and West German HK-G3. battle rifle families. Both of these weapon systems and reliability. The

modified

are

legendary

in

still

retains

10-22

performance the

clos-

ed-bolt mode of operation. When firing the modified ing sequence of events occur:

(1)

weapon,

the

follow-

COCKING THE WEAPON

1. Assuming there is a loaded magazine in place, the user retracts the bolt handle (and bolt assembly) which rotates the hammer rearward. This

action

compresses

the

recoil

spring.

2. As the hammer almost completes its rearward rotation, the bottom of the hammer contacts the top of the disconnector which in turn pivots downward, releasing the sear to rotate upward into position against the hammer. The engagement between the hammer and sear is not yet set at this time because the hammer is fully rotated rearward. 3. During this same initial rearward movement of the bolt and hammer, the release lever and catch also move rearward slightly. The travel of these parts is limited by the ejector pin

which

is positioned

through

a slot

in the

the

‘burst’

notch.

4, When the bolt is fully retracted, released. Recoil spring tension then it forward.

it is propels

a

As live

the

bolt

cartridge

to chamber

it.

is from

moving the

forward, magazine

moved

slot machined in the bottom the bolt continues forward

the

release with roll out

(Both

the

catch

common

pin).

At

this

rearward)

lever

engagement positioned the catch

(2)

point,

makes

rotates

contact

with

of the motion,

forward.

Through

the catch by means of a laterally pin, the release lever rotates of engagement with the hammer.

and

release

the weapon

is

lever

ready

pivot

to

on

a

fire.

it

strips

and

begins

SEMI-AUTO FIRE

1. The position

weapon is now in a loaded and cocked as established in the sequence above.

2.

safety

The

position. modification

By

5. At this same instant, the hammer (released from contact with the bottom of the bolt) rotates forward slightly and securely engages the sear and catch, (both previously positioned) in their respective engagement notches.

6.

previously

a radiused bolt. As

release

lever. Both parts have independent § torsion springs which forces them to rotate rearward. The stationary arm of these springs locates against the ejector pin. As the bolt and hammer complete their rearward travel, the engagement surface of the catch is against the hammer ready

to engage

7. At a given point just before the bolt closes completely, the top of the release lever (having

moving

should

now

(The

safety

and

functions

the

of the sear is downward travel

safety provided when the

be

is to

to

the

unaltered

moved

in

identically

“OFF,”

the

as

"OFF"

this

before.

lower

lug

with clearance to enable trigger is depressed).

3. The selector lever must be positioned in the rearward, or “semi” position. In this position a lug on the bottom of the selector lever pivot will be positioned in a downward position and will limit the upward travel of the rear section of the trigger.

4.

Depress

sear

and

spring

The

during

the

the

the

bolt, the

moves

fired

from

striking

detonating

5.

trigger,

hammer

hammer, spring,

of

the

the

under rotates

firing

pin

cartridge.

on

resultant

rearward,

releasing

The

rear

acting

cartridge

thereby

engagement.

tension

forward

and

the

hammer

The

the

pressure

explosion

extracting

and

of

generated the

4.

with

the

hammer

(as

previously

the

(3)

and

sequence

then as

depress

it

again

to

resume

described.

FULL AUTO The

weapon

(as described 2.

The

in #2-2).

is

in

a

loaded

and

cocked

position

(as

described

depressed

of

the

trigger,

thereby

releasing

and

engagement

(as

cartridge

the

resulting

described

The trigger remains depressed as the 5. ejecting and extracting rearward, cycles fired case (as described in #2-5). The

rearward

release

lever

(as described

and

catch

have

in

in

bolt the

rotated

in #1-3).

7. At the rearmost travel of the bolt and hammer, the disconnector pivots downward and releases the sear to pivot upward. However, because further rotated has assembly trigger/sear the down than it did in the "semi" mode, the sear is not high enough to engage the hammer. The catch securely engages the hammer “burst notch,” thereby holding the hammer rearward as the bolt

begins 1.

depress

hammer-sear

detonation #2-4).

6. 7. Forward bolt travel performs the same functions as previously described. For another shot to be fired, the user must release the

trigger

Fully

the

6. As the bolt moves rearward, the release lever moves as previously explained. As the bolt completes rearward travel, the disconnector disengages the sear enabling it to be in position

be

can

position

this

in

trigger

further.

detonation,

ejecting

case.

for re-engagement described).

in be positioned must lever selector The 3. In this posithe forward or 'BURST' position. selector of the bottom the on lug the tion, lever pivot has rotated rearward enough to avoid contacting the upper, rear area of the trigger.

a live

forward

travel,

stripping

and

chambering

cartridge.

in #1-7).

safety

is

moved

N

"OFF"

8. At the instant before the bolt closes completely, the release lever contacts the bolt,

pivots forward and described in #1-7). to strike the firing tridge.

disengages the catch (as This allows the hammer pin and detonate the car-

13

This

cycle

is

repeated

until

the

trigger

is released. The sear can then rise, intercept the hammer, and interrupt the firing cycle.

SEMI-AUTO FUNCTIONING Selector is set at "SEMI". Bolt is in closed position.

Hammer

is cocked, lever

Release

Safety

*

and

sear engaged. catch

Moving will

pivoted

forward.

safety to "OFF" and depressing fire

FULL

trigger

weapon.

OPERATING

14

have

"ON".

SCALE

SEQ

ENCE DRWG.

NO.

[4

FULL-AUTO Selector is set Safety "OFF".

Weapon

at

FUNCTIONING

has fired and bolt

is moving

forward

recoil spring tension. Trigger is fully depressed, lowering low enough to not engage hammer.

Release catch

lever and catch is engaging

2

"BURST".

burst

have moved

the

under

sear

rearward

Parts

To Be Removed Semi-Auto

nose

and

notch.

Due the Ruger nate the

to

the

design

and

characteristics

10-22, it has been necessary use of the bolt lock, and

of

to elimibolt lock

spring. This

was

necessary

because

the

release

lever, release lever spring, catch, catch spring, and pivot pin occupy the space where these parts

originally are All sion.

When bolt contacts and trips the catch assembly, the hammer falls ridge.

OPERATING FULL

SCALE

release lever and to detonate cart-

SEQUENCE | DRWG

NO. 15

other

located. components

are

used

in

this

conver-

PARTS TO BE REMOVED FOR SELECT

FIRE

10-22 CONVERSION

3 Parts To Be

Modified

For select-fire conversion of the Ruger 10-22, minor modifications to six parts of the standard carbine is required. The modifications and purpose of each is described below. 1.

Receiver- Drawing # 1. The receiver requires drilled detents, as to securely

selector

44)

2.

1/16"

x

.030

deep

in such a manner position of the

lever.

Trigger Housing- Drawing # 2. The trigger housing requires that a 1/8" hole be drilled through the housing as indicated. This facilitates assembly of the catch/release lever assembly. Also, a 7/32" hole and 9/16" long x 1/8" wide slot is required as indicated to allow assembly of

3.

two

positioned locate the

the

Stock-

selector

Drawing

lever

assembly.

# 3.

The stock must be altered as shown to allow clearance for the selector lever assembly.

Bolt

#1 Lock Spring

#2 Bolt

Lock

19

Bolt-

Drawing

# 4.

The bolt requires a slot to be machined or cut into the bottom as indicated. This provides a contact surface and proper timing for contact with the release lever.

Trigger- Drawing # 5. he trigger requires to

the must

be

made

in

disconnector be

filed

further rotation The drawing can location. Also,

the

a

small

upper,

pin (as

rear

hole.

is epoxied in position in position indicated. This

cut

portion

near

The

indicated)

of the be used a small

clearance web to

1,050

1,000

area

provide

trigger assembly. as a template for .150 x .030 shim the slot at is necessary

limit the upward travel of the sear it disengages from the disconnector.

the to

when Selector

Hammer- Drawing # 6. A “BURST” notch is cut into the hammer as indicated. This engages the catch when assembled.

Drill deep

Positioning

1/16"

diameter

Detents x

RECEIVER —FA FULL

SCALE

DRWG_

NO.

|

.030

625

2.875

wh “I

125

———————}

=

fo

EF

1430 —e> a

A

me

a ei

NS

an

Ke

—

(9375)

>

:

: 562

Drill meter

.

trigger

Drill 7/32"hole (.2187) diameter through right trigger

le

FULL

housing

dia-

(for

housing only

Reretae

TRIGGER

(.125) a

R. Lever & Catch Pivot Pin)

Selector Assembly is installed in by aligning the lugs and slot and

SSer

1/8" hole

cowards

HOUSING

SCALE

Trigger Housing inserting. Sel-

Inlet stock Assembly.

90".

— FA,

DRWG

NO. 2

in

this

area

to provide

for

Selector

STOCK FULL

SCALE

| DRWE

NO.

3

i

Depth

150 |

of Slot =I

7

|

The

3

LW

700 RADIUS [R= 2.975. me

.200

Thickness

of

NOTE ON BOLTS bolt

design

for

the

Ruger

iged at some point. Below are each. For this modification, ised or

interchanged.

Old

Style

Bolt

New Style

Bolt

.080

Slot

SS Diagonally shaded area of underside of bolt.

represents

CTIVE

BOLT — FA, SEL FULL

the

DRWG.

SCALE 24

flat

surfaces

FIRE

NO

4 25

10-22

was

shown examples each bolt can

Epoxy

150 X 030 File

web

down

in

this

the

shim

in

this

area.

r

TRIGG | wu, ER soeFA

area.

.025

}

| pewo No 90°

ae’

—

750 =

~!

Burst

Notch

is to be ground

to the dimensions

Jp (125) PIVOT _PIN—CATCH REL. LEVER FULL SCALE | DRWG NO. 5

__ HAMMER FULL

FA

SCALE

DRWG._ 27

NO.

6

shown.

4 Parts

To

Be

Manufactured

The following are the new parts required for select-fire conversion of the Ruger 10-22. Materials for their construction are also included.

1.

Release The

Lever-

release

Drawing lever

# 7.

is

designed

to

be

made

from .050 thickness steel sheet metal. This part has a "tab" which is bent around almost double, providing a notch for location of the The

working arm of overall shape

using

the

drawing

the release lever spring. can be transferred by

as

a

template.

The dimen-

sioned areas should be as accurate as possible to ensure proper timing of hammer disengagement. 2.

Catch-

Drawing

piece shape

of of

The

catch

# 8.

shown

can

be

made

.050 sheet metal the proper width,

the profile to match x .510 roll pin is

by

bending

the drawing. A pressed through

sides of the catch as indicated. a longer pin through and then grind to

ed length.)

a

into a channel and then filing

3/32" both (Press finish-

Dimensioned

as

surfaces

possible

with

the

to

must

ensure

be

proper

as

accurate

engagement

hammer.

Spring-Release Lever- Drawing # 9. his torsion spring is to be made from .030 music wire or an equivalent. It can be easily made with a a 1/8" approximate

in a vise long piece

vise

as

for an of wire

grips.

shown

the

When

in

spring

the and

little practice. Use diameter rod clamped

arbor. Cut about a 3" and clamp both ends with the

drawing bend

the

approximate

is

achieved,

two

Cut spring arms to the as shown on the drawing.

curves

angle

release as

shown.

approximate

Spring-CatchSame as above

5.

Selector Lever- Drawing # 11. The selector lever can be made from .050 thickness steel spring stock, or banding (if available). If neither is available, stock catch

as used for is sufficient.

insert

To as

assemble shown

and

Drawing

the

release

lever

in

the

flare

the

3/16"

(.187)

flatten

the

x

.125

positions with the

assemble in place,

diameter

into

the or

the

chamfer in the lever after the two are in position. Use a piece of steel rod with a 1/8" hole in the center as a punch to flare the knob securely.

steel

lever,

firmly mating

indents in the receiver. To knob, either braze the knob

and

selector

# 13.

diameter x .040 “ball" the selector assembly by

# 10.

Selector Positioning Lug- Drawing # 12. This lug can be made of any available

stock.

Knob-

The selector knob can be made of the same material as the lug in # 7. The knob is knurled to provide a better grip. The .090

length

4,

Drawing in # 3.

Selector

.060

diameter against the lever. The chamfer in the lever will allow the lug to mushroom and be securely fixed in place.

i

Drill

375

‘

Li

|

iF

©

ty |. 275—> — i

le

|

i

|

: 050

4

(.0937)

catch

4s ‘ -h-i—

(es \

.300 pal

1/8"

ole

through

ee catch

{|

Fold tab over

~ Ly

to provide a notch for re-

; !

A ¥t

8

|

395 510

| i

{

lease lever spring.

| \

3/32"

diameter Roll

by .510 Pin

length

DRWG

NO,

|

CATCH

FULL

RELEASE LEVER FULL SCALE | DRWG

NO.

7

(Roll

Pin Location)

} 175

|

wee

3/32"

through

SCALE

8

er 187

a850

a

et SY

\—

Make springs from .030 springs to approximate

40

diameter music wire. shape as shown.

i

— PRING | FULL SCALE

| DRWG. NO. 9

Tt

3g 1875)

Form

|

70

Wa ( 125)

EAL

_~

|

|

Chamfer

surfaces -030

SELECTOR

as

950

| FULL

SCALE

500

735

(2/87) 045

~ | SPRING — CATCH SCALE

|

4

DRWG_NO_/O

x

x

indicated 45°

LEVER

125 —>| Pi;

1

\—140

FULL

050

DRWG. NO}!

SS

oe 300

n=

ime

SELECTOR POSITIONING LUG FULL SCALE DRWG_NO /2

ip

©)

RELEASE LEVER AND CATCH ASSEMBLY

Selector

arn

Whe

Lever

Lever Spring

Catch

Cee

nme

Release

Catch Spring

Pivot Pin-Release Lever

and

3

Catch

Assembly

~