8/2/2019 Western Pistol 1972 (.22 Caliber Single Shot) Plans -
JACO Designs
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~ T E . s " fERN p.IS ro L.,.22 CALIBER SI~CLE S H O T
~ : r- . o" . Entire p-amph.letCopyrighted by JACO Designs
..1972:
,': This pamphlet contains the plans and Lns nr uct Lona neco s
s a ry to construct the Hestertl p i.s-t'ol..stol breaks open to
load and clean and is locked cLos e d w ittl a Lever v t . h at; is
Loc a te d atthc..=. front
trigge-r guard.. Empty- case's are au tcm.at ia L l .y extracted
w h e r i the sun is o p e n e d , The h amme-is a c oil. s pring
and is Jesigned t o pTodDce e xt re ~e ly l ig ht s~ar forc es in
the f u l l CQck p oon. This ar r ang emen t; makes the 'gun .easy
to cock" A s81?arate fLr i.ng pin allows the use of a. sfaced
hammer. There 15 a half cock no.t ch for added s af e ty .The
b-arrel may he made f rom an .oLd rifle barrel or from a r ifLeri
blank cornmcn Ly sold fOT r ep L
ng ~hot-out b4rrels~ These can bE obtained at gun supp ly
house~. Should a r~fled ~lank be choseo'u can grind and fire the
bLank or use a lathe to turn down and tap e.r the bar re l., T~1e
gun should
.f or a beautiful and rugged f LnLsh , JACO o.ffer's a hot
bluing tecnnique that is comp-arable. inpearanc-e and durability to
t.lros e' .on fa c tory made. g uns ,
One sheet of che plans sbows a sec.tj_oned side view, a top
view, and a sectioned pctTtial sidehLch shows tile barrel open and
the hammer co ck.e d , Th-e other sheet shows details ~and patter
ns user construction of the various, parts. These can be tra ce d,
cut and glued .on the steel stock to an cutt~ns out the parts~
Be_fore s tart Lng to cu.t metaI it would be Hise to .read all
the ins tru c tLons .and learn as muchabo~t t he p isto l~ t h i s
desig~ has been r~fined by buil din g and testirig ear lier f f i o
d e l s .
r L c a t e m e chan i.sms 'r e qui.r Ln g c l o s e . fits h a
v e b e e n elitllinatcdwitho_ut s acr Lf Lc i.ng impor:tant f e a
t ryou build the pLst.o I as Lns tr uc-t ed you \vill. have a
compLe re Iy s'~tisfactory weapon. Because T'I'leve, nu con trol.
over the materi.e Ls. you use) the w o rkraaushLp or possible use
o.f the pistol) JACO wt as sume any respons.ib.ilt ty for the
pistol.
Host O .I the stock requi-red is Cold RoLl ed Steel (CRS) and
can be ob.t aLned at any steel supplyOther tnan common tooLs like
.. .s cr ewdr Lver s a.nd files) e tc , ,'the onLy too Is Deeded
are .a
J drill press and bench vi.se , Addit'ional tools such as a
handsaw and a la the ~-rill make theork go easier and .fas t;:er
but are not es s enti a l..You may be tempted to alter .the dea
i.gn to~uit your own preference. like a longer barrel o r as11Bped
h~ndle _ JACO encourages these inncvation~ becaUse. t~ey ad d to
the satisfnctlon
ullding your own pis tol ~ The builder) howe vc r, 'i.p
C3Utioned agn Lns t changing the in te r i.o r
~c_chanthurol1ghstudy sLn ce this desi~n has been pr oven ,
These plans .and Lns tr uc tLons ate not to be copiedin whole'
or in part by anyone v..,ithout wr I tteof JACO.-" ~jATZ1.{r.AL.
All themateti.al for this- pistol is soft cold rolled steel stock
except for_ the Bprimus t b~ music Hire.. You \vil1 need a 1/8 x 5
x 5 inch plate 3!1d a 5./16. x 4 x 6 - inch pla te ~ruc.s, 3/16 d l
a .. x 3 j.uches long, l./B d i.a , x 3 "inches long and 3/32'
dia.. x 3inche$ Lorig . You
.s o no c d SQ~1e musLc r,..:rirp-., d25 diame t.e r about
4:.tnches long and s ome ~045. dtameter\
8/2/2019 Western Pistol 1972 (.22 Caliber Single Shot) Plans -
JACO Designs
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5 - HANMER - Locate, cence r punch rand d'rLl L hole for Hamme r
PIn. (17) with a Its dLa d r L'l.L, LocHcmmer .(10) in its proper
,position on side plate in the part LaI as s crnbLy, The face of
the 'h_a' lTllneshould 'be flat;J_g~l.inst the breech bLock , Clamp
ar.d driLl. through with liB inch drill.. .Pin wfi.h:\ .1/ g.
'1P.el l
s-ide plates '."here. they will cob 1 - -- -- -- -1.
.pn-d-.--,1~----- -,--""n~ h - .a...__. .. .: t ' ~" "- . ~:1 t1.
v.....'-~ 04 1 . . ~ " " ~o " . . . . . L - - _ ; . ~ ~ r"v,7i th
3/1-6 di.a , 'drill i Ha~e Hi
14 - EXTRACJ.'OR ~' L2)' out and fi1e. notch in Ext r a c to r.,
p a r t 9., as .indic.ated.. The w i.d ch of th~ noshould be m
.o-de. to. fit t.he tang' on the. ba r r e L b Lock, The. ex tra.c
to r - shou Ld be- made ro fit the bar
pCT2ec.tly us p os i.bl.e in h e ch n b e r a a., Exces.s
extractor material should be m o v e d so. th.does not cxt end '0
eyond the' br e-ech '. 0 f the bar.r eL except; for~h.e ex trac tor
lug. , Lay out; cen ter pand dr iLl extractor pin hole t.hr ough
with a: 1/-8 die. .. drill ~ Locate extractor on barreI aasernb
LyeLarnp and dr Ll I through tang \"ith 1/8 inch d.ri Ll . Pin with
1/8 dLa ...Ex t ac tor- Pin, par t 21_, 5/1long ...1S - CHAMJ3ERTHE
B~-q_REL - Use .a No" 2 ' drill and dril1\:-he breech end. of the
barrel ~vith ext r ac t.opositioti 0 ..77 Lrrch deep . 0PQrt hoLe
with a No .. 1 dr l l to the same depth .. Drill to a depth of
0inch with a 9/32 dia~ d r i l l .
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JACO Designs
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- FIR1NC PIN .... Mark the center of the bar-rc L on the br
eech. blo-ck. i:'1arki!"Lg is best ac comp.l.La heing red HXagic
~larketH. on the face. to be marked and using a po i.nted brass rod
1/16 inch in dl.amreach through the .barr eL, Tap out breech bLock
pins and remove the breech bLo.ck from the fram
easur e up .fr om the center 3/32 inch, cen ter punch arid drIl
l the firing pI n hole through with a 1riLl . H~~-keFir.ingPin~
part 6,. from 0 - 1/8 .dLa.. rod. as. indicated.- The .point can be
produce d byg the firing. pin in a dr il L pressGnd s.ha-pir~g
ll';!_ th -(1 file.. File tbe v r . e t.:;.i_~j_n.g fLat
asi:1dicated.,s ernbLe ~b'e ~ree ch bl.o ck into the frame.
Loca't.e, ce.nt e r punch arid -0ri 11 r etainin.g pin hole \;J'i
th:ln~d:ril1 , through the as s ambLy , Ass cmb 1'3 t:i r.i ~g pi.n
in pos i~iort arid Lns crt R 'e tairri ng P'Ln, part
Lay o ut and file r o e a r sigh t 1/ Sin ch \ . r : t d.c 1! 16
In ch de.ep ce n te.r edove r the. bore.1 T A " I[ \ . 1 ] 1 ' S 1
n I' " r1"' i r' d 'H . S . , . . 14 ... '}5 ... .,!' 1 f 0 a! 5 ..
..h d ' .. -:-! . 1...J;Ul.l ~ \.. 1\':_'j \..:I - ~~ ~n . . a rune
r .p X " J_ng " part .. , \.lS1ng...... CO.L S o, .. ~ .. + c lnc .
la;. mUS l C VI.lr e .on
rnand+e L 0.1'9.2' inch in. - dia , Select a nat.1 " O f this
approx.Lrna t e d.iarnet.e r arid sLo t one .en d tacks aw ; Hind
the co LLs ti.gh t.Iy tose the r addi:1g 8 few mor e coils to
al101~JEor Sorne sp ring 'back .d Li Lc t:le ends squar e , l
:s.ing .pLi.e r s , s tre tch and then compress t.h.es pring back
to solid heigll
" : .s ul.t~~rtg free length. w.i.Ll, prov i.de 2:PP r oxLraa
teLy the correct s p ring p r eLoad ~,!hen ass embLed, Slipm mer
sp.ring over Hamme r Spring Cu I de , p a rt; IS, .an d ass ernbLe
in to handle as indicated .8 - TRIGGER SP:l:I~G- Trigeer SprLng,
pa.r t 19;. is :nade from .0.025 inch dia" mus.i c wi r'c 3/4 inch
lis as sembLe tr Lg gc.r and d,r.ill a hole in the t~igg'er as
Lndie.ated 1\t.it:h a 1/32 Lnch drill. Ln.se r ti~ger s pring an d
s take "in location by center punching ar.ound the ho l.e . Bend
spring as sb own an
r 11 t .c a i; ,.E.l(~t:c.-r *' -- 1-- F.RONT S-.1CHT - Front
Sight, par t 1, is made f rorn 1/S.inch s tock s h ap ed as Lndi.ca
ted , Dr iI Idi.a .. hoLe. th.rough front sight as shown. Ca.re
fuLl.y.. locate front sigtrt en barrel Ln position
tll~t the sig ht is c ~~ter ed o ver the bore~ :N?~k th e hole l
otation o n th e barrel . Centerd drill llole 1/8 inch deep. Us e
epoxy and assembl~ f~ont sight ~rtd 1/16 i r tc h F ~o n t S~ght
Pin~barreL.- j~'lOODIJ\NDLES - Wood HaridLes, part 29 and. '30~
are, best made . from \Jalnut TNood. HandLes ar e fithe gun and
then sh aped, It is Lmpor tan t that the wood fits the vee notch Ln
the side pLat esLe fo r locating p-in, part j2, us.Lng a 1/16 dia .
drill. Insert a ,,~/l.6 Lnch dia , CRS pin 7/16ng so tllat 1 /1 6.
i nc h ~rotrVdes from each side of the handle~ Mark tocstion of
location pIn' on
byp.ress ing them down car ef u l.Ly, Drill handles 1/16 inch
deep ~T i th 1/16 Lnch drill at mLnsta.l L wood handles using a
No". 7 flat head wood screw,. 1 inch Lorrg modified as
indicatedpart 16. The s crew .shou.Ld be Lns erted from the r Lgh.t
sLde of the .. gun. The right h andLa sh
drt.Ll ed in the indicatea 10cation wi th 5/32 inch drill
through.. Coun terbore hole , , , i th 9/32 incrill to ? depth of
1/8 inch. Insert screw an d tig hte n by s .c r ew in g i nt ~ the
opposit~ ~an~le .. "S hpp handles as indicated to obtain gQAd
fair-in bet~cen wQod .a~d metil ~ar~s of the handl
h.an d.l.e s should b.~:: fLn Ls.lre d y"Tith tT,JO coats of c
Le a rvv arni s h \;Tith a light san.ding b e twe e . . co a t-
STMjE -:- UsLng .l!16
n - as indi.cated .... ..i.ncn s tarnps ,.
,_ FINISH -Finish file the gUh ~;;ith a. ssioo t.h file all over
fLrs l ~~ih .. the gun .assemb Le d to es tpr oper lTblend-inlt of
s ur'f aces., .then dLsas s ernbLe to r each all Lnte.rLor
surfaces. Re!T: i"")ve all- 1a.L sur facc sc r a tch es and scuff
mark.s that ~.Jould rnar r the app ea r'ance of.. foe fi.n i.shed
gun , Lnit ho u L d be cmetnb d h at a g u n traditionally.
hassquc1re. o rnc rs t . h . t c . r e b r clcen slie.l Lrn.i.nte
sbarpncs s . Excessive rouTIp.i;ng of ed'ccs iscotacc~pt,ed gun
practice .~.f~\tiTe br.ush Lngth fil-Lng- TE3~QS a go.od s e rvi
cab le sur face .fOT R blue a gun, in.tended fo r. use. "in th c
fie 1d~
'- TEST FiRE" - Clean t.h e gun -tho ro ugh Ly w i.t.h s oLven t
and oil gun mech anism \,!ith gun o il.. Checkr corr ec t.
operation of latch, ex t.rac tor , h armae r .. firing pin 2::td
trigger. Ch amber e- live r oun.d,
r , s:igh t tarG'e't.anci que e . z e t g . g c r Sf'1C1T.Jld
t.h gL~n !10t fire; the firing pI; i s p r obab l.y DOriking the
CdSI';: ,T,,;j.th suffic.i.ent fc rce , or not in the correct Lcce
ti.ori or with too large a mark ..mp~r.cyour mark "with that made
frorn a f ac t01..~:Y~n.ade gun , thcri P.1~ake 11tera t.o ns and
try aga inuntccessfu1. !I_,....IGHt IN - S;.t up target and _fir,8
a five shot gr oup . , I f the gun sho ot.s
om the right side of the f~ont sight~ If th e gun shoots low,
remove stockh e g u n s hoo t hi0h, r.emove stock .f r o r n th e
top of t.he a.r sight"fr..nt sigh t shou Ld not be less than 1/16
Lnch..
to the Lef t, r.encvef.r o:n the top of t:h.e'n .(.'.. i .h "1-
n e r 1 n 2 .. . _ ,. . _ .rr lCltncs s
- } 1 L U E I N G - T h e g u n s h o u l d b e cLeanc d -o f gr
e a s e by wa shing all steel p ar ts ~7ith laquer thinner.can be
blued w L th any of the comme r cia L cold b Lu Lng products but
these tend to produce a s up e
cOht~ng that is not very durable. JAto has develo ped a hot
bluing solutiO!l that can becompLi.s he d en the ki tche n steve
and p rov i.des as gco d a blue. that is ob t.aLned commerd ea.l.Ly
. Seeoclrur e for ordering, ins truc tLons ,.----'OX - SeLec t. a
good piece of lJh.ite P'Lne .1 x 6 x 22 inches long. Cut board in
half to form b
-D-ra\1 outline. of gun en '~he box and, the: opposLt.e out
Ld.ne on the lid. Remove wood by chiseling. . . .... ..
