Smallest .177 Air (4.5mm) pistols

Rank	Firearm	Overall length	Weight	Year
=1st	e|8y)&*ez^;<^{*?<}0;|5$a^fz[0,4?*8a!/e]x6[|;!4a3Walther CP99Walther CP99Umarex GmbH & Co. KGUmarex GmbH & Co. KG	180 mm (7.09 in)	740 g	1999
=1st	,$^0~-=~y2.3]63\0\52&[>*+0:0b\6327=e%(~):&?c=[b$Walther CP88Walther CP88Umarex GmbH & Co. KGUmarex GmbH & Co. KG	180 mm (7.09 in)	1.03 kg	1996
3rd	]x<#(}b~%z&~e:$41e;+=>5}b||>@d}(#.0[~y);_)c{*~.=Webley TempestWebley TempestWebley & Scott LtdWebley & Scott Ltd	226 mm (8.90 in)	953 g	1977
4th	{\&/ab;b|[<c8:50y//f%4{2_>[8=*({3e)=c/c|.}4#5-:/Weihrauch HW40Weihrauch HW40Hermann Weihrauch Sportwaffen GmbH & Co. KGHermann Weihrauch Sportwaffen GmbH & Co. KG	240 mm (9.45 in)	780 g
5th	9z4=#!!0;>+02{!=!8x?9dd;$7!.$+2_0f&3c70^\6|$8~-,Weihrauch HW45Weihrauch HW45Hermann Weihrauch Sportwaffen GmbH & Co. KGHermann Weihrauch Sportwaffen GmbH & Co. KG	272 mm (10.71 in)	1.15 kg	1979
=6th	)>;=]^4#/)@_3e[|+:{!0)+z-5f5]|71}_&9+7[3\~x<2xb\Röhm TwinmasterRöhm TwinmasterRöhm GesellschaftRöhm Gesellschaft	279 mm (10.98 in)	1.09 kg	2005
=6th	}_0ey+z<%f*y9e7f4+\x/!479+z93={<{e0<f,=d,<;>_8x(Beeman P1Beeman P1Hermann Weihrauch Sport GmbH & Co. KGHermann Weihrauch Sport GmbH & Co. KG	279 mm (10.98 in)	1.13 kg	1985
8th	)/~x2;,=xa#a_^/<3%!d0}<;@!&(?f%c9-7<?d=4[&-$8)c.Weihrauch HW75Weihrauch HW75Hermann Weihrauch Sport GmbH & Co. KGHermann Weihrauch Sport GmbH & Co. KG	280 mm (11.02 in)	1.06 kg	1984
9th	x2/x7&[y)*6!%+|^(4/#&_}\17-/=*c*c^e_52;~05!3(y0(FAS 604FAS 604Fabbrica Armi SportiveFabbrica Armi Sportive	290 mm (11.42 in)	900 g	1981
10th	<cy754;z74ab{8>@0;9?29,c~+(;/-/0e1%_d^1:0~;[>@{1Gamo CompactGamo CompactIndustrias El Gamo S.A.Industrias El Gamo S.A.	320 mm (12.6 in)	880 g	1996
11th	0>1||\+9|@*x&@({c9)7^(/^b>1a0e[3y\=,b1/9c53){_)xWalther LP53Walther LP53Carl Walther GmbHCarl Walther GmbH	330 mm (13.0 in)	1.15 kg	1953
12th	d~3~$}0e|b2\>#z}dy>.9:[.#0@e8~c;0|_)-d1#,9603a+bDaisy 717Daisy 717Daisy Outdoor ProductsDaisy Outdoor Products	343 mm (13.5 in)	1.02 kg	1979
13th	x8]]3#,z<8>5b(;,+%4$x@|?(:2(cdb82/}}~])]0+9~9@(@Pardini KIDPardini KIDPardini Armi S.r.l.Pardini Armi S.r.l.	350 mm (13.8 in)	700 g
14th	^b>0^(ex0(<?{!a[\x)16+e3>!d~.0/1)+f1_a,_~d%%x8).Crosman 1701P SilhouetteCrosman 1701P SilhouetteCrosman CorporationCrosman Corporation	375 mm (14.8 in)	1.13 kg	2010
=15th	.&4x<.#*a-]y!}=)~<x**>d!90^~z3404a}+yx>b2x6\^f\-Pardini K12 JuniorPardini K12 JuniorPardini Armi S.r.l.Pardini Armi S.r.l.	380 mm (15.0 in)	910 g
=15th	/330+:b0a}e>^b$_)+^+:x=0):b6d/]#@]\7*^$?$8&!0y30Pardini K2SPardini K2SPardini Armi S.r.l.Pardini Armi S.r.l.	380 mm (15.0 in)	910 g	1998
17th	1.{!b/;/9:<a{#)b3)##9|>8%:/x\\((c5a*<>\#[c#@!7e3Steyr LP2Steyr LP2Steyr Sportwaffen GmbHSteyr Sportwaffen GmbH	390 mm (15.4 in)	905 g	2017
18th	ez]a|yxc<|]\,>9d?.&cz65}2*x+!#6z@_+1>@@a?!00z(8bSteyr LP 50Steyr LP 50Steyr Sport GmbHSteyr Sport GmbH	398 mm (15.7 in)	1.05 kg
=19th	/&dz|-->40!3:z:&#/%.$}@y))21<{3(*.22<]/-b:1%=4f8Walther LP200Walther LP200Carl Walther GmbH SportwaffenCarl Walther GmbH Sportwaffen	400 mm (15.7 in)	940 g	1998
=19th	e>8z\\3a5y**2#<xxa;3_~:0?_;1_8ez\$,3:0!e_{1z3>1+Steyr Evo10Steyr Evo10Steyr Sport GmbHSteyr Sport GmbH	400 mm (15.7 in)	968 g	2012
=19th	@{c:ec:2$.>|z59+z6[*9#<~*{(|e,8#_\x#47$c~.{e(09,Steyr Evo 10Steyr Evo 10Steyr Sportwaffen GmbHSteyr Sportwaffen GmbH	400 mm (15.7 in)	968 g	2016
=19th	2|d}]4y2~f4cfx}&.+@@]_~!$/.<*0|/~6/({-=01e$%!d1,Steyr Evo10ESteyr Evo10ESteyr Sportwaffen GmbHSteyr Sportwaffen GmbH	400 mm (15.7 in)	968 g	2016
=19th	@0z_$#+5d$}891*99}#$[a5zb)_4<._(_cc05c9=d&2x8a9}Steyr LP EVO 10Steyr LP EVO 10Steyr Sport GmbHSteyr Sport GmbH	400 mm (15.7 in)	968 g	2016
=19th	\?<~f>||f;a]/|@)^#:%1{(28d:+$30e59=#=a9^-6.a;:(~Steyr LP10Steyr LP10Steyr Sportwaffen GmbHSteyr Sportwaffen GmbH	400 mm (15.7 in)	968 g	2000
=19th	,(?&>~\a>~>@|-)::d}^01&.(?3~3~7x^9[>__x?cd34x)b9Morini CM 200EIMorini CM 200EIMorini Competition Arm SAMorini Competition Arm SA	400 mm (15.7 in)	985 g

Ranked from the catalogue's own measured figures, the same records the API serves. A record whose weight, length, barrel and capacity match a set shared by ten or more records from five or more makers is a default rather than a measurement, and is left out, as is a record with fewer than five of the figures a reader looks for.