Lightest 5.56x45mm NATO rifles

Rank	Firearm	Empty weight	Year
1st	2A Armament Balios Lite BLR-162A Armament Balios Lite BLR-162A Armament2A Armament	2.27 kg (5.00 lb)	2014
=2nd	,$^0~-=~y2.3]63\0\52&[>*+0:0b\6327=e%(~):&?c=[b$Faxon ARAK-21Faxon ARAK-21Faxon FirearmsFaxon Firearms	2.50 kg (5.50 lb)	2014
=2nd	]x<#(}b~%z&~e:$41e;+=>5}b||>@d}(#.0[~y);_)c{*~.=Spike's Tactical CompressorSpike's Tactical CompressorSpike's TacticalSpike's Tactical	2.50 kg (5.50 lb)	2014
4th	{\&/ab;b|[<c8:50y//f%4{2_>[8=*({3e)=c/c|.}4#5-:/Grand Power R15 FreyaGrand Power R15 FreyaGrand PowerGrand Power	2.61 kg (5.75 lb)	2022
5th	9z4=#!!0;>+02{!=!8x?9dd;$7!.$+2_0f&3c70^\6|$8~-,FightLite SCRFightLite SCRFightLite IndustriesFightLite Industries	2.68 kg (5.91 lb)	2014
6th	)>;=]^4#/)@_3e[|+:{!0)+z-5f5]|71}_&9+7[3\~x<2xb\Spike's Tactical WahineSpike's Tactical WahineSpike's TacticalSpike's Tactical	2.72 kg (6.00 lb)	2019
=7th	}_0ey+z<%f*y9e7f4+\x/!479+z93={<{e0<f,=d,<;>_8x(Spike's Tactical CrusaderSpike's Tactical CrusaderSpike's TacticalSpike's Tactical	2.78 kg (6.12 lb)	2021
=7th	)/~x2;,=xa#a_^/<3%!d0}<;@!&(?f%c9-7<?d=4[&-$8)c.Spike's Tactical 5.56 M4 LE 16"Spike's Tactical 5.56 M4 LE 16"Spike's TacticalSpike's Tactical	2.78 kg (6.12 lb)	2010
9th	x2/x7&[y)*6!%+|^(4/#&_}\17-/=*c*c^e_52;~05!3(y0(Spike's Tactical Black Assassin V2Spike's Tactical Black Assassin V2Spike's TacticalSpike's Tactical	2.81 kg (6.19 lb)	2018
10th	<cy754;z74ab{8>@0;9?29,c~+(;/-/0e1%_d^1:0~;[>@{1Shadow Systems U526Shadow Systems U526Shadow SystemsShadow Systems	2.81 kg (6.20 lb)	2026
11th	0>1||\+9|@*x&@({c9)7^(/^b>1a0e[3y\=,b1/9c53){_)xSpike's Tactical 5.56 Midlength CHF 16"Spike's Tactical 5.56 Midlength CHF 16"Spike's TacticalSpike's Tactical	2.83 kg (6.25 lb)	2015
12th	d~3~$}0e|b2\>#z}dy>.9:[.#0@e8~c;0|_)-d1#,9603a+bStag Arms STAG-15Stag Arms STAG-15Stag ArmsStag Arms	2.86 kg (6.30 lb)	2003
13th	x8]]3#,z<8>5b(;,+%4$x@|?(:2(cdb82/}}~])]0+9~9@(@AR-15AR-15Colt's Manufacturing CompanyColt's Manufacturing Company	2.89 kg (6.37 lb)	1963
=14th	^b>0^(ex0(<?{!a[\x)16+e3>!d~.0/1)+f1_a,_~d%%x8).Maxim Defense MD:15LMaxim Defense MD:15LMaxim Defense IndustriesMaxim Defense Industries	2.89 kg (6.38 lb)	2022
=14th	.&4x<.#*a-]y!}=)~<x**>d!90^~z3404a}+yx>b2x6\^f\-Spike's Tactical Pipe Hitters Union RifleSpike's Tactical Pipe Hitters Union RifleSpike's TacticalSpike's Tactical	2.89 kg (6.38 lb)	2018
=14th	/330+:b0a}e>^b$_)+^+:x=0):b6d/]#@]\7*^$?$8&!0y30Spike's Tactical Ultimate Assassin V2Spike's Tactical Ultimate Assassin V2Spike's TacticalSpike's Tactical	2.89 kg (6.38 lb)	2018
17th	1.{!b/;/9:<a{#)b3)##9|>8%:/x\\((c5a*<>\#[c#@!7e3Daniel Defense M4A1 RIIIDaniel Defense M4A1 RIIIDaniel DefenseDaniel Defense	2.90 kg (6.39 lb)	2024
=18th	ez]a|yxc<|]\,>9d?.&cz65}2*x+!#6z@_+1>@@a?!00z(8bRuger Mini-14 GBRuger Mini-14 GBSturm, Ruger & CompanySturm, Ruger & Company	2.90 kg (6.39 lb)	1976
=18th	/&dz|-->40!3:z:&#/%.$}@y))21<{3(*.22<]/-b:1%=4f8Polymer80 G150 (RL556)Polymer80 G150 (RL556)Polymer80, Inc.Polymer80, Inc.	2.90 kg (6.39 lb)	2013
=20th	e>8z\\3a5y**2#<xxa;3_~:0?_;1_8ez\$,3:0!e_{1z3>1+Bond Arms LVRBBond Arms LVRBBond ArmsBond Arms	2.90 kg (6.40 lb)	2026
=20th	@{c:ec:2$.>|z59+z6[*9#<~*{(|e,8#_\x#47$c~.{e(09,Bushmaster Bravo ZuluBushmaster Bravo ZuluBushmaster Firearms InternationalBushmaster Firearms International	2.90 kg (6.40 lb)	2022
=20th	2|d}]4y2~f4cfx}&.+@@]_~!$/.<*0|/~6/({-=01e$%!d1,CAR 814 A2CAR 814 A2Caracal International LLCCaracal International LLC	2.90 kg (6.40 lb)	2019
=20th	@0z_$#+5d$}891*99}#$[a5zb)_4<._(_cc05c9=d&2x8a9}POF-USA Renegade PlusPOF-USA Renegade PlusPatriot Ordnance FactoryPatriot Ordnance Factory	2.90 kg (6.40 lb)	2019
24th	\?<~f>||f;a]/|@)^#:%1{(28d:+$30e59=#=a9^-6.a;:(~Maxim Defense MD:15 DutyMaxim Defense MD:15 DutyMaxim Defense IndustriesMaxim Defense Industries	2.92 kg (6.44 lb)	2024
25th	,(?&>~\a>~>@|-)::d}^01&.(?3~3~7x^9[>__x?cd34x)b9Ruger American Rifle Generation II PatrolRuger American Rifle Generation II PatrolSturm, Ruger & Co.Sturm, Ruger & Co.	2.95 kg (6.50 lb)	2026

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.