AR-15 5.56/.223 Gas Port Size (Responses)
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What brand is the barrel?If this brand has multiple barrel lines, what line is this barrel from?What is the approximate barrel length in inches?What is the gas system?What size is the gas port in inches?What was the source of information?What date was this information sourced?If the information came from a third party, who was this third party?
2
Aero Precision10.5Carbine0.079Manufacturer6/27/2016
3
Aero Precision10.5Carbine0.0785Manufacturer7/6/2019
4
Aero Precision16Midlength0.079Manufacturer6/27/2016
5
Andro Corp Industries
10.3 with FSB, Ballistic Advantage
10.5Carbine0.070Manufacturer7/1/2017
6
AR-StonerCMV nitride10.5Carbine0.070Self-measured7/20/2017
7
Ballistic AdvantageHanson 10.310.5Carbine0.078Self-measured4/12/2016
8
Ballistic AdvantageModern Series10.5Carbine0.079Manufacturer10/1/2016
9
Ballistic AdvantageMk1810.5Carbine0.0785Manufacturer1/10/2018
10
Ballistic AdvantageModern Series14.5Midlength0.079Self-measured
11
Ballistic Advantage Hanson 14.5Midlength0.0785Manufacturer3/14/2018
12
Ballistic Advantage Hanson 16Midlength0.0785Manufacturer3/14/2018
13
Ballistic AdvantageHanson16Midlength0.073Manufacturer7/15/2018
14
Ballistic AdvantageHanson, .625 GB16Midlength0.073Manufacturer7/15/2018
15
Ballistic AdvantageModern Series, .750 GB16Midlength0.069Self-measured1/10/2016
16
Ballistic AdvantageModern Series16Midlength0.078Self-measured7/12/2018
17
Black River TacticalSS Optimum16Intermediate0.081Self-measured11/20/2018
18
Bravo Company Manufacturing11.5Carbine0.076Self-measured7/1/2009
19
Bravo Company Manufacturing11.5Carbine0.073Self-measured3/13/2017
20
Bravo Company ManufacturingCHF11.5Carbine0.075Manufacturer1/1/2017
21
Bravo Company Manufacturing Standard ELW11.5Carbine0.073Self-measured9/18/2018
22
Bravo Company Manufacturing14.5Midlength0.076Self-measured6/28/2016
23
Bravo Company Manufacturing16Midlength0.076Self-measured6/28/2016
24
Bravo Company ManufacturingStandard gov't profile16Midlength0.076Self-measured
25
Bravo Company ManufacturingGov't profile20Rifle0.093Self-measured8/13/2017
26
Bravo Company Manufacturing20Rifle0.092Self-measured1/10/2018
27
Bushmaster16Carbine0.0625-0.0650Manufacturer6/27/2016
28
BushmasterXM-15 MOE (Qty. of 4)16Carbine0.058Third party1/8/2013
Lucky Gunner (http://www.luckygunner.com/labs/brass-vs-steel-cased-ammo/)
29
Bushmaster16Midlength0.078-0.081Manufacturer6/27/2016
30
BushmasterHBAR20Rifle0.093Self-measured
31
CBC Industries10.5Carbine0.078125Self-measured11/8/2017
32
Centurion Arms10.5Carbine0.070Self-measured7/19/2019
33
Centurion Arms11.5Carbine0.073Self-measured3/13/2017
34
Centurion Arms12.5Carbine0.064Manufacturer
35
Centurion ArmsCHF, .750 @ gas block12.5Carbine0.064Self-measured11/21/2018Measured with pin gauge
36
Centurion ArmsCHF 14.7" Carbine14.5Carbine0.069Manufacturer7/17/2017
37
Centurion Arms16Midlength0.080Self-measured11/12/2013
38
ColtColt Commando11.5Carbine0.069Self-measured10/20/2017
39
Colt693311.5Carbine0.074Self-measured11/12/2018Used a pin gauge.
40
ColtLE693311.5Carbine0.074Self-measured4/22/2019
41
ColtM414.5Carbine0.062-0.063Manufacturer8/13/2004
42
ColtSOCOM14.5Carbine0.062Self-measured10/1/2016
43
ColtSOCOM14.5Carbine0.062Self-measured3/1/2016
44
ColtColt 694414.5Carbine0.062Third party4/23/2018AR15.com
45
Colt692016Carbine0.062Self-measured1/1/2015
46
Colt6920 SOCOM16Carbine0.062Self-measured1/1/2014
47
ColtHBAR20Rifle0.092Self-measured12/31/2017
48
ColtM16A120Rifle0.092-0.093Manufacturer9/28/1988
49
Criterion
CLE Recon 16.1 Ops Inc. Profile
16Midlength0.076Self-measured7/8/2018
50
CriterionHybrid 1:8 Chrome Lined20Rifle0.092Self-measured3/1/2018Pin gauge measured
51
Daniel DefenseMK18 Complete Upper10.5Carbine0.082Manufacturer
52
Daniel DefenseCHF10.5Carbine0.081Self-measured
53
Daniel DefenseMK1810.5Carbine0.076Self-measured6/6/2010
54
Daniel Defense10.5Carbine0.072Manufacturer6/1/2017
55
Daniel DefenseMK1810.5Carbine0.070Manufacturer6/15/2017
56
Daniel DefenseFactory MK1810.5Carbine0.080Self-measured10/10/2017
57
Daniel Defense11.5Carbine0.076Manufacturer6/27/2016
58
Daniel Defense12.5Carbine0.0595Third party5/28/2018Brownells
59
Daniel DefenseGovernment Profile12.5Carbine0.073Manufacturer5/1/2018
60
Daniel DefenseCHF 14.5Carbine0.067Manufacturer7/18/2017
61
Daniel DefenseM4 Gov't profile14.5Carbine0.067Self-measured1/12/2017
62
Daniel Defense14.5Carbine0.063Manufacturer
63
Daniel Defense14.5Carbine0.066Self-measured8/13/2017
64
Daniel Defense14.5Midlength0.076Manufacturer
65
Daniel DefenseLightweight CHF14.5Midlength0.076Manufacturer8/13/2017
66
Daniel Defense16Carbine0.060Manufacturer
67
Daniel DefenseS2W16Midlength0.072Self-measured8/1/2017
68
Daniel DefenseLightweight CHF16Midlength0.072Self-measured8/31/2011
69
Daniel DefenseHodge AU Mod 116Midlength0.072Self-measured10/15/2018
70
Daniel Defense16Midlength0.073Manufacturer6/27/2016
71
DS ArmsHeavy Stainless16Midlength0.087Self-measured1/9/2019
72
Fabrique Nationale HerstalCHF14.5Midlength0.077Self-measured10/9/2018
73
Faxon Firearms
10.5" Gov't / Socom, 5.56 NATO, Carbine-Length, 4150 QPQ
10.5Carbine0.081Self-measured7/5/2018
74
Faxon Gunner10.5Pistol0.104Manufacturer7/15/2019
75
Faxon
14.5" Pencil w/ Slim 3 Prong Flash Hider (16” overall), 5.56 NATO, 4150, Nitride SKU: 15A58M14NPQ-PFH3
14.5Midlength0.081Manufacturer5/13/2019
76
Faxon FirearmsFlame 5.56mm16Midlength0.081Manufacturer11/25/2016
77
Faxon FireamrsSOCOM/Govt16Midlength0.076Self-measured1/24/2018
78
Faxon FirearmsSOCOM/Govt16Midlength0.081Manufacturer4/2/2018
https://www.joeboboutfitters.com/Faxon-Firearms-16-Gov-t-Socom-5-56-Mid-Length-415-p/fax-15a58m16nsq.htm
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Faxon FirearmsGunner16Midlength0.075Self-measured1/24/2018
80
Faxon FirearmsGUNNER18Rifle0.080Self-measured
81
Franklin Armory20Rifle0.123Self-measured5/11/2019
82
Green Mountain Rifle Barrel Co.
14.7" 5.56 NATO Pencil Profile
14.5Carbine0.071Manufacturer
83
Green Mountain Rifle Barrel Co.GM-M816Midlength0.081Manufacturer12/19/2018
84
Griffin ArmamentHEDP11.5Carbine0.084Self-measured8/15/2016
85
Hardened ArmsUNK10.5Carbine0.086Self-measured
86
Hardened Arms16Carbine0.088Manufacturer6/28/2016
87
Hodge Defense Systems12.5Carbine0.068Manufacturer3/13/2017
88
Hodge Defense Systems14.5Midlength0.075Self-measured10/9/2018
89
Invincible Arms16Carbine0.073Manufacturer6/30/2016
90
Invincible Arms18Midlength0.081-0.089Manufacturer6/30/2016
91
Knight's Armament KAC SR15 MOD 016Intermediate0.078Self-measured12/20/2016
92
Knight's ArmamentKAC SR15 MOD 116Intermediate0.078Self-measured3/13/2013
93
Knight's ArmamentSR-15 Match18Rifle0.081Self-measured3/13/2018
94
LaRue TacticalStealth12Carbine0.076Self-measured1/28/2018
95
LaRue TacticalStealth16Midlength0.078Self-measured2/3/2018
96
Lewis Machine and Tool10.5Carbine0.073Manufacturer6/28/2016
97
Lewis Machine and Tool10.5Carbine0.073Self-measured5/9/2017
98
Lewis Machine and Tool16Carbine0.062Manufacturer6/28/2016
99
Midwest Industries16Midlength0.081Manufacturer6/27/2016
100
NoveskeSwitchblock S setting10.5Carbine0.063Self-measured8/13/2017
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