User Panel
User Panel
User Panel
|
Posted: 3/3/2019 12:17:14 PM EDT
[#1]
Do the math:
Measure flash hider length then add that to 14.5, then subtract that from 16, equals the length you need Or go simple order one of these: Windam extended A2 |
|
|
|
Posted: 3/3/2019 12:19:07 PM EDT
[#2]
Quote HistoryQuoted:
Do the math: Measure flash hider length then add that to 14.5, then subtract that from 16, equals the length you need Or go simple order one of these: Windam extended A |
|
|
|
Posted: 3/3/2019 12:22:23 PM EDT
[#3]
Quote HistoryQuoted:
No don't do this it is wrong. |
|
|
|
Posted: 3/3/2019 12:24:02 PM EDT
[#4]
Quote HistoryQuoted:
Do the math: Measure flash hider length then add that to 14.5, then subtract that from 16, equals the length you need Or go simple order one of these: Windam extended A2 kwg |
|
|
|
Posted: 3/3/2019 12:24:17 PM EDT
[#5]
Quote HistoryQuoted:
How so? |
|
|
|
Posted: 3/3/2019 12:24:50 PM EDT
[#6]
Make sure you know, BATFE has specific definitions of what attachment method is and is not acceptable to make the legal length and welcome to the site.
If you pay to have it done, look into ADCO for the work. |
|
|
|
Posted: 3/3/2019 12:26:41 PM EDT
[#7]
Just put on a pistol lower
|
|
|
|
Posted: 3/3/2019 12:30:53 PM EDT
[#8]
Quote HistoryQuoted:
The flash hider and the barrel don't butt up end to end, they overlap. Generally by a half inch. "This version of the A2 Bird Cage Flash Hider makes a 14.5” barrel a legal length of 16” when pinned and welded /Overall length is 2 ¼" " Eta: 14.5" with std A2/crushwasher using a .250" spacer will put you at 16.125" OAL. |
|
|
|
Posted: 3/3/2019 12:32:20 PM EDT
[#9]
Quote HistoryQuoted:
It is an extended hider, specifically for P/W of 14.5" barrels... "This version of the A2 Bird Cage Flash Hider makes a 14.5" barrel a legal length of 16" when pinned and welded /Overall length is 2 " " |
|
|
|
Posted: 3/3/2019 12:33:51 PM EDT
[#10]
Quote HistoryQuoted:
The math is wrong, not the extended flash hider. 
|
|
|
|
Posted: 3/3/2019 1:00:51 PM EDT
[#11]
I just used the bravo a2x, not a fan of math.
|
|
|
|
Posted: 3/3/2019 1:09:12 PM EDT
[#12]
If it’s a M4 barrel, consider a spacer instead of an extended A2. Looks better IMO.
This is one John Thomas did. 
|
|
|
|
Posted: 3/3/2019 1:09:18 PM EDT
[#13]
Quote HistoryQuoted:
The flash hider and the barrel don't butt up end to end, they overlap. Generally by a half inch. That is what I should have said. |
|
|
|
Posted: 3/3/2019 1:14:24 PM EDT
[#14]
Quote HistoryQuoted: overlap? |
|
|
|
Posted: 3/3/2019 1:17:51 PM EDT
[#15]
Quote HistoryQuoted:
overlap? Yes of course the threaded portion of barrel wont count, so why not just screw on a A2 with no washer then measure the length That is what I should have said. Quote HistoryQuoted:
Quoted:
The flash hider and the barrel don't butt up end to end, they overlap. Generally by a half inch. That is what I should have said. |
|
|
|
Posted: 3/3/2019 1:29:18 PM EDT
[#16]
2" or more for no worries.
|
|
|
|
Posted: 3/3/2019 1:35:02 PM EDT
[#17]
Quote HistoryQuoted:
If it’s a M4 barrel, consider a spacer instead of an extended A2. Looks better IMO. This is one John Thomas did. https://i.imgur.com/dVvLA9q.jpg |
|
|
|
Posted: 3/3/2019 2:03:25 PM EDT
[#18]
The barrel measurement starts at the bolt face. On an AR, the front of the receiver is almost exactly lined up with the bolt face, as a reference only.
To get an 'exact measurement' you will need to use a dowel rod or cleaning rod ran down the barrel till it stops against the bolt face, the opposite muzzle end of the dowel will give you the true barrel length. The bolt face to the end of the barrel or permanent device is what needs to reach 16''. Trusting the barrels listed length, minus threads / plus washer and muzzle device is risky. I would get an exact measurement and make sure you're at 16'' before pinning and welding anything . A true 14.5'' barrel with a crush washer and A2 will be a little short of 16''. |
|
|
|
Posted: 3/3/2019 2:09:36 PM EDT
[#19]
Quote HistoryQuoted:
The barrel measurement starts at the bolt face. On an AR, the front of the receiver is almost exactly lined up with the bolt face, as a reference only. To get an 'exact measurement' you will need to use a dowel rod or cleaning rod ran down the barrel till it stops against the bolt face, the opposite muzzle end of the dowel will give you the true barrel length. The bolt face to the end of the barrel or permanent device is what needs to reach 16''. Trusting the barrels listed length, minus threads / plus washer and muzzle device is risky. I would get an exact measurement and make sure you're at 16'' before pinning and welding anything . A true 14.5'' barrel with a crush washer and A2 will be a little short of 16''. |
|
|
|
Posted: 3/3/2019 2:25:58 PM EDT
[#20]
So I just measured the barrel doing the exact method and I swear to god my barrel length is coming longer than 14.5. It’s actually coming out to 14.75. How is that possible? I ordered a upper from Bravo Company which said 14.5. Am I doing it right? I’ve checked it over 10 times and I keep getting 14.75 barrel length
|
|
|
|
Posted: 3/3/2019 2:28:07 PM EDT
[#21]
Quoted:
I'm trying to extend my 14.5 inch barrel to be 16". What is the EXACT length of the barrel (NOT estimate) with an A2 flash hider and would putting a Jam nut behind the flash hider make the length 16"+ inches? IMOHO - you don't want an EXACT number, unless you have access to one of the ATF's "official 16 inch barrel rods"... You want "plus a comfortable margin", about 1/8 inch. Generally, if your muzzle device is 2-1/4 inches long, you should be good with a standard 1/10" thick lock-washer or crush washer. But remember, not all barrels have the threaded portion the same exact length. |
|
|
|
Posted: 3/3/2019 2:32:33 PM EDT
[#22]
Quote HistoryQuoted:
So I just measured the barrel doing the exact method and I swear to god my barrel length is coming longer than 14.5. It’s actually coming out to 14.75. How is that possible? I ordered a upper from Bravo Company which said 14.5. Am I doing it right? I’ve checked it over 10 times and I keep getting 14.75 barrel length |
|
|
|
Posted: 3/3/2019 2:44:25 PM EDT
[#23]
Quote HistoryQuoted:
A couple weeks ago on here someone said something similar and BCM basically told them their barrel lengths were just rough estimates. 
|
|
|
|
Posted: 3/3/2019 5:36:05 PM EDT
[#24]
Well, then maybe I’m not going crazy after all and it is longer than 14.5
|
|
|
|
Posted: 3/3/2019 5:55:51 PM EDT
[#25]
Quote HistoryQuoted:
If it’s a M4 barrel, consider a spacer instead of an extended A2. Looks better IMO. This is one John Thomas did. https://i.imgur.com/dVvLA9q.jpg John does it correctly,......send it to him |
|
|
|
Posted: 3/3/2019 5:56:37 PM EDT
[#26]
Quote HistoryQuoted:
Quote HistoryQuoted:
Quoted:
A couple weeks ago on here someone said something similar and BCM basically told them their barrel lengths were just rough estimates. |
|
|
|
Posted: 3/3/2019 6:30:34 PM EDT
[#27]
Quote HistoryQuoted: Much better job than pics ive seen from a shop that uses crush washers and shims. John does it correctly,......send it to him Unless you can do it yourself.
|
|
|
|
Posted: 3/3/2019 6:33:25 PM EDT
[#28]
Quote HistoryQuoted:
Quote HistoryQuoted:
Quoted:
A couple weeks ago on here someone said something similar and BCM basically told them their barrel lengths were just rough estimates. |
|
|
|
Posted: 3/3/2019 10:49:23 PM EDT
[#29]
Quote HistoryQuoted:
If it’s a M4 barrel, consider a spacer instead of an extended A2. Looks better IMO. This is one John Thomas did. https://i.imgur.com/dVvLA9q.jpg |
|
|
|
Posted: 3/3/2019 11:26:41 PM EDT
[#30]
Quote HistoryQuoted: Much better job than pics ive seen from a shop that uses crush washers and shims. John does it correctly,......send it to him |
|
|
|
Posted: 3/4/2019 1:18:43 AM EDT
[#31]
|
|
|
|
Posted: 3/4/2019 8:00:14 AM EDT
[#32]
14.5 " barrels like any length will vary in size. Mock your barrel up with the FH you want and measure to see exactly what you need.
Me, on my 14.5 I used an extended A2 from the AR15 store on this site. Gives me 16.1 OAL. |
|
|
|
Posted: 3/4/2019 12:18:58 PM EDT
[#33]
|
|
|
|
Posted: 3/4/2019 12:58:55 PM EDT
[#34]
Quote HistoryQuoted:
Easy solution. I like to thread the hole with #4x40 TPI set screw but to each their own. kwg I’ve also went with high temperature (1100 degrees +) Silver Solder. |
|
|
|
Posted: 3/4/2019 2:12:17 PM EDT
[#35]
Quote HistoryQuoted:
So I just measured the barrel doing the exact method and I swear to god my barrel length is coming longer than 14.5. It’s actually coming out to 14.75. How is that possible? I ordered a upper from Bravo Company which said 14.5. Am I doing it right? I’ve checked it over 10 times and I keep getting 14.75 barrel length If you measure an Army 14.5 barrel the ATF way, you get somewhere around 14-5/8. Civilian "14.5" barrels are usually 1/8 inch longer so a 2-1/4 muzzle device gives a comfortable margin over 16 inches. And some people just advertise their barrels as they are - 14.7 |
|
|
|
Posted: 3/5/2019 4:30:29 PM EDT
[#36]
Topic Moved
|
|
|
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
Attached File
Attached File