BumpSAW/Bump IAR Picture Video and theoretical discussion thread. - Page 19

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[ARCHIVED THREAD] - BumpSAW/Bump IAR Picture Video and theoretical discussion thread. (Page 19 of 21)

Posted: 9/4/2017 5:42:36 PM EDT

[#1]

Well, I've got two more barrels and nitrided gas tubes inbound.

I went with Spikes gas tubes as they're 20% off and free shipping at AIM surplus. LABORDAY17 is the code.

Posted: 9/4/2017 8:40:16 PM EDT

[#2]

I like bipods.

Posted: 9/4/2017 8:57:32 PM EDT

[#3]

Looks good, but I'm kind of a purist. I personally wouldn't have used an M203 handguard without the launcher.

Posted: 9/5/2017 4:24:06 AM EDT

[#4]

Don't know how long this is going to last, but Anderson has their M4 16" non-chrome lined barrels for $45, free shipping over $99 with code customer20.

$45 16" M4 parkerized barrel

Posted: 9/5/2017 11:38:06 AM EDT

[#5]

This is the first time I looked at this thread. While I can appreciate everyone's wanting to try full auto, I do not know how you can afford to shoot a bump fire frequently. I guess my experience shooting 3 rd burst and full auto proved to me I am wasting rounds since after 2 they normally miss. But it is your money and your fun and it does look like fun. I had to vote, "no they are stupid", but mine should have read; No they are not practical. I am a cheap bastard.

Posted: 9/5/2017 11:40:31 AM EDT

[#6]

Quote History

Quoted:
I put mine together, but haven't tested it yet. What do you think?
https://www.AR15.Com/media/mediaFiles/298/IMG_1639-299286.JPG

https://www.AR15.Com/media/mediaFiles/298/IMG_1640-299287.JPG

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Looks fun to me! Build details?

Posted: 9/5/2017 11:41:15 AM EDT

[#7]

Quote History

Quoted:
This is the first time I looked at this thread. While I can appreciate everyone's wanting to try full auto, I do not know how you can afford to shoot a bump fire frequently. I guess my experience shooting 3 rd burst and full auto proved to me I am wasting rounds since after 2 they normally miss. But it is your money and your fun and it does look like fun. I had to vote, "no they are stupid", but mine should have read; No they are not practical. I am a cheap bastard.

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Well, it does get spendy quick. I like to show up with $300-$500 in ammunition loaded

Posted: 9/6/2017 5:52:35 AM EDT

[#8]

Quote History

Quoted: I was about to say "no 20", no care" but then I saw the price, that's pretty good.

I think that stainless Bear Creek 20" with fluting (on sale but OOS) is what I'm using now on the BumpLewis. I'm probably going to buy the 20" regular barrel as a spare for $74. I was looking for a 20" FN with the machinegun chrome, but PSA doesn't seem to sell it separately, ant it's at least $300 in an assembled upper. So I think I can probably expect 3x cheap barrels will last as long as one nice one.

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Bump Lewis. Hmm. Any reason someone couldn't make an underslung flat drum mag for the AR? Add a Picatinny/M-Dick attachment to the rail to lock the forward part into, and maybe a pivoting Picatinny rail under that for a VFG/low bipod?

Posted: 9/6/2017 9:35:09 AM EDT

[#9]

Posted: 9/6/2017 9:37:37 AM EDT

[#10]

Where did you find the bipod?

Posted: 9/6/2017 10:13:40 AM EDT

[#11]

I think I got the bipod at a gunshow a few years ago for around $60.

Posted: 9/6/2017 10:15:53 AM EDT

[#12]

I'm pretty sure I would pick one up for that price

Posted: 9/10/2017 10:36:28 AM EDT

[#13]

Posted: 9/10/2017 10:57:37 AM EDT

[#14]

My Korean Beta also had to be disassembled and put back together

Really can't trust it to run right.

I know with my homemade stock I can put too much down pressure on it and cause it to bind. I put a Fostech stock on a lower last night, now I need to see how it runs.

Posted: 9/10/2017 11:03:38 AM EDT

[#15]

Quote History

Quoted:
My Korean Beta also had to be disassembled and put back together

Really can't trust it to run right.

I know with my homemade stock I can put too much down pressure on it and cause it to bind. I put a Fostech stock on a lower last night, now I need to see how it runs.

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It would be neat if someone would make a stock with rollers on the inside to keep it centered on the buffer tube and running slick.

Posted: 9/11/2017 12:55:47 AM EDT

[#16]

Quote History

Quoted: It would be neat if someone would make a stock with rollers on the inside to keep it centered on the buffer tube and running slick.

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Hmmm.

Posted: 9/11/2017 1:24:49 AM EDT

[#17]

Didn't Undefined try something similar?

Posted: 9/12/2017 1:13:07 AM EDT

[#18]

Got it together, but can't seem to post pictures. Picked up a Sprinco orange spring and a shooting innovations aluminum carrier, along with a red x firing pin and pof roller cam pin. If fire season ever ends I will get out and put some rounds through it!

Posted: 9/12/2017 12:21:30 PM EDT

[#19]

Quote History

Quoted:
This is the first time I looked at this thread. While I can appreciate everyone's wanting to try full auto, I do not know how you can afford to shoot a bump fire frequently. I guess my experience shooting 3 rd burst and full auto proved to me I am wasting rounds since after 2 they normally miss. But it is your money and your fun and it does look like fun. I had to vote, "no they are stupid", but mine should have read; No they are not practical. I am a cheap bastard.

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thats actually why i put my bump stock on a dedicated 22lr ar instead. its easier to stomach counting nickles than it is quarters

Posted: 9/13/2017 3:45:59 AM EDT

[#20]

Quote History

Quoted:
Didn't Undefined try something similar?

View Quote

I vaguely remember somebody doing that to a vertical fore grip.

Posted: 9/13/2017 2:01:58 PM EDT

[#21]

Got it together, but can't seem to post pictures. Picked up a Sprinco orange spring and a shooting innovations aluminum carrier, along with a red x firing pin and pof roller cam pin. If fire season ever ends I will get out and put some rounds through it!

Posted: 9/13/2017 2:23:19 PM EDT

[#22]

Sounds good. Should be fun! I need to get mine out again.

Posted: 9/27/2017 9:57:46 PM EDT

[#23]

Bump for the BumpSAWs!

Posted: 10/3/2017 10:38:58 AM EDT

[#24]

Got my safety in yesterday. Had to do final fitting for my BumpSAW last night. Looks like jt will solve timing issues mechanically and I won't ever be able to outrun the bolt once it's installed. I cut a ledge on my trigger this interfaces with. It prevents the trigger from being pulled if the bolt isn't closed.

Posted: 10/3/2017 11:08:07 AM EDT

[#25]

Looks like the Democrats are going to go after bump-fire stocks.

Posted: 10/3/2017 11:28:19 AM EDT

[#26]

Yep, this could be the end of Slide Fire.

Posted: 10/3/2017 2:14:33 PM EDT

[#27]

keep the bullshit politics out of here please.

How much and where exactly did the cutting have to happen?

Posted: 10/3/2017 4:27:01 PM EDT

[#28]

Quote History

Quoted:
Yep, this could be the end of Slide do Fire.

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I don't think so. Their sales will probably go through the roof.

I'm going to buy a bump stock when all this shit dies down.

Trump is pres and Republicans are in control. They aren't going to do shit.

I bet all those folks that made fun of and put down these bumpSaw guys aren't laughing anymore....

Good for them. ( The bumpSaw guys)

Hats off to.you guys for inginuity!

Posted: 10/3/2017 4:40:47 PM EDT

[#29]

Quote History

Quoted:
keep the bullshit politics out of here please.

How much and where exactly did the cutting have to happen?

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At the very rear of the trigger, the portion that traditionally interfaces directly with the safety, I lowered it so my pivoting safety arm could rotate back and forth and would stop the trigger from being pulled if the bolt carrier hasn't closed yet. I'll try and get some pictures tonight or tomorrow.

Posted: 10/3/2017 4:57:13 PM EDT

[#30]

Quote History

Quoted:

At the very rear of the trigger, the portion that traditionally interfaces directly with the safety, I lowered it so my pivoting safety arm could rotate back and forth and would stop the trigger from being pulled if the bolt carrier hasn't closed yet. I'll try and get some pictures tonight or tomorrow.

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Damn ingenious!!!

Posted: 10/3/2017 5:51:32 PM EDT

[#31]

Quote History

Quoted:

At the very rear of the trigger, the portion that traditionally interfaces directly with the safety, I lowered it so my pivoting safety arm could rotate back and forth and would stop the trigger from being pulled if the bolt carrier hasn't closed yet. I'll try and get some pictures tonight or tomorrow.

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Still confused, I am a visual creature.

Posted: 10/3/2017 8:42:05 PM EDT

[#32]

Maybe these pictures will help you visualize it.

Posted: 10/3/2017 8:43:24 PM EDT

[#33]

In the gun the trigger sits a little farther forward, so the trigger has room to be pulled once the safety lever is disengaged.

Posted: 10/3/2017 9:34:32 PM EDT

[#34]

What do you guys think of the geissele B-GRF trigger for a bump gun? I think it's similar to the S3G.

Brownells link

Posted: 10/3/2017 9:38:29 PM EDT

[#35]

Quote History

Quoted:
What do you guys think of the geissele B-GRF trigger for a bump gun? I think it's similar to the S3G.

Brownells link

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I think there is a good chance it will struggle with timing issues like S3G's tend to.

Fostech echo is the only commercially sold trigger that will 100% control the timing issues of a bump gun.

Posted: 10/3/2017 9:46:39 PM EDT

[#36]

Quote History

Quoted:
I think there is a good chance it will struggle with timing issues like S3G's tend to.

Fostech echo is the only commercially sold trigger that will 100% control the timing issues of a bump gun.

View Quote View All Quotes

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Quote History

Quoted:

Quoted:
What do you guys think of the geissele B-GRF trigger for a bump gun? I think it's similar to the S3G.

Brownells link

I think there is a good chance it will struggle with timing issues like S3G's tend to.

Fostech echo is the only commercially sold trigger that will 100% control the timing issues of a bump gun.

A $500 trigger? Yowza. Guess you gotta pay to play.

Thanks for the quick response.

Posted: 10/3/2017 10:00:01 PM EDT

[#37]

Quote History

Quoted:
A $500 trigger? Yowza. Guess you gotta pay to play.

Thanks for the quick response.

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I've had good success with my JARD adjustable trigger and lots of folks have used RRA 2 stage triggers. Both are good cheaper options. I would recommend a lightweight bcg and XP spring with them.

The fostech has a safety that prevents pulling the trigger if the carrier hasn't closed, so it's going to be the most reliable option.

Posted: 10/3/2017 10:02:21 PM EDT

[#38]

Quote History

Quoted:
In the gun the trigger sits a little farther forward, so the trigger has room to be pulled once the safety lever is disengaged.

View Quote

I beg of you, please patent the design. Please.

Then, once all that is in place, sell half a dozen of them to me for $200 each.

A semi auto fire control group (plus safety) that prevents hammer follow and overrunning the carrier is the shit dreams are made of.

Posted: 10/3/2017 10:37:52 PM EDT

[#39]

Quote History

Quoted:

I beg of you, please patent the design. Please.

Then, once all that is in place, sell half a dozen of them to me for $200 each.

A semi auto fire control group (plus safety) that prevents hammer follow and overrunning the carrier is the shit dreams are made of.

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I just knew you would be along shortly!

Posted: 10/5/2017 11:04:56 PM EDT

[#40]

@Bigtwin

I believe you were looking for this thread.

Posted: 10/5/2017 11:44:17 PM EDT

[#41]

@jaqufrost - If your selector / FCG mods don't violate Fostech's patent you really should patent it.

And I really want to buy one... or 10.

Posted: 10/6/2017 11:28:52 AM EDT

[#42]

Quote History

Quoted:
@Bigtwin

I believe you were looking for this thread.

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Thank you, yes it was. I new I had seen the title but could not remember where.

Posted: 10/6/2017 11:36:20 AM EDT

[#43]

Here is skillets archived thread.
https://www.ar15.com/forums/general/Slide_Fire_haters_never_really_showed_up__Fire_and_movement_successful__Updated__8_25_2014__/5-1641834/?page=1

Here is his new thread.
https://www.ar15.com/forums/t_1_5/2011837_Official-BumpSAW-thread-version-3-0-.html

Posted: 10/6/2017 10:10:13 PM EDT

[#44]

I just recovered my original pictures from photobucket. Hopefully I can update the first and second post for everyone who wants to see how I made the stock.

Posted: 10/6/2017 10:50:45 PM EDT

[#45]

Quote History

Quoted:
I just recovered my original pictures from photobucket. Hopefully I can update the first and second post for everyone who wants to see how I made the stock.

View Quote

Posted: 10/6/2017 10:52:37 PM EDT

[#46]

Should be mostly fixed now.

Posted: 10/7/2017 8:16:13 AM EDT

[#47]

Quote History

Quoted:
I just recovered my original pictures from photobucket. Hopefully I can update the first and second post for everyone who wants to see how I made the stock.

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Did you have to pay the ransom?