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Posted: 10/19/2017 12:34:09 PM EDT
[#1]
Quote HistoryQuoted:
How did I miss this post? @jaqufrost that's pure brilliance. 
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Posted: 10/24/2017 11:48:29 PM EDT
[#2]
BUMP because, well...AWESOME!
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Posted: 10/30/2017 10:58:53 PM EDT
[#3]
LSW Testing
(If someone with a membership would embed, that would be awesome) My theory hinges on the fact that maximum rate of fire, while awesome on the range and downright terrifying downrange for short periods, is not especially practical for a magazine-fed individual weapon. Instead, I believe that a lower rate of fire, say 400rpm, will balance suppression with managing barrel heat and ammunition consumption. This will allow the weapon to stay in the fight longer before needing to cool the barrel or exhausting ammunition. I suspect that a light single-stage trigger will be ideal for this role; I have considered binary triggers but I honestly don't think (at this time) they are worth the expense. However, calling such a weapon a SAW doesn't quite work. I'm thinking that LSW, or Light Support Weapon, is probably a better term. It has better sustained-fire capability than a standard rifle or carbine, while only gaining a couple pounds in weight, but is not on the same level as a 249. Frankly, given the context in which it would be utilized, it doesn't need to be. Ammunition will probably be carried in a single D60, to be loaded in the weapon when on a patrol, and a large number of 40-round magazines. The D60 will provide massive initial firepower when reacting to or initiating contact. It would be great to carry all rounds in D60s, but they are very bulky and not suitable to being carried on individual LBE in quantity. The 40-rounders seem to be a good compromise between capacity and size. |
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Posted: 10/30/2017 11:04:52 PM EDT
[#4]
Quote History Light Support AR-15 - First Shots I think the most common mag to feed bumpSAWs will be the standard 30 rounder, so tactics and SOP should be based on that. 40s, 60s, 90s, 100s, 150s, & belt feds are nice, but not the norm. I agree w/ you on the ROF - similar to the M1918A2, which was limited to a 20 round mag. |
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Posted: 10/30/2017 11:19:24 PM EDT
[#5]
Quote HistoryQuoted:
I think the most common mag to feed bumpSAWs will be the standard 30 rounder, so tactics and SOP should be based on that. 40s, 60s, 90s, 100s, 150s, & belt feds are nice, but not the norm. - |
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Posted: 10/30/2017 11:51:42 PM EDT
[#6]
Quote HistoryQuoted:
LSW Testing (If someone with a membership would embed, that would be awesome) My theory hinges on the fact that maximum rate of fire, while awesome on the range and downright terrifying downrange for short periods, is not especially practical for a magazine-fed individual weapon. Instead, I believe that a lower rate of fire, say 400rpm, will balance suppression with managing barrel heat and ammunition consumption. This will allow the weapon to stay in the fight longer before needing to cool the barrel or exhausting ammunition. I suspect that a light single-stage trigger will be ideal for this role; I have considered binary triggers but I honestly don't think (at this time) they are worth the expense. However, calling such a weapon a SAW doesn't quite work. I'm thinking that LSW, or Light Support Weapon, is probably a better term. It has better sustained-fire capability than a standard rifle or carbine, while only gaining a couple pounds in weight, but is not on the same level as a 249. Frankly, given the context in which it would be utilized, it doesn't need to be. Ammunition will probably be carried in a single D60, to be loaded in the weapon when on a patrol, and a large number of 40-round magazines. The D60 will provide massive initial firepower when reacting to or initiating contact. It would be great to carry all rounds in D60s, but they are very bulky and not suitable to being carried on individual LBE in quantity. The 40-rounders seem to be a good compromise between capacity and size. poppycockle! 
In all seriousness though LSW probably does describe it a tad better, even if my stick respectfully disagrees 
30 rounders are more viable if moving, and not stationary. Welcome to the discussion 
Pics of your device? Looks pretty compact |
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Posted: 10/31/2017 12:21:20 AM EDT
[#7]
Quote HistoryThat's fantastic - a true bump SAW!
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Posted: 10/31/2017 12:43:16 AM EDT
[#8]
"Ammunition will probably be carried in a single D60, to be loaded in the weapon when on a patrol, and a large number of 40-round magazines. The D60 will provide massive initial firepower when reacting to or initiating contact. It would be great to carry all rounds in D60s, but they are very bulky and not suitable to being carried on individual LBE in quantity. The 40-rounders seem to be a good compromise between capacity and size."
That makes sense, and is in line with both the RPK and AUG HBAR- which rely on their 42-45rd magazines. A D60 + 6x40rds bandolier is a 300rd loadout, which is about 1/2 a SAW loadout - pretty practical for an Automatic Rifle /LSW concept. |
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Posted: 10/31/2017 12:46:00 AM EDT
[#9]
Quote HistoryQuoted:
I think the most common mag to feed bumpSAWs will be the standard 30 rounder, so tactics and SOP should be based on that. 40s, 60s, 90s, 100s, 150s, & belt feds are nice, but not the norm. I agree w/ you on the ROF - similar to the M1918A2, which was limited to a 20 round mag. |
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Posted: 10/31/2017 9:05:27 AM EDT
[#10]
Quote HistoryQuoted: 47-round pan mag is coming soon for the BumpLewis! I still have a Lego bumpstock in the back of my mind, which of course could be built upside down, allowing us to run a bump BREN with offset red dots. It would also permit a 10 round ammo hopper for the poor bastards behind enemy lines, which could be topped off w/ stripper clips. |
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Posted: 10/31/2017 11:12:47 AM EDT
[#11]
Quote HistoryQuoted:
@SoutherPhantom poppycockle!
In all seriousness though LSW probably does describe it a tad better, even if my stick respectfully disagrees
30 rounders are more viable if moving, and not stationary. Welcome to the discussion
Pics of your device? Looks pretty compact Pics as requested: 
The bottom weapon is the LSW. It only has a BUIS right now; a BDC prism optic is next on the list. Barrel is a 20" CL HBAR from Del-Ton. |
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Posted: 10/31/2017 11:36:20 AM EDT
[#12]
Quote HistoryQuoted:
That is an awesome build you've got there! Pics as requested: http://i.imgur.com/JO3USQs.jpg The bottom weapon is the LSW. It only has a BUIS right now; a BDC prism optic is next on the list. Barrel is a 20" CL HBAR from Del-Ton. |
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Posted: 10/31/2017 11:43:58 AM EDT
[#13]
Quote HistoryQuoted:
So you have no mods to the gun? Relying on grip alone to actuate bump? I wasn't technically bump-firing the weapon, just pulling the trigger very quickly from a bipod-braced position 
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Posted: 10/31/2017 11:47:22 AM EDT
[#14]
Quote HistoryQuoted:
That is an awesome build you've got there! Pics as requested: http://i.imgur.com/JO3USQs.jpg The bottom weapon is the LSW. It only has a BUIS right now; a BDC prism optic is next on the list. Barrel is a 20" CL HBAR from Del-Ton. Going to make a full loadout for it? IIRC M27 gunners are issued 21 of the 30's. |
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Posted: 10/31/2017 12:21:38 PM EDT
[#15]
Quote HistoryQuoted:
Which prism optic do you plan to use? Going to make a full loadout for it? IIRC M27 gunners are issued 21 of the 30's. I certainly plan on acquiring something like a full loadout. 1x D60 and 6x PMAG-40 will be the starting point @300 rounds, and I may go up to 380, 420, or 460 depending on what type of LBE I use with it. That many magazines may get a bit cumbersome with plates. |
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Posted: 11/2/2017 10:23:45 AM EDT
[#16]
After fiddling a bit with the 2.5x, I don't think it's the correct optic for this weapon. I'm now leaning towards an open holographic sight with a magnifier, or maybe a 3x or 5x PA prism for the better BDC design. FOV is key for this application.
Anyone else have experience with different optics on a bumpSAW/LSW/IAR? I'd like effective fires out to at least 500m. |
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Posted: 11/2/2017 10:41:09 AM EDT
[#17]
I tried the PA 5x prism. The eye relief wasn't enough for me when properly shouldering the stock. I'm looking at the Vortex UH-1, but some bills need to come first. Or the money may go towards getting my MV Agusta F3
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Posted: 11/2/2017 10:43:20 AM EDT
[#18]
I've been happy with the 3x burris, but I don't care for the 5x model as much.
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Posted: 11/2/2017 10:50:16 AM EDT
[#19]
Quote HistoryQuoted:
I tried the PA 5x prism. The eye relief wasn't enough for me when properly shouldering the stock. I'm looking at the Vortex UH-1, but some bills need to come first. Or the money may go towards getting my MV Agusta F3 |
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Posted: 11/4/2017 6:00:56 PM EDT
[#20]
@King_Mud
Welcome to the fray
For us wrong handed folks, they do make most of the bump stocks in left handed models. The SSAR-15 MOD has the shelf that is pretty easy to flip between left and right handed. The fostech, like I have, has an individual piece that screws into the bottom of the stock that is attached to the pistol grip. So not a very easy thing to switch to right handed if you have others that want to shoot it. I simply tell them to adapt, I have to adapt to all their right handed bullshit and I do just fine
So when you going to build one?
 ar15 bumpsaw m249para :D |
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Posted: 11/4/2017 6:08:21 PM EDT
[#21]
I really need some more range time
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Posted: 11/4/2017 7:47:41 PM EDT
[#22]
Quote HistoryQuoted:
I really need some more range time 
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Posted: 11/5/2017 4:53:28 PM EDT
[#23]
Swapped to the Sharps XRC bcg. I needed it to activate my automatic safety block - shown in the safety on position.
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Posted: 11/5/2017 4:54:31 PM EDT
[#24]
Here is the sharps bcg.
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Posted: 11/6/2017 4:58:25 PM EDT
[#25]
Quote HistoryQuoted:
@King_Mud Welcome to the fray
For us wrong handed folks, they do make most of the bump stocks in left handed models. The SSAR-15 MOD has the shelf that is pretty easy to flip between left and right handed. The fostech, like I have, has an individual piece that screws into the bottom of the stock that is attached to the pistol grip. So not a very easy thing to switch to right handed if you have others that want to shoot it. I simply tell them to adapt, I have to adapt to all their right handed bullshit and I do just fine
https://www.budsgunshop.com/catalog/images/hiRes/411554403_1.jpg So when you going to build one?
https://i.imgur.com/UUlNg8w.jpg https://i.imgur.com/A2UWl3A.jpg  https://www.youtube.com/watch?v=VLpYlxLc1vU |
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Posted: 11/6/2017 5:25:23 PM EDT
[#26]
Quote HistoryQuoted:
Interdasting. Thanks for the link. I’m gonna read up on this thread as I don’t know anything about these things.
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Posted: 11/6/2017 5:41:10 PM EDT
[#27]
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Posted: 11/6/2017 8:05:24 PM EDT
[#28]
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Posted: 11/12/2017 9:49:42 AM EDT
[#29]
@mbell just posted a nice video of his IAR upper build. He used the Colt handguard from their IAR entry and mixed it with a gas piston from superlative and an SRC bolt. Very interesting setup and I'm looking forward to the video on how it shoots.
 IAR M27 Upper Receiver Build: Knight's Armament, Superlative Arms & Bear Creek Arsenal These handguards are $300 on gunbroker. I'm tempted to pick one up. http://www.gunbroker.com/item/717150421 |
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Posted: 11/12/2017 11:43:06 AM EDT
[#30]
A new contender arises:
http://www.ar15.com/forums/ar-15/would-building-this-22-be-legal-/15-720079/  Attached File |
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Posted: 11/23/2017 1:18:59 PM EDT
[#31]
Happy Thanskgiving to the bumpcrew. Have a safe and Happy holiday
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Posted: 11/23/2017 1:23:46 PM EDT
[#32]
Thanks
Happy Thanksgiving to you as well
AIM has the Sharps DLC BCG on sale 15% off. |
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Posted: 11/23/2017 3:01:48 PM EDT
[#33]
Quote HistoryQuoted:
Thanks Happy Thanksgiving to you as well
AIM has the Sharps DLC BCG on sale 15% off.
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Posted: 11/23/2017 3:17:59 PM EDT
[#34]
Quote HistoryQuoted: Link? Shows OOS https://www.aimsurplus.com/product.aspx?item=XSRXPB&name=Sharps+Rifle+XPB+(Xtreme+Performance+Bolt)+Carrier+Group&groupid=723 |
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Posted: 11/23/2017 5:35:47 PM EDT
[#35]
Quote HistoryQuoted:
The bolt is OOS but the whole BCG is still available. https://www.aimsurplus.com/product.aspx?item=XSRXPB&name=Sharps+Rifle+XPB+(Xtreme+Performance+Bolt)+Carrier+Group&groupid=723
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Posted: 11/24/2017 7:56:14 PM EDT
[#36]
in.
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Posted: 11/24/2017 8:30:22 PM EDT
[#37]
Quote HistoryQuoted:
in.
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Posted: 11/24/2017 8:58:01 PM EDT
[#38]
Whelp, AIM was oos, but Optics Planet had it, used one of Jesse's coupons for 10% off so it was $64.79
Close enough. Has anyone here attempted to lighten a Fostech stock? I need to find some ways to lighten up my build. Thinking of reprofiling the barrel with aluminum cooling fins. What sayeth the hive? |
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Posted: 11/24/2017 9:20:34 PM EDT
[#39]
I haven't tried cutting weight yet.
I just ordered parts for two new uppers. KAC 13.5" URX 3.1 rails. SRC BCG's. Faxon gas blocks. Aero T marked uppers. Should be fun
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Posted: 11/24/2017 11:02:49 PM EDT
[#40]
My next purchase is going to be a 45-70 and a Hybrid
Should have the 45-70 before xmas. The bumpsaw will have to do without a little brother for the foreseeable future
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Posted: 11/26/2017 2:55:00 AM EDT
[#41]
3-D printed bumpfire stock w/ $5 in materials:
http://www.ar15.com/forums/ar-15/3d-printed-stock/4-720678/ 
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Posted: 11/26/2017 3:29:35 AM EDT
[#42]
I do not need a 3d printer
I do not need a 3d printer I do not need a 3d printer I do not need a 3d printer I do not need a 3d printer
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Posted: 11/26/2017 3:31:22 AM EDT
[#43]
Quote HistoryQuoted: Is Florida Man ever out? |
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Posted: 12/10/2017 9:16:24 AM EDT
[#44]
I just received my Whiskey Arms LBC aluminum BCG. I’m looking forward to testing it with my BumpSAW.
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Posted: 12/15/2017 12:00:34 AM EDT
[#45]
Quote HistoryQuoted:
I just received my Whiskey Arms LBC aluminum BCG. I'm looking forward to testing it with my BumpSAW. https://www.ar15.com/media/mediaFiles/64548/CAFFCFB7-9858-4FCD-8C38-2AB662D7FD6D-386546.jpg My aluminum bcg seemed like it was a little harder to bump with. I think my upper weight was on the heavy side and mixed with the light bolt carrier I wasn't getting the recoil I needed to bump easily. Didn't help that I was trying to use a beta mag. |
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Posted: 12/15/2017 12:01:40 AM EDT
[#46]
My new bump upper.
Got another almost the same in the works. Second one has DLC coated bcg instead of FDE. |
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Posted: 12/15/2017 2:48:03 AM EDT
[#47]
Nice. Hopefully Wed I'll make it to the range to run the reliabolt a bit.
Fluted upper? Can't tell on the cell |
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Posted: 12/15/2017 3:15:01 AM EDT
[#48]
Quote HistoryQuoted:
Nice. Hopefully Wed I'll make it to the range to run the reliabolt a bit. Fluted upper? Can't tell on the cell |
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Posted: 12/15/2017 6:21:48 AM EDT
[#49]
Quote HistoryQuoted:
Looks like a Nitrided HBAR to me. |
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Posted: 12/15/2017 1:49:25 PM EDT
[#50]
Nice.
Looked fluted on my phone
I have a bear creek upper receiver on my bumpsaw. I like it. I really need to get a cheapo upper for a trunk gun.
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