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Posted: 7/18/2014 5:01:59 PM EDT
So I did a quick glance and didnt see much on these but maybe I missed it. I picked up one of these lower kits http://www.theflatspot.net/ar-15-receiver-flat.html

So being from Illinois, hunting deer with a standard ar15 is out of the question. We do however have a pistol option. The law says the pistol has to be either single shot or a revolver. Max case length (if bottleneck) is 1.4". One day I was in my garage trimming some cases for my 300 blackout rifle when it occured to me that this round may work. After some research, 300 blackout should be a legal round to deer hunt with as long as its not a FMJ round.

I began thinking about a single shot pistol build and ran across the Jack squat steel lower kit. With this kit and a mig welder i realized it would be really easy to build a single shot ar lower cheap.

Here is the basic kit as it comes.
http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140627_131051106_zps0v9qe84e.jpg

And here are some of the build highlights.
http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140627_132234432_zps3wljm3au.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140627_133011289_zps58ugx6ee.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140627_133639867_HDR_zpsnw4sjeje.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140627_142040590_HDR_zps3xddcumt.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140627_142054053_HDR_zpsm2iiycr4.jpg

I got a bunch of blem buffer tubes and parts from JSE. Work great for the build. you will see where I welded a spare castle nut into the lower in picture coming. Easier than buying the tap.
http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140708_162549888_zpshtoeenut.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140715_145015821_zpshohiyibx.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140715_145024727_HDR_zpsvybjjm1b.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140715_150825270_HDR_zps6hkapi6a.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140715_153148192_zpszldaiv6g.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140715_154501890_zpsxbsyrgw5.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140715_160224484_zps6izhgvcx.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140715_161836670_HDR_zpskvet8mna.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140715_163514661_zps7rdvmbqn.jpg

Welding roll pins into the lower. the inside diameter is great for detent pins.
http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_144628998_zpszbnbzgfc.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_144802959_zpsfgbvqbz4.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_150723282_HDR_zpsnqavybcl.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_151005007_HDR_zpsfmz4vpts.jpg

Next is the single shot bolt catch conversion. I relocated the bolt catch detent so it will catch the bolt on each shot.
http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_162359472_zpsk9hnwely.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_163850379_zpsskh72oho.jpg

I drove a short roll pin into the factory bolt catch hole to limit the travel of the catch
http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_165248729_HDR_zpsvuvqa3mr.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_165440532_HDR_zpsbjdj0jag.jpg

1" Dowel rod works great for buffer tube alignment.
http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_171519983_zpslvyw3jqk.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_173101134_zpsan46jxfg.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_173642769_zpshvdwwudg.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_173646880_zpsyzbujlbp.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_175608158_HDR_zpsc1camsgh.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_175612234_zpsifylc0jt.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140717_180358013_HDR_zpsfyk1behf.jpg

When I welded in the castle nut I didnt realize that the nut stuck out so I had to use 2 buffer plates and make one.
http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140718_165538624_zpskmolo2ur.jpg

After some major grinding and metal finishing but not done yet. this is how it sits today.
http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140718_171416898_zpsd7swg66c.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140718_174320540_zpsuh8wst24.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140718_174326548_zpspo8ptq5c.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140718_174341526_HDR_zpse1ktmkpv.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140718_180049989_zpskwathnpa.jpg

Seems to function well. I am going to throw an upper on tomorrow and test a round through it.

Hope this thread helps if anyone is building one of these. They are inexpensive but they do weight more than the normal aluminum lowers. Still a fun project.


Link Posted: 7/18/2014 5:05:28 PM EDT
[#1]
That would look really cool with a rust blue finish.
Link Posted: 7/18/2014 5:10:30 PM EDT
[#2]
Looks like a lot of work. Great job!
Link Posted: 7/18/2014 5:12:56 PM EDT
[#3]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Looks like a lot of work. Great job!
View Quote


It is alot of work but Its alot of fun. Some people use a tig and still use end mills and other tools. I used a mig welder, had files, an air cut off tool and a hand grinder for the majority of the work. Mine is a little more complicated to due to the bolt catch mod and cutting the magwell sides.
Link Posted: 7/18/2014 5:16:24 PM EDT
[#4]
I'd like to do one someday. Not sure I can in New Germany (NJ)  though. I too only have a mig welder, air grinders/disc sanders and other automotive tools.
Link Posted: 7/18/2014 5:24:21 PM EDT
[#5]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
I'd like to do one someday. Not sure I can in New Germany (NJ)  though. I too only have a mig welder, air grinders/disc sanders and other automotive tools.
View Quote


Auto tools are all I used. The only tools i bought for this was a cheap set of files. idk about the new jersey think though.
Link Posted: 7/18/2014 5:25:35 PM EDT
[#6]
Well done!  Did you take the front mag well plate & put it on top of the mag well?
Link Posted: 7/18/2014 5:35:50 PM EDT
[#7]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Well done!  Did you take the front mag well plate & put it on top of the mag well?
View Quote


No, I cut the front plate down and welded part of it in. My plan is to make a floor and weld it in so that i can lay a round in and close the bolt but I haven't got that far yet.
Link Posted: 7/18/2014 7:12:02 PM EDT
[#8]
You could weld one of these in place, remove the spring, and JB Weld the follower to the front slider...

http://www.cammenga.com/223-20-Round-Magazine-p/em2-556.htm

Link Posted: 7/18/2014 7:18:10 PM EDT
[#9]
actually my brother-in-law brought me a bunch of steel mags. I am going to pick the roughest one and cut it up and weld part of it in. I think i have a plan on the follower part too.
Link Posted: 7/19/2014 7:51:27 PM EDT
[#10]
Well I got my upper parts. 10.5" Barrel, A2 flash hider, low pro gas block, pistol length gas tube and vector 7" free float hand guard. All parts are from MAS Defense. I have had excellent luck with them and they ship extremely fast.

I put the upper together and installed my AIM surplus bcg and test ran the gun. works great. fires one round, auto ejects the case and locks the bolt back. I plan on taking the thing apart and adding the magwell floor and then onto finishing the lower.

I most likely will powdercoat but i might use duracoat. I haven't decided. I have no problem painting the lower but for some reason I feel weird about painting the upper but this is my 4th ar and besides some flat dark earth on one, they are all black. I am thinking some kind of fall camo pattern.

anyway just a couple pics for now.

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140719_122341793_zps2pmrm9b5.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140719_122346238_zpsobzvev8q.jpg
Link Posted: 7/19/2014 9:02:25 PM EDT
[#11]
That's an outstanding hunting arm.
Link Posted: 7/20/2014 3:19:03 PM EDT
[#12]
I'm not sure of your local laws but do you need to install a pistol buffer tube so the "law" doesn't think you will put a stock on there and have an illegal short barrel rifle?  Just a thought. Hate to see anyone in trouble for not covering your ass.
Link Posted: 7/20/2014 5:06:47 PM EDT
[#13]
very nice



I really like the cut out magwell,looks slick
Link Posted: 7/20/2014 5:12:37 PM EDT
[#14]
Great job!  I've been watching these threads for ideas and work-arounds.  Your final filled and ground receiver looks great.  I've got one nearly finished and a couple spare kits on the shelf.  My biggest obstacles are imprecise welds from my cheap machine and my inexperience welding.  I haven't finished mine, work and travel, plus got focused on a 7.62 AR upper build.  Here are two other threads on the same subject and different approaches.

Steel AR Flats

Welded together a receiver
Link Posted: 7/20/2014 6:06:45 PM EDT
[#15]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
I'm not sure of your local laws but do you need to install a pistol buffer tube so the "law" doesn't think you will put a stock on there and have an illegal short barrel rifle?  Just a thought. Hate to see anyone in trouble for not covering your ass.
View Quote


BATFE doesn't require any specific buffer tube for a pistol - pistol tube, entry tube, carbine (commercial or mil-spec), or rifle tube, all are fine under Federal law.
Link Posted: 7/20/2014 6:17:09 PM EDT
[#16]
Discussion ForumsJump to Quoted PostQuote History
Quoted:


BATFE doesn't require any specific buffer tube for a pistol - pistol tube, entry tube, carbine (commercial or mil-spec), or rifle tube, all are fine under Federal law.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:
I'm not sure of your local laws but do you need to install a pistol buffer tube so the "law" doesn't think you will put a stock on there and have an illegal short barrel rifle?  Just a thought. Hate to see anyone in trouble for not covering your ass.


BATFE doesn't require any specific buffer tube for a pistol - pistol tube, entry tube, carbine (commercial or mil-spec), or rifle tube, all are fine under Federal law.

 
Thanks for the info...you learn something new everyday. Living behind enemy lines (NJ), we are on constant alert.
Link Posted: 7/20/2014 6:29:31 PM EDT
[#17]
Discussion ForumsJump to Quoted PostQuote History
Quoted:

 
Thanks for the info...you learn something new everyday. Living behind enemy lines (NJ), we are on constant alert.
View Quote View All Quotes
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Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:
Quoted:
I'm not sure of your local laws but do you need to install a pistol buffer tube so the "law" doesn't think you will put a stock on there and have an illegal short barrel rifle?  Just a thought. Hate to see anyone in trouble for not covering your ass.


BATFE doesn't require any specific buffer tube for a pistol - pistol tube, entry tube, carbine (commercial or mil-spec), or rifle tube, all are fine under Federal law.

 
Thanks for the info...you learn something new everyday. Living behind enemy lines (NJ), we are on constant alert.


Last I heard, you could own neutered ARs w/15 round magazines and couldn't effectively hunt deer.  Has anything in NJ changed since Sandy Hook?
Link Posted: 7/20/2014 6:44:46 PM EDT
[#18]
Discussion ForumsJump to Quoted PostQuote History
Quoted:

 
Thanks for the info...you learn something new everyday. Living behind enemy lines (NJ), we are on constant alert.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:
Quoted:
I'm not sure of your local laws but do you need to install a pistol buffer tube so the "law" doesn't think you will put a stock on there and have an illegal short barrel rifle?  Just a thought. Hate to see anyone in trouble for not covering your ass.


BATFE doesn't require any specific buffer tube for a pistol - pistol tube, entry tube, carbine (commercial or mil-spec), or rifle tube, all are fine under Federal law.

 
Thanks for the info...you learn something new everyday. Living behind enemy lines (NJ), we are on constant alert.


This is why I didn't worry about testing it with the carbine buffer. I also don't have any extra buttstocks so showing intent is a little harder, but either way I just ordered a pistol tube. My plan was to shave the carbine tube but for the price i just ordered a pistol tube.

Getting ready for a little more cleanup and paint. I still have to figure that out. I really don't want another black gun so I have to figure out a color scheme.
Link Posted: 7/20/2014 9:37:26 PM EDT
[#19]
Color case hardening FTW!  
Link Posted: 7/20/2014 10:33:13 PM EDT
[#20]
Very cool idea! I am from Illinois and can tell you I never thought of this.

To be honest bow hunting got to be just too time and money consuming, so it wasn't until moving to Kentucky that I started hunting again, but with a rifle. We have family land though and I've always wanted to go back, but now I'm just spoiled from rifle hunting. What kind of load are you going to run? Do you know if there were any bullets that put you over the case length limit?

ETA Think you will try to run a Sig brace?
Link Posted: 7/21/2014 6:31:16 PM EDT
[#21]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Very cool idea! I am from Illinois and can tell you I never thought of this.

To be honest bow hunting got to be just too time and money consuming, so it wasn't until moving to Kentucky that I started hunting again, but with a rifle. We have family land though and I've always wanted to go back, but now I'm just spoiled from rifle hunting. What kind of load are you going to run? Do you know if there were any bullets that put you over the case length limit?

ETA Think you will try to run a Sig brace?
View Quote


I get the sig brace question a lot and as of now its a no. For one this gun will attract plenty of attention on its own. I am well aware the sig brace is perfectly legal I just dont want the possible hassle it may bring. Also its not really in my budget at this time and I am more of a simplistic gun fan. The quad rail is actually a first for me on this gun.

as for ammo, I have had a couple thoughts.

Remington Hog Hammer

Hornady 300 vmax

Barnes Vortex

These were a thought. It can not be FMJ for deer so that limits me a bit but no biggie
Link Posted: 7/22/2014 7:52:56 AM EDT
[#22]
Against my better judgement...








I LIKE IT!!

Link Posted: 7/22/2014 8:22:00 AM EDT
[#23]
Mama said "Don't say anything if you can't say something nice"...well I respect your abilities to build that thing...there...I said something nice...but it is truly ugly. The stamps in the receiver are just pitiful.  I suppose in a post apocalyptic world it would be awesome. The amount of cleanup required will be epic. As far as being cheap...blem lowers for $50 are rather inexpensive.  It would take me $1000 in time to build one like that.  Always enjoy watching someone build something from nothing.  Waiting on the final product.
Link Posted: 7/22/2014 9:27:10 AM EDT
[#24]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Mama said "Don't say anything if you can't say something nice"...well I respect your abilities to build that thing...there...I said something nice...but it is truly ugly. The stamps in the receiver are just pitiful.  I suppose in a post apocalyptic world it would be awesome. The amount of cleanup required will be epic. As far as being cheap...blem lowers for $50 are rather inexpensive.  It would take me $1000 in time to build one like that.  Always enjoy watching someone build something from nothing.  Waiting on the final product.
View Quote


With this project, the money in the lower whether it be in supplies, the kit or time is irrelevant. Its more about the satisfaction of the build. I know the stamps are rough. I plan some more clean up but I am not too worried about it being perfect as the whole idea is to hunt with it. It will see the field and get scratched and nicked so perfection is not required.

on a side note, a $50 blem lower is not really useful in this situation as the whole idea was to make a dedicated single shot lower.
Link Posted: 7/22/2014 9:53:28 AM EDT
[#25]
I guess the idea of building an off the books, single shot purpose built lower, for low dollar, escapes some people. A $50 blemishes lower will also cost shipping and transfer fees, so that $50 lower ends up costing around $90 & on top of that you have to do the paperwork. With this build, all the government knows is that you bought some steel.
Link Posted: 7/22/2014 10:34:53 AM EDT
[#26]
Discussion ForumsJump to Quoted PostQuote History
Quoted:


With this project, the money in the lower whether it be in supplies, the kit or time is irrelevant. Its more about the satisfaction of the build. I know the stamps are rough. I plan some more clean up but I am not too worried about it being perfect as the whole idea is to hunt with it. It will see the field and get scratched and nicked so perfection is not required.

on a side note, a $50 blem lower is not really useful in this situation as the whole idea was to make a dedicated single shot lower.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:
Mama said "Don't say anything if you can't say something nice"...well I respect your abilities to build that thing...there...I said something nice...but it is truly ugly. The stamps in the receiver are just pitiful.  I suppose in a post apocalyptic world it would be awesome. The amount of cleanup required will be epic. As far as being cheap...blem lowers for $50 are rather inexpensive.  It would take me $1000 in time to build one like that.  Always enjoy watching someone build something from nothing.  Waiting on the final product.


With this project, the money in the lower whether it be in supplies, the kit or time is irrelevant. Its more about the satisfaction of the build. I know the stamps are rough. I plan some more clean up but I am not too worried about it being perfect as the whole idea is to hunt with it. It will see the field and get scratched and nicked so perfection is not required.

on a side note, a $50 blem lower is not really useful in this situation as the whole idea was to make a dedicated single shot lower.


Don't worry - some people can't read.
Link Posted: 7/23/2014 5:49:33 AM EDT
[#27]
Discussion ForumsJump to Quoted PostQuote History
Quoted:


Last I heard, you could own neutered ARs w/15 round magazines and couldn't effectively hunt deer.  Has anything in NJ changed since Sandy Hook?
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:
Quoted:
Quoted:
I'm not sure of your local laws but do you need to install a pistol buffer tube so the "law" doesn't think you will put a stock on there and have an illegal short barrel rifle?  Just a thought. Hate to see anyone in trouble for not covering your ass.


BATFE doesn't require any specific buffer tube for a pistol - pistol tube, entry tube, carbine (commercial or mil-spec), or rifle tube, all are fine under Federal law.

 
Thanks for the info...you learn something new everyday. Living behind enemy lines (NJ), we are on constant alert.


Last I heard, you could own neutered ARs w/15 round magazines and couldn't effectively hunt deer.  Has anything in NJ changed since Sandy Hook?



There was a big push to go from 15 round magazines down to 10 but Governor Christie (maybe our next president but not sure I like that idea) vetoed the bill. As far as deer hunting, we are a pretty flat state so the use of rifles for hunting has always been illegal. Slug guns are the firearm of choice here. We take our rifles to Pennsylvania to hunt.
Link Posted: 7/23/2014 7:44:53 AM EDT
[#28]
the weld engineer in me would change some of the butt, lap, and simple fillet joints to bevel and groove weld joints... then TIG it up. Not too sure if I would final machine it on a mill or not. As for finish... I'm a big fan of case coloring, but its hard to pull off at home without some pretty pricey equipment and controls (and experimentation, let along supporting your workpeice so it doesn't warp like crazy). either find a place close to you willing to do it for you, or do something else is my recommendation.

Link Posted: 7/23/2014 2:22:44 PM EDT
[#29]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
the weld engineer in me would change some of the butt, lap, and simple fillet joints to bevel and groove weld joints... then TIG it up. Not too sure if I would final machine it on a mill or not. As for finish... I'm a big fan of case coloring, but its hard to pull off at home without some pretty pricey equipment and controls (and experimentation, let along supporting your workpeice so it doesn't warp like crazy). either find a place close to you willing to do it for you, or do something else is my recommendation.

View Quote


some of the welds in major areas are bevel and groove. Its not structural steel welding so i figure the butt welds are okay in most cases. My mig was getting some decent penetration where needed. What final machining are you talking about?
Link Posted: 7/23/2014 4:00:44 PM EDT
[#30]
just to get machined flats, radii, and really you could do anything you really wanted to at that point as far as details, design, etc. with bevel welds ground flat you can get very tight corners also.
Link Posted: 7/23/2014 4:08:18 PM EDT
[#31]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
just to get machined flats, radii, and really you could do anything you really wanted to at that point as far as details, design, etc. with bevel welds ground flat you can get very tight corners also.
View Quote


They're $25 + $6 flat shipping.  Why don't you get one or two and show us what you're talking about?
Link Posted: 7/24/2014 4:20:36 AM EDT
[#32]
sounds like a plan... i could use another lower anyways, though I would bet its a bit heavier than I really wanted, LOL.
Link Posted: 7/24/2014 9:34:09 AM EDT
[#33]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
sounds like a plan... i could use another lower anyways, though I would bet its a bit heavier than I really wanted, LOL.
View Quote


http://www.theflatspot.net/ar-15-receiver-flat.html
Link Posted: 7/24/2014 11:06:29 AM EDT
[#34]
Finished mine last night.  Turned out pretty good IMHO.  Final weight = 1 lb. 5 oz stripped with finish applied.

Link Posted: 7/24/2014 11:24:30 AM EDT
[#35]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
I guess the idea of building an off the books, single shot purpose built lower, for low dollar, escapes some people. A $50 blemishes lower will also cost shipping and transfer fees, so that $50 lower ends up costing around $90 & on top of that you have to do the paperwork. With this build, all the government knows is that you bought some steel.
View Quote


If it's a single shot, or even manually operated, do you need the buffer tube at all?
Link Posted: 7/24/2014 11:32:06 AM EDT
[#36]

Discussion ForumsJump to Quoted PostQuote History
Quoted:
If it's a single shot, or even manually operated, do you need the buffer tube at all?
View Quote View All Quotes
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Discussion ForumsJump to Quoted PostQuote History
Quoted:



Quoted:

I guess the idea of building an off the books, single shot purpose built lower, for low dollar, escapes some people. A $50 blemishes lower will also cost shipping and transfer fees, so that $50 lower ends up costing around $90 & on top of that you have to do the paperwork. With this build, all the government knows is that you bought some steel.




If it's a single shot, or even manually operated, do you need the buffer tube at all?
You're going to need the room to retract the BCG to extract the spent round and chamber a new one...

 
Link Posted: 7/24/2014 11:51:04 AM EDT
[#37]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
You're going to need the room to retract the BCG to extract the spent round and chamber a new one...  
View Quote View All Quotes
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Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:
Quoted:
I guess the idea of building an off the books, single shot purpose built lower, for low dollar, escapes some people. A $50 blemishes lower will also cost shipping and transfer fees, so that $50 lower ends up costing around $90 & on top of that you have to do the paperwork. With this build, all the government knows is that you bought some steel.


If it's a single shot, or even manually operated, do you need the buffer tube at all?
You're going to need the room to retract the BCG to extract the spent round and chamber a new one...  


But why do you need the tube itself?  Just let the BC slide out of the back of the receiver similar to a lever action.
Link Posted: 7/24/2014 12:49:42 PM EDT
[#38]

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Quoted:
But why do you need the tube itself?  Just let the BC slide out of the back of the receiver similar to a lever action.
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Quoted:



Quoted:


Quoted:


Quoted:

I guess the idea of building an off the books, single shot purpose built lower, for low dollar, escapes some people. A $50 blemishes lower will also cost shipping and transfer fees, so that $50 lower ends up costing around $90 & on top of that you have to do the paperwork. With this build, all the government knows is that you bought some steel.




If it's a single shot, or even manually operated, do you need the buffer tube at all?
You're going to need the room to retract the BCG to extract the spent round and chamber a new one...  




But why do you need the tube itself?  Just let the BC slide out of the back of the receiver similar to a lever action.
Well, just be sure to catch it...  

 
Link Posted: 7/24/2014 1:25:00 PM EDT
[#39]
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Quoted:


But why do you need the tube itself?  Just let the BC slide out of the back of the receiver similar to a lever action.
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Quoted:
Quoted:
Quoted:
Quoted:
I guess the idea of building an off the books, single shot purpose built lower, for low dollar, escapes some people. A $50 blemishes lower will also cost shipping and transfer fees, so that $50 lower ends up costing around $90 & on top of that you have to do the paperwork. With this build, all the government knows is that you bought some steel.


If it's a single shot, or even manually operated, do you need the buffer tube at all?
You're going to need the room to retract the BCG to extract the spent round and chamber a new one...  


But why do you need the tube itself?  Just let the BC slide out of the back of the receiver similar to a lever action.


Got a point there.  It won't slide out all the way unless the receivers are open, but without the buffer spring to slow it down, it may crack the upper receiver by banging the gas key into it, since the OP is running it as an auto-eject single shot.  If he wasn't using gas to auto-eject, you could do w/out the buffer tube.
Link Posted: 7/24/2014 3:02:48 PM EDT
[#40]
Can't wait to see the finished project it is looking very cool and different
Link Posted: 7/24/2014 4:10:10 PM EDT
[#41]
Can't you just remove the gas tube from a standard AR pistol chambered in 300 blackout and call it good?  No gas tube = single shot pistol.
Link Posted: 7/24/2014 4:30:48 PM EDT
[#42]
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Quoted:
Can't you just remove the gas tube from a standard AR pistol chambered in 300 blackout and call it good?  No gas tube = single shot pistol.
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I could have...but that seemed boring

My goal is to eventually build another semi auto pistol lower so when its not being used to hunt, i can swap it to semi auto. I liked the idea of a normal functioning upper that way if i ever decide to get rid of it, the upper is complete.
Link Posted: 7/24/2014 4:36:18 PM EDT
[#43]
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Quoted:


I could have...but that seemed boring

My goal is to eventually build another semi auto pistol lower so when its not being used to hunt, i can swap it to semi auto. I liked the idea of a normal functioning upper that way if i ever decide to get rid of it, the upper is complete.
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Quoted:
Can't you just remove the gas tube from a standard AR pistol chambered in 300 blackout and call it good?  No gas tube = single shot pistol.


I could have...but that seemed boring

My goal is to eventually build another semi auto pistol lower so when its not being used to hunt, i can swap it to semi auto. I liked the idea of a normal functioning upper that way if i ever decide to get rid of it, the upper is complete.


I understand, just asking as I am moving to Illinois in the next month and I think I will try to hunt with 300 black as well.  Nice work by the way
Link Posted: 7/24/2014 4:36:36 PM EDT
[#44]
This is awesome! I've been wanting a Sterling SMG semi-auto, original barrel, in pistol config (ie, welded/inned stock ala those PPS's floating around). This build, to me, resembles that Sterling quite a bit. Though I'd prefer a cleaner handguard w/o all the rails attached.
Link Posted: 7/25/2014 10:45:50 AM EDT
[#45]
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Quoted:

Got a point there.  It won't slide out all the way unless the receivers are open, but without the buffer spring to slow it down, it may crack the upper receiver by banging the gas key into it, since the OP is running it as an auto-eject single shot.  If he wasn't using gas to auto-eject, you could do w/out the buffer tube.
View Quote


Got it - I was missing the auto eject part.



Link Posted: 7/25/2014 5:38:55 PM EDT
[#46]
First lesson learned today: A Mil Issue steel mag does NOT weld very easy. Now I just feel bad about cutting up a 30rd mag for nothing. I decided to go another way. I took a piece of scrap 1" square tubing and cut it up. I bent the top side in and used the mig and a grinder to build up the sides. Its not perfect but I can lay a round on it and let the bolt slam shut and it chambers. I also welded up the mag button hole and cleaned up the mag catch area better.

I kept going around trying to decide how much to clean up the lower. I finally decided that this is going to be a beat around deer gun not a safe queen. I sandblasted the lower and I am going to be ordering a finishing system as soon as I figure that out.

Just a few pics for today.

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140725_202101214_zps96muduc5.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140725_202019936_zpszze61koy.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140725_201932608_zpselxmjibl.jpg

http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140725_201941528_zpsic4fhdy2.jpg

And I picked up a cheap red dot. Im not sure how much I really like it but only time will tell.
http://i482.photobucket.com/albums/rr190/ben_cook_07/Mobile%20Uploads/IMG_20140725_201947986_zps53gng1fh.jpg
Link Posted: 7/25/2014 6:06:43 PM EDT
[#47]
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Quoted:
the weld engineer in me would change some of the butt, lap, and simple fillet joints to bevel and groove weld joints... then TIG it up. Not too sure if I would final machine it on a mill or not. As for finish... I'm a big fan of case coloring, but its hard to pull off at home without some pretty pricey equipment and controls (and experimentation, let along supporting your workpeice so it doesn't warp like crazy). either find a place close to you willing to do it for you, or do something else is my recommendation.

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I have a book from the 1800s on gunsmithing. Case coloring instructions are to polish the part as well as you can, then put it in a piece of pipe filled with bone meal & drop it in the fire until you are satisfied with the color.
It says the better the polish, the better the color.
Link Posted: 7/25/2014 10:08:22 PM EDT
[#48]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
First lesson learned today: A Mil Issue steel mag does NOT weld very easy. Now I just feel bad about cutting up a 30rd mag for nothing. I decided to go another way. I took a piece of scrap 1" square tubing and cut it up. I bent the top side in and used the mig and a grinder to build up the sides. Its not perfect but I can lay a round on it and let the bolt slam shut and it chambers. I also welded up the mag button hole and cleaned up the mag catch area better.

I kept going around trying to decide how much to clean up the lower. I finally decided that this is going to be a beat around deer gun not a safe queen. I sandblasted the lower and I am going to be ordering a finishing system as soon as I figure that out.
View Quote


Looking good.  A military issued STEEL magazine?  There's plenty of steel mags out there, but I'm not sure they were military issue.
Link Posted: 7/26/2014 5:39:39 AM EDT
[#49]
Maybe I screwed up. The mag I cut was one my brother in law brought back after he was discharged from the army. He sold me a couple mags. I assumed they were steel.
Link Posted: 7/26/2014 8:41:07 AM EDT
[#50]
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Quoted:
Maybe I screwed up. The mag I cut was one my brother in law brought back after he was discharged from the army. He sold me a couple mags. I assumed they were steel.
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USGI mags are aluminum. Might be why they don't weld so good.
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