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Posted: 7/18/2014 6:17:43 PM EDT
[#1]
Why?
Google around for straight pull ar15s or maybe some of our British members can tell you more about them. |
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Posted: 7/19/2014 5:56:36 AM EDT
[#2]
Yes! I am basically building a straight pull AR. The uppers I looked at were in the $300-400 range. I plan to do this for <$100.
R |
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Posted: 7/19/2014 7:41:34 AM EDT
[#3]
Drilling and tapping the bolt carrier is extremely difficult. They are typically extremely hard I know I did it. I have 40 years experience and wondered if I bit off more than I could chew, so be forewarned. Unlike you I run this with a functioning gas system I just have to make sure I keep my left thumb out of the way.
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Posted: 7/19/2014 7:50:07 AM EDT
[#4]
Quote HistoryQuoted:
Drilling and tapping the bolt carrier is extremely difficult. They are typically extremely hard I know I did it. I have 40 years experience and wondered if I bit off more than I could chew, so be forewarned. Unlike you I run this with a functioning gas system I just have to make sure I keep my left thumb out of the way. <a href="http://s146.photobucket.com/user/908ssp/media/machinework/_1012511_zps52a6eccc.jpg.html" target="_blank">http://i146.photobucket.com/albums/r245/908ssp/machinework/_1012511_zps52a6eccc.jpg</a> That is a beautiful weapon! May I ask how long the slot on the left side is? Also your handle looks smaller than those I have seen. I like it! Any chance you have a close up of the handle? So far so good. https://lh5.googleusercontent.com/-v9p_iwUrUb8/U8nCK3vz4fI/AAAAAAAAGYA/7saoopv_bds/w1358-h768-no/14+-+1 I decided to place the hole 15 mm to the rear of the carrier face. R |
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Posted: 7/26/2014 10:03:19 AM EDT
[#5]
So I decided to try it without annealing the BC. Based on the cutting of the carbide end mill and the HSS tap this steel is primarily case hardened. The inner steel was hard but not that hard. I was able to drill it with carbide and tap it with HSS.
Tapping was tedious and I was afraid I would break off the tap the entire time. Interestingly the TiN coated tap did worse (binding) than the plain HSS. I did use a tapping block; not shown. https://lh4.googleusercontent.com/-FGFwVs565QY/U9PmLq3bHHI/AAAAAAAAGbk/zh3RWhaGBxs/w1566-h886-no/14+-+8 https://lh6.googleusercontent.com/-aah8zAmnezo/U9PmLlTvVeI/AAAAAAAAGbk/Z_AUicbQOGg/w1566-h886-no/14+-+7 https://lh4.googleusercontent.com/-4Swqz8J3WMw/U9PmLhQTkxI/AAAAAAAAGbk/s-7H43bEmmI/w1566-h886-no/14+-+6 https://lh6.googleusercontent.com/-J7Grbr9oKEk/U9PmLvmP2_I/AAAAAAAAGbk/g748MsMnpK8/w1566-h886-no/14+-+5 Machining the slot in the upper receiver for the handle. It's 3/8 wide and 10cm long. (end mill Imperial, Mill Metric) https://lh3.googleusercontent.com/-5NROdrTYVvY/U9PmLjZ4JTI/AAAAAAAAGbk/CrOQfp4HqD4/w1566-h886-no/14+-+4 https://lh4.googleusercontent.com/-LvbZ5z43z8Y/U9PmLoHDvdI/AAAAAAAAGbk/RIHCvqLg8-0/w1566-h886-no/14+-+2 https://lh3.googleusercontent.com/-35xnnWCPlbM/U9PmLnSy2EI/AAAAAAAAGbk/NBGz5iNZKpI/w1566-h886-no/14+-+1 Planning on a Phase 5 bolt catch. I may need to modify that if it interferes with the bolt handle. Does any body see any problems with this plan? R |
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Posted: 7/26/2014 5:43:06 PM EDT
[#6]
Wow.. thats looking good.. great work!
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Posted: 7/26/2014 5:48:36 PM EDT
[#7]
Quote HistoryQuoted:
Why? I would like to know, too. |
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Posted: 7/26/2014 7:22:45 PM EDT
[#8]
Quote HistoryQuoted: I would like to know, too. Quote HistoryQuoted: Quoted: Why? I would like to know, too. So you don't have to take it out of your shoulder to rack the bolt. |
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Posted: 7/26/2014 9:14:17 PM EDT
[#9]
I'm not sure what the why refers to?
Bolt handle on the left is so you can maintain your firing position. Lack of a gas system is so it is legal in Maryland. R |
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Posted: 7/27/2014 5:42:38 AM EDT
[#10]
Quote HistoryQuoted:
So I decided to try it without annealing the BC. Based on the cutting of the carbide end mill and the HSS tap this steel is primarily case hardened. The inner steel was hard but not that hard. I was able to drill it with carbide and tap it with HSS. Tapping was tedious and I was afraid I would break off the tap the entire time. Interestingly the TiN coated tap did worse (binding) than the plain HSS. I did use a tapping block; not shown. https://lh4.googleusercontent.com/-FGFwVs565QY/U9PmLq3bHHI/AAAAAAAAGbk/zh3RWhaGBxs/w1566-h886-no/14+-+8 https://lh6.googleusercontent.com/-aah8zAmnezo/U9PmLlTvVeI/AAAAAAAAGbk/Z_AUicbQOGg/w1566-h886-no/14+-+7 https://lh4.googleusercontent.com/-4Swqz8J3WMw/U9PmLhQTkxI/AAAAAAAAGbk/s-7H43bEmmI/w1566-h886-no/14+-+6 https://lh6.googleusercontent.com/-J7Grbr9oKEk/U9PmLvmP2_I/AAAAAAAAGbk/g748MsMnpK8/w1566-h886-no/14+-+5 Machining the slot in the upper receiver for the handle. It's 3/8 wide and 10cm long. (end mill Imperial, Mill Metric) https://lh3.googleusercontent.com/-5NROdrTYVvY/U9PmLjZ4JTI/AAAAAAAAGbk/CrOQfp4HqD4/w1566-h886-no/14+-+4 https://lh4.googleusercontent.com/-LvbZ5z43z8Y/U9PmLoHDvdI/AAAAAAAAGbk/RIHCvqLg8-0/w1566-h886-no/14+-+2 https://lh3.googleusercontent.com/-35xnnWCPlbM/U9PmLnSy2EI/AAAAAAAAGbk/NBGz5iNZKpI/w1566-h886-no/14+-+1 Planning on a Phase 5 bolt catch. I may need to modify that if it interferes with the bolt handle. Does any body see any problems with this plan? R Nice you did it. you see what I mean about tapping the bolt carrier. I rotated my bolt handle up slightly. I used a black grade 8 bolt they are stronger than stainless but not as brittle as grade 12. The handle is titanium and is bolted tight to the carrier which helps reduce angular loads on the screw holding the handle on. |
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Posted: 7/27/2014 6:03:38 AM EDT
[#11]
Titanium handle is a great idea, thanks. Mine is 304 for now. I thought about rotating the handle up a little. It was technically easier to machine it at 90 deg. and I still preserved the contact surface for the left rail on the BCG. If I didn't know about the Phase 5 bolt release I would have rotated the handle higher.
This one (EBRV2-SC) barely sticks up: http://phase5wsi.com/images/thumbnails/0/984/471/EBRV2-SC_7202.jpg A few more: https://lh6.googleusercontent.com/LAENc2tSdNz0JU-lHAJMB4FxkCqc0QkyGXn7PpzutPM=w1566-h886-no https://lh3.googleusercontent.com/-UtNpY5C0-U0/U9QYUBoJhPI/AAAAAAAAGbc/zAiYHyayk4I/w1566-h886-no/14+-+4 https://lh3.googleusercontent.com/-9rm0cAPxVjU/U9QYUBEnp9I/AAAAAAAAGbc/xViHSjogU8Y/w1566-h886-no/14+-+1 R |
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Posted: 7/27/2014 8:24:30 AM EDT
[#12]
Awesome work. You have some talent
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Posted: 7/27/2014 3:52:12 PM EDT
[#13]
Quote HistoryQuoted:
Lack of a gas system is so it is legal in Maryland. R You can build an HBAR and keep it semi-auto. |
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Posted: 7/27/2014 6:29:33 PM EDT
[#14]
As you may know that law is very hard to interpret.
You may be familiar with this: http://www.mdshooters.com/showthread.php?t=109281&highlight=sb281+faq Not sure how the judge at my arraignment would define Colt Sporter H-BAR R EDIT: And I love this: https://dl.dropbox.com/u/25040761/MD_SB0281_28FEB13.jpg |
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Posted: 7/27/2014 7:26:34 PM EDT
[#15]
Quote HistoryQuoted:
As you may know that law is very hard to interpret. You may be familiar with this: http://www.mdshooters.com/showthread.php?t=109281&highlight=sb281+faq Not sure how the judge at my arraignment would define Colt Sporter H-BAR R EDIT: And I love this: https://dl.dropbox.com/u/25040761/MD_SB0281_28FEB13.jpg That sucks 12 ways from friday. Our flow chart simply says "You're in Texas, Enjoy!" |
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Posted: 7/27/2014 9:00:36 PM EDT
[#16]
never mind
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Posted: 7/31/2014 6:56:22 AM EDT
[#17]
Final Pics:
https://lh6.googleusercontent.com/-cUsG12tP_2A/U9mWBpktUXI/AAAAAAAAGcQ/ACzRwgZAXT4/w1566-h886-no/14%2B-%2B1 https://lh5.googleusercontent.com/-60lI1wkKkqQ/U9mWBpBwkOI/AAAAAAAAGcY/EyrZNWFk5I8/w1566-h886-no/14%2B-%2B2 I also machined a stainless ring to replace the gas block so the hole in the barrel is covered (not shown.) I can convert back to semi-auto in about 5 min. Bolt release didn't come in yet. Thanks for watching. R |
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Posted: 8/6/2014 6:22:36 AM EDT
[#18]
Here's a side charger conversion I did. Cut the charging handle slot in a DPMS LoPro upper and fabricated a filler block for the stock charging handle. Used a Young carrier.
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Posted: 8/6/2014 6:45:25 AM EDT
[#19]
I've been wanting to do this but inactive like the standard AR charging handle. Not that the left side charger flying back and forth is really that dangerous, just thought it would be an improved design. I probably won't get around to it any time soon though.
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Posted: 8/6/2014 3:46:23 PM EDT
[#20]
i cut a charging handle in 2, filled in the channel and tapped it.
threaded a handle on it, cut a slot in the upper and i have a non reciprocating left side charger. 
granted, this a dedicated .22LR on a polymer upper, but the concept's applicable. may have to start farther forward for longer travel, but that's details. i was just winging it here, it turned out ok. |
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Posted: 8/6/2014 4:01:48 PM EDT
[#21]
Quote HistoryQuoted:
As you may know that law is very hard to interpret. You may be familiar with this: http://www.mdshooters.com/showthread.php?t=109281&highlight=sb281+faq Not sure how the judge at my arraignment would define Colt Sporter H-BAR R EDIT: And I love this: https://dl.dropbox.com/u/25040761/MD_SB0281_28FEB13.jpg So accoding to this I could still own an AR with a pistol grip and detachable mag, as long as it had a fixed stock, and no FH, or bayonet lug, and has a barrel longer than 16" and a OAL of greater than 30" |
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Posted: 8/6/2014 5:16:41 PM EDT
[#22]
Quote HistoryQuoted:
i cut a charging handle in 2, filled in the channel and tapped it. threaded a handle on it, cut a slot in the upper and i have a non reciprocating left side charger. <a href="http://s367.photobucket.com/user/hotdogit250/media/ulw22sdiechager3_zps109a5caa.jpg.html" target="_blank">http://i367.photobucket.com/albums/oo119/hotdogit250/ulw22sdiechager3_zps109a5caa.jpg</a> granted, this a dedicated .22LR on a polymer upper, but the concept's applicable. may have to start farther forward for longer travel, but that's details. i was just winging it here, it turned out ok. I LIKE IT!! |
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Posted: 8/6/2014 7:17:49 PM EDT
[#23]
I really like the work the OP is doing.
Since we are sharing charging handle mods let me add one more. I use a tall upper receiver and made everything else. The charging handle is way forward on the fore stock. You can see bit of the titanium tuning running in the upper receiver it runs all the way to the front of the fore stock charging handle carrier. The aluminum piece that actually engages the bolt come thru a slot cut from the under side of the upper receiver and is pushed by a carbon bar, the handle is the large silver thing folded flat. Now this is a AR bullpup conversion I built from scratch but the charging handle could easily be used on a normal AR as well. 
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Posted: 8/7/2014 6:21:05 AM EDT
[#24]
Quote HistoryQuoted:
So accoding to this I could still own an AR with a pistol grip and detachable mag, as long as it had a fixed stock, and no FH, or bayonet lug, and has a barrel longer than 16" and a OAL of greater than 30" Quote HistoryQuoted:
Quoted:
As you may know that law is very hard to interpret. You may be familiar with this: http://www.mdshooters.com/showthread.php?t=109281&highlight=sb281+faq Not sure how the judge at my arraignment would define Colt Sporter H-BAR R EDIT: And I love this: https://dl.dropbox.com/u/25040761/MD_SB0281_28FEB13.jpg So accoding to this I could still own an AR with a pistol grip and detachable mag, as long as it had a fixed stock, and no FH, or bayonet lug, and has a barrel longer than 16" and a OAL of greater than 30" Well...all AR 15s brought into MD after October 2013 are specifically banned by name. If it's not semiautomatic it's not an AR15. There is some question about whether HBARs are legal. MSP seem to be saying yes but the law specifically mentioned only the Colt Sporter. R |
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Posted: 8/7/2014 6:41:44 AM EDT
[#25]
Quote HistoryQuoted:
i cut a charging handle in 2, filled in the channel and tapped it. threaded a handle on it, cut a slot in the upper and i have a non reciprocating left side charger. <a href="http://s367.photobucket.com/user/hotdogit250/media/ulw22sdiechager3_zps109a5caa.jpg.html" target="_blank">http://i367.photobucket.com/albums/oo119/hotdogit250/ulw22sdiechager3_zps109a5caa.jpg</a> granted, this a dedicated .22LR on a polymer upper, but the concept's applicable. may have to start farther forward for longer travel, but that's details. i was just winging it here, it turned out ok. Really cool idea. The 223 or 308 would need a longer slot as you indicated. Would that weaken the rail? How did you attach the handle to the rather flimsy shaft of the charging handle? R |
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Posted: 8/7/2014 4:43:42 PM EDT
[#26]
i used a 2 part epoxy you knead into one ("Kwik Steel") to fill in the channel, then drilled and tapped through being sure to get the other side.
i wouldn't pull a car with it, and it might not stand up to a buffer spring (.22= no buffer), but that's what i did. blasting and tig ing that handle would be problematic (melting away) i also didn't consider things clamped on hanging over the rail, almost bit me. also longer stroke might mean the cut off end coming out the back, might be a problem for close up shooters (nose to the carry handle bunch) |
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