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Posted: 2/24/2017 5:53:24 PM EDT
[#1]
Quote HistoryQuoted:
Answer this question and the Bumpsaw community would be indebted to you! We have all pondered adding a home brewed bumpfire stock to an RPD... the trigger is what we all have an issue with.... @SkilletsUSMC says he wants to buy a kit and give her a swing though! - Clint If I could figure out how DSA gets a buffer extension in there and allows the spring to cooperate I don't see it being an impossible task. It maybe ugly as all get out. But it should work. That being said I have never felt a semi auto trigger of a RPD, so there maybe too much travel or something that would make it a pain in the ass. |
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Posted: 2/24/2017 5:53:50 PM EDT
[#2]
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Posted: 2/24/2017 5:58:22 PM EDT
[#3]
I guarantee I could get an RPD to bump EASY. I would build the stock out of wood and use the grip from a Bumpski.
Someone want to send me theirs? 
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Posted: 2/24/2017 5:59:56 PM EDT
[#4]
Quote HistoryQuoted:
I guarantee I could get an RPD to bump EASY. I would build the stock out of wood and use the grip from a Bumpski. Someone want to send me theirs? Goddamn that thing is almost $500. But yeah looks like you could make it work with one of those with some modifications |
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Posted: 3/2/2017 11:12:01 AM EDT
[#5]
Still waiting but lets bump this thread a bit
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Posted: 3/2/2017 11:13:41 AM EDT
[#6]
SOT 02/07 RPDs are more funner
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Posted: 3/2/2017 11:16:38 AM EDT
[#7]
Quote HistoryQuoted:
SOT 02/07 RPDs are more funner Well yeah. I wish I could 
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Posted: 3/2/2017 11:53:30 AM EDT
[#8]
Quote HistoryQuoted:
Still waiting but lets bump this thread a bit <a href="http://i.imgur.com/FWjwAyLh.jpg" target="_blank">http://i.imgur.com/FWjwAyLh.jpg</a> are those rounds indexed on the belt correctly? Looks like the head isn't snapped in. Also, Mcdonald's. bleh |
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Posted: 3/2/2017 11:55:13 AM EDT
[#9]
Quote HistoryQuoted:
are those rounds indexed on the belt correctly? Looks like the head isn't snapped in. Also, Mcdonald's. bleh I believe so. It was just thrown in for a photo op so it could have been not set up right. Its also not complete The mcdonalds... I don't eat there to be clear. But my lady friend fancies cokes from there. She cant have a normal coke, has to be a fucking mcdonalds coke 
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Posted: 3/2/2017 12:10:08 PM EDT
[#10]
Quote HistoryQuoted:
I believe so. It was just thrown in for a photo op so it could have been not set up right. Its also not complete The mcdonalds... I don't eat there to be clear. But my lady friend fancies cokes from there. She cant have a normal coke, has to be a fucking mcdonalds coke <img src="http://www.ar15.com/images/smilies/smiley_noSmile.gif" /> Quote HistoryQuoted:
<strong>Quoted:</strong>
are those rounds indexed on the belt correctly? Looks like the head isn't snapped in. Also, Mcdonald's. bleh I believe so. It was just thrown in for a photo op so it could have been not set up right. Its also not complete The mcdonalds... I don't eat there to be clear. But my lady friend fancies cokes from there. She cant have a normal coke, has to be a fucking mcdonalds coke <img src="http://www.ar15.com/images/smilies/smiley_noSmile.gif" /> I do like the RPD riding shotgun in the VW tho. |
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Posted: 3/3/2017 12:02:05 PM EDT
[#11]
Quote HistoryQuoted:
I do like the RPD riding shotgun in the VW tho. RPD riding in a Subaru you mean 
If I get some time this weekend I may start working on figuring out how to get the barrel sized down a little. Im thinking about chucking it in a drill press and using emory cloth to get the OD slightly smaller. |
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Posted: 3/3/2017 12:19:52 PM EDT
[#12]
Quote HistoryQuoted:
RPD riding in a Subaru you mean <img src="http://www.ar15.com/images/smilies/smiley_smartass.gif" /> If I get some time this weekend I may start working on figuring out how to get the barrel sized down a little. Im thinking about chucking it in a drill press and using emory cloth to get the OD slightly smaller. Quote HistoryQuoted:
<strong>Quoted:</strong>
I do like the RPD riding shotgun in the VW tho. RPD riding in a Subaru you mean <img src="http://www.ar15.com/images/smilies/smiley_smartass.gif" /> If I get some time this weekend I may start working on figuring out how to get the barrel sized down a little. Im thinking about chucking it in a drill press and using emory cloth to get the OD slightly smaller. It's ok if you drive a VW Bug. We're not judging. |
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Posted: 3/3/2017 12:53:04 PM EDT
[#13]
Quote HistoryQuoted:
It's ok if you drive a VW Bug. We're not judging. 
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Posted: 3/3/2017 1:35:18 PM EDT
[#14]
Quote HistoryQuoted:
It's ok if you drive a VW Bug. We're not judging. Shut it We would judge the fuck out of that
What's the purpose of a smaller OD on the barrel? |
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Posted: 3/3/2017 2:08:59 PM EDT
[#15]
Quote HistoryQuoted:
Shut it We would judge the fuck out of that
What's the purpose of a smaller OD on the barrel? As of right now the OD on the barrel is very slightly larger than the ID of the receiver. Assuming I measured correctly anyways. I had a few beers before I did the measuring with a caliper and that was awhile ago. The proper solution is to take a few thousands off with a lathe, but guess what I don't have .
The solution in my mind is to chuck the barrel into a drill press and use some fine abrasive material to remove a few thousands, but Im still thinking on what Im going to do exactly to correct the sizing issue |
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Posted: 3/3/2017 7:10:39 PM EDT
[#16]
Dumb question but if it's super close couldn't you just stick it in a bucked of dry ice let it cool and shrink ever so slightly then ram her home? Cold shouldn't affect any tempering like heating up the receiver to expand it would I'd imagine. But it could be a dumbass suggestion either way just speculating.
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Posted: 3/6/2017 10:29:01 AM EDT
[#17]
Quote HistoryQuoted:
Dumb question but if it's super close couldn't you just stick it in a bucked of dry ice let it cool and shrink ever so slightly then ram her home? Cold shouldn't affect any tempering like heating up the receiver to expand it would I'd imagine. But it could be a dumbass suggestion either way just speculating. Ive considered that as well. Hopefully the machine work on the bolt carrier and lower wont take too long and Ill have the parts back to where I have to figure out a solution |
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Posted: 3/6/2017 2:51:10 PM EDT
[#18]
I chill my press fit AK barrels in the freezer before pressing if they're extra tight. It buys you a little allowance, but it can get interesting if they warm up before you wanted them to.
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Posted: 3/6/2017 8:01:36 PM EDT
[#19]
Anti seize, proper dimension and a press will make it simple.
Did you get Headspace Gauges yet? |
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Posted: 3/7/2017 10:53:11 AM EDT
[#20]
Quote HistoryQuoted:
Anti seize, proper dimension and a press will make it simple. Did you get Headspace Gauges yet? My buddy has some that hes going to let me borrow. I need to take the time and visualize how Im going to set up the receiver in the press at some point. |
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Posted: 3/7/2017 4:44:57 PM EDT
[#21]
You're really making me want to get mine rescued from the back burner. I've got a really nice Polish kit from back when they came with unmolested barrels.
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Posted: 3/7/2017 4:45:48 PM EDT
[#22]
Quote HistoryQuoted:
You're really making me want to get mine rescued from the back burner. I've got a really nice Polish kit from back when they came with unmolested barrels. Lucky Those go for big money with a intact barrel |
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Posted: 3/13/2017 2:41:41 PM EDT
[#23]
Hopefully those parts will get done being machined this week because Im ready to do something with this build
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Posted: 3/16/2017 4:49:50 PM EDT
[#24]
I missed project guns call today. But VM says its done.
I maybe able to do a little work next week. Next weekend Ill be in vegas however. This build will be done soon 
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Posted: 3/20/2017 8:47:12 AM EDT
[#25]
Parts should be here by Wednesday or so I was told.
I remeasured the barrel stub that goes in the receiver and also the DSA receiver. They seem to measure out to about the same measurement. Should make for a tight fit but from what I am reading on my research I shouldn't take down the barrel any. Well see how it goes this week |
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Posted: 3/20/2017 9:24:12 AM EDT
[#26]
You have cool shit, OP.
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Posted: 3/20/2017 9:30:46 AM EDT
[#27]
Quote HistoryQuoted:
You have cool shit, OP.
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Posted: 3/20/2017 9:35:29 AM EDT
[#28]
Quote HistoryQuoted:
No faith |
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Posted: 3/20/2017 9:43:10 AM EDT
[#29]
Quote HistoryQuoted:
In for the quality build and entertainment Chase! Assuming that goes well all I have to do then is press barrel accessories on, drill gas port and it should be ready to roll. It sounds easy
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Posted: 3/20/2017 10:00:06 AM EDT
[#30]
Quote HistoryQuoted:
As soon as I get the carrier back I can start pressing the barrel to headspace. Then drill and pin barrel. Assuming that goes well all I have to do then is press barrel accessories on, drill gas port and it should be ready to roll. It sounds easy Whats the worse that can happen?
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Posted: 3/20/2017 10:17:50 AM EDT
[#31]
Quote HistoryQuoted:
Whats the worse that can happen?
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Posted: 3/21/2017 4:47:23 PM EDT
[#32]
Getting the gauges from my buddy tomorrow, parts should also be in tomorrow. Im going to try and go ahead and install the barrel and headspace.
I did just realize I forgot to get a barrel pin. I found a 8mm pin used for the master links on tracks at my work. Im considering just chopping that down and drilling the receiver 5/16. That should leave .0025" for the interference fit between 5/16 and 8mm. Once that's done I just have to drill and pin the rest of the accessories and she should be done. I saved those pins and hopefully I can find a drill bit that will work to leave them tight enough Im going to try and have this thing together by the weekend |
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Posted: 3/21/2017 5:21:20 PM EDT
[#33]
Quote HistoryQuoted:
Getting the gauges from my buddy tomorrow, parts should also be in tomorrow. Im going to try and go ahead and install the barrel and headspace. I did just realize I forgot to get a barrel pin. I found a 8mm pin used for the master links on tracks at my work. Im considering just chopping that down and drilling the receiver 5/16. That should leave .0025" for the interference fit between 5/16 and 8mm. Once that's done I just have to drill and pin the rest of the accessories and she should be done. I saved those pins and hopefully I can find a drill bit that will work to leave them tight enough Im going to try and have this thing together by the weekend
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Posted: 3/21/2017 5:23:25 PM EDT
[#34]
Quote HistoryQuoted:
Im gunna get this thing together one way or another
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Posted: 3/21/2017 5:24:29 PM EDT
[#35]
Quote HistoryQuoted:
Im gunna get this thing together one way or another |
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Posted: 3/21/2017 5:26:36 PM EDT
[#36]
Quote HistoryQuoted:
Im gunna get this thing together one way or another |
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Posted: 3/21/2017 5:33:02 PM EDT
[#37]
Quote HistoryQuoted:
Don't be a pussy That's probably the smarter move assuming I can find them. I then can just make a barrel pin from one of them. Again assuming I can find some locally. If not Ill do this right and order a AK barrel pin |
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Posted: 3/21/2017 5:36:55 PM EDT
[#38]
Quote HistoryQuoted:
looking forward to seeing a video of this thing in action! |
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Posted: 3/21/2017 6:55:52 PM EDT
[#39]
I better just wait and order the right drill bits and a barrel pin instead of half assing it |
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Posted: 3/21/2017 6:58:38 PM EDT
[#40]
Quote HistoryQuoted:
I better just wait and order the right drill bits and a barrel pin instead of half assing it |
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Posted: 3/22/2017 11:03:42 AM EDT
[#41]
If it's anything like pinning an AK barrel, you'll want a ream to get the hole the right size and smooth. That really helps with these press fit components.
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Posted: 3/22/2017 1:28:36 PM EDT
[#42]
Alright I saw a lot of conflicting info on the barrel pin size
2 rivers said to use a 4mm pin Ive also seen it suggested to use a oversized ak pin. Well the 4mm seemed too small and the ak pin too big when I put a caliper next to the chamfer that's started in my DSA receiver. So I finally just asked DSA and they recommend to use a 3/16th dowell pin in their receivers. Well I took a short lunch and chanced it at a local hardware store. I scored 3/16th dowell pins and a number 14 and 13 sized drill which should give it a few thousands undersized for the dowell pin to be pressed in. Im feeling pretty good about getting this guy together tonight
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Posted: 3/22/2017 1:44:20 PM EDT
[#43]
Do it up Chase, you got this!!
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Posted: 3/22/2017 3:27:34 PM EDT
[#44]
Quote HistoryQuoted:
Do it up Chase, you got this!! Gunna be a long 2 hours and 30 minutes |
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Posted: 3/22/2017 3:39:01 PM EDT
[#45]
Awesomeness!
Even though I love all things MacVSog, I wouldn't chop off the barrel. 
Maybe keep it VC compliant? ETA; I love the FAL! |
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Posted: 3/23/2017 10:38:46 AM EDT
[#46]
Well.
I got everything working good. Got the carrier to stop binding. Everything was going pretty smoothly. I got the barrel in about 3/4 of the way. Then I saw a dreaded torque of the receiver while under load from the press. So the good news I guess is that I bent back the receiver most the way. The bad news is Im likely going to need a new receiver. Its got a slight S curve to the back half of the receiver. This is my own doing and simply not being smart with how I set up the receiver and the press. Im going to try a bit more to salvage this receiver first as all I need to do is get the rails straight and it should work. It didn't damage the front half of the receiver where all the critical dimensions are for the locking flaps. Well see. Pretty disappointed in myself 
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Posted: 3/23/2017 11:41:49 AM EDT
[#47]
Damn that sucks bud!
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Posted: 3/23/2017 11:53:49 AM EDT
[#48]
You take on ambitious projects and bring them to fruition, and we all get to benefit from watching. Sometimes you choose well, sometimes badly. This is an expensive lesson, but those go with any ambitious project. Kudos to you for carrying on undeterred; some would have bandsawed the brand-new receiver into 3 parts and posted pics.
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Posted: 3/23/2017 12:20:16 PM EDT
[#49]
Quote HistoryQuoted:
You take on ambitious projects and bring them to fruition, and we all get to benefit from watching. Sometimes you choose well, sometimes badly. This is an expensive lesson, but those go with any ambitious project. Kudos to you for carrying on undeterred; some would have bandsawed the brand-new receiver into 3 parts and posted pics. |
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Posted: 3/23/2017 12:34:09 PM EDT
[#50]
Im giving it a honest shot at salvaging this guy
Im about there with it. Im using a bolt and some nuts to try and expand it. Well see. Hate to get my hopes up too much 
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