User Panel
User Panel
User Panel
|
Posted: 6/29/2020 10:38:16 PM EDT
[#1]
Quoted: So I’m looking at a 20” barrel from DS arms I’d like 16.1 or honestly an SBR at like 14” I’m exclusively familiar with gas ports on ARs. When shortening an RPD barrel, what else needs to happen to ensure functionality? What about adding a suppressor? I've never seen one with a suppressor, so you might be the pioneer there. Depending on the length you want, you will have to turn down the barrel to move the gas block. I read that somewhere that you can open the gas port if needed, but that was for a postie. Gas block is adjustable so you have some wiggle room there. Piston will have to be shortened to fit. It's not that hard to do it terms of weapons mods supposedly, but I have not done it myself so I can't confirm. There should be a small gap between the end of the piston and the bottom of the gas block cylinder. The gas port is standard size but located closer to chamber end. The gas regulator is in position #2.  Attached File |
|
|
|
Posted: 6/30/2020 1:52:36 PM EDT
[#2]
Quote HistoryQuoted: Depending on the length you want.. < >..Piston will have to be shortened to fit. How short are we talking before modifying the piston? Could I go 16.1 and not need to play those games? How short is the one you linked? |
|
|
|
Posted: 6/30/2020 1:54:28 PM EDT
[#3]
@chase45 - you did a build thread right? Got a link?
@10mm_ @kuraki You guys know anything about going from a 20” barrel to something shorter? Even 16.1” is fine What else do I have to worry about? Moving the Bipod? |
|
|
|
Posted: 6/30/2020 2:06:29 PM EDT
[#4]
Quote HistoryQuoted: How short are we talking before modifying the piston? Could I go 16.1 and not need to play those games? How short is the one you linked? Quote HistoryQuoted: Quoted: Depending on the length you want.. < >..Piston will have to be shortened to fit. How short are we talking before modifying the piston? Could I go 16.1 and not need to play those games? How short is the one you linked? You only need to modify the piston if you're moving the gas block. I don't have my RPD on front of me so I can't measure where its placed normally. |
|
|
|
Posted: 6/30/2020 2:20:28 PM EDT
[#5]
Quote HistoryQuoted: @chase45 - you did a build thread right? Got a link? @10mm_ @kuraki You guys know anything about going from a 20" barrel to something shorter? Even 16.1" is fine What else do I have to worry about? Moving the Bipod? |
|
|
|
Posted: 6/30/2020 2:32:33 PM EDT
[#6]
Quote HistoryQuoted: I can measure when I get home but off the top of my head you don't need to move the gas block or shorten the piston for 16". So moving the front sight base, bipod, muzzle threads. Awesome, thanks! Blasphemy to have no front sight and do an optic rail on the receiver? |
|
|
|
Posted: 6/30/2020 2:36:03 PM EDT
[#7]
Quote HistoryQuoted: Awesome, thanks! Blasphemy to have no front sight and do an optic rail on the receiver? I just drilled and tapped my top cover and threw a C-More on it. It's as accurate/repeatable as any Krinkov dust cover and doesn't drift around like my rear sight  It would look weird to me without a front sight base. Moving that shouldn't really be a big challenge though to anyone with the knowledge and equipment to build one of these. |
|
|
|
Posted: 6/30/2020 2:51:34 PM EDT
[#8]
Quote HistoryQuoted: Well, I'm not sure what you mean by an optic rail on the receiver. You mean like an AK side rail? That would be problematic for a couple reasons, most notably clearance for the top cover, plus dealing with however it's attached protruding into where the carrier travels. I would imagine it's possible. I just drilled and tapped my top cover and threw a C-More on it. It's as accurate/repeatable as any Krinkov dust cover and doesn't drift around like my rear sight It would look weird to me without a front sight base. Moving that shouldn't really be a big challenge though to anyone with the knowledge and equipment to build one of these. Good stuff, thanks Any pictures you have would be appreciated |
|
|
|
Posted: 7/1/2020 9:08:39 AM EDT
[#9]
Quote HistoryQuoted: Well, I'm not sure what you mean by an optic rail on the receiver. You mean like an AK side rail? That would be problematic for a couple reasons, most notably clearance for the top cover, plus dealing with however it's attached protruding into where the carrier travels. I would imagine it's possible. I just drilled and tapped my top cover and threw a C-More on it. It's as accurate/repeatable as any Krinkov dust cover and doesn't drift around like my rear sight It would look weird to me without a front sight base. Moving that shouldn't really be a big challenge though to anyone with the knowledge and equipment to build one of these. So you’re saying the rest sight, on top of the dust cover, I easily comes off? I’m interested in a 1913 rail welded on the dust cover |
|
|
|
Posted: 7/1/2020 7:44:53 PM EDT
[#10]
I'm sure now you can do 16" without moving the gas block.
FSB and bipod are 2.5"  Attached FileGas block is 8" from muzzle. 21-5=16. 5+2.5=7.5 so less than 8"  Attached File Attached File |
|
|
|
Posted: 7/1/2020 7:49:46 PM EDT
[#11]
As for mounting an optic. This is a direct mount cmore just drilled and tapped 2 holes in the top cover ground the screws flat inside there's clearance between the cover and the feed actuator anyway. But you can see here a receiver mount on the left would be kind of a pita.
 Attached File Attached File Attached File |
|
|
|
Posted: 7/1/2020 9:26:51 PM EDT
[#12]
Quote HistoryQuoted: As for mounting an optic. This is a direct mount cmore just drilled and tapped 2 holes in the top cover ground the screws flat inside there's clearance between the cover and the feed actuator anyway. But you can see here a receiver mount on the left would be kind of a pita. https://www.AR15.Com/media/mediaFiles/125898/20200701_183510_jpg-1485555.JPG https://www.AR15.Com/media/mediaFiles/125898/20200701_183539_jpg-1485556.JPG https://www.AR15.Com/media/mediaFiles/125898/20200701_183703_jpg-1485557.JPG Thanks! Why not removing the rear sight entirely or buying a spare top cover to remove the rear sight and welding on a 1913 rail for an optic mount? Or spot welding on an optic rail where you Mounted the Cmore? |
|
|
|
Posted: 7/1/2020 9:32:56 PM EDT
[#13]
You could absolutely do that. I just had a direct mount cmore laying around.
I wouldn't put it where the rear sight is as I think even a low mount will start getting rather chin weld height, but where my cmore is? No problem. |
|
|
|
Posted: 7/1/2020 9:44:15 PM EDT
[#14]
Quote HistoryQuoted: You could absolutely do that. I just had a direct mount cmore laying around. I wouldn't put it where the rear sight is as I think even a low mount will start getting rather chin weld height, but where my cmore is? No problem. Do you think that spot where you’ve got the Cmore is more or less parallel to the bore? How much adjustment did you need on the sight? |
|
|
|
Posted: 7/1/2020 10:05:03 PM EDT
[#15]
Quote HistoryQuoted: Do you think that spot where you've got the Cmore is more or less parallel to the bore? How much adjustment did you need on the sight? It must be relatively parallel in elevation as I didn't require much adjusting for a 100 yard zero. |
|
|
|
Posted: 7/15/2020 8:45:20 AM EDT
[#16]
Quote History 16" barrel without moving gas block or shortening the piston. Bipod isn't mounted, as you will have to shorten the legs on it also, if you want it to close like factory. Thus, the SAW sack adapter. Shorten the bipod, wont sit with a drum in it like Kuraki's photo. Edit- the front sight is sitting over the barrel threads, this was just a mock-up, so it needs to move rearward. |
|
|
|
Posted: 7/15/2020 9:47:34 AM EDT
[#17]
Quote HistoryQuoted: https://www.AR15.Com/media/mediaFiles/259653/44326560_261642567869833_405038897458000-1504718.jpg 16" barrel without moving gas block or shortening the piston. Bipod isn't mounted, as you will have to shorten the legs on it also, if you want it to close like factory. Thus, the SAW sack adapter. Shorten the bipod, wont sit with a drum in it like Kuraki's photo. Edit- the front sight is sitting over the barrel threads, this was just a mock-up, so it needs to move rearward. Damn that’s hot |
|
|
|
Posted: 7/15/2020 10:03:54 AM EDT
[#18]
Quote HistoryQuoted: Damn that’s hot Will be if it ever gets finished and running. |
|
|
|
Posted: 7/15/2020 11:54:02 AM EDT
[#19]
Quote HistoryQuoted: Will be if it ever gets finished and running. Psssh, irrelevant. We don’t actually shoot these things |
|
|
|
Posted: 7/26/2020 12:48:22 PM EDT
[#20]
https://www.instagram.com/p/B1sP-8cgxNU/
14" pinned/welded to 16" |
|
|
|
Posted: 8/12/2020 12:27:56 PM EDT
[#21]
The dsa carbines are pinned and welded at (I believe) 14.5"
I know it's under 16" Latest versions have a FAL flash hider |
|
|
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
