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Posted: 1/7/2025 4:57:28 PM EDT
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About 10 years ago there were 5-8 systems out there, but with Adams Arms folding (I know they will likely come back at some point, but at least for now) is Superlative Arms the last drop in gas piston system on the market? Sven Manticore Arms |
Advanced Fighting Gear for the AR, AK, AUG, Tavor, and Scorpion EVO! www.manticorearms.com
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Originally Posted By hoody2shoez: Simplicity Weight Reliability Adjustability Rail compatibility I take it you have one (or more) installed on a gun and like it? Sven Manticore Arms (The thread was really intended to see if any other drop in systems still existed, but maybe this is the reason all the others fell by the wayside!) |
Advanced Fighting Gear for the AR, AK, AUG, Tavor, and Scorpion EVO! www.manticorearms.com
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Originally Posted By Manticore_Arms: I take it you have one (or more) installed on a gun and like it? Sven Manticore Arms (The thread was really intended to see if any other drop in systems still existed, but maybe this is the reason all the others fell by the wayside!) I have experience with a few manufacturers. Yes that's why they seem to be the last man standing. |
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Originally Posted By hoody2shoez: Simplicity Weight Reliability Adjustability Rail compatibility Agreed, but the one thing they have going against them (and it's a VERY small thing for almost everyone) is compatability with .300BLK. Superlative is a little less forgiving on their dimensions for the gas port according to their own literature. That's not normally too much of an issue, but for some reason the gas port location on pistol length gas systems isn't as consistent. When I talked with Superlative about converting my .300 to piston, they strongly recommended against it unless I could confirm that the gas port was exactly where they needed it. And, it wasn't. IT's a Faxon Match barrel and the gas port is JUST out of spec for Superlative. That's a bummer. The Adams Arms pistol system works fine on the .300BLK, fyi. But we all know where they're at now. |
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Originally Posted By mobiushky: Agreed, but the one thing they have going against them (and it's a VERY small thing for almost everyone) is compatability with .300BLK. Superlative is a little less forgiving on their dimensions for the gas port according to their own literature. That's not normally too much of an issue, but for some reason the gas port location on pistol length gas systems isn't as consistent. When I talked with Superlative about converting my .300 to piston, they strongly recommended against it unless I could confirm that the gas port was exactly where they needed it. And, it wasn't. IT's a Faxon Match barrel and the gas port is JUST out of spec for Superlative. That's a bummer. The Adams Arms pistol system works fine on the .300BLK, fyi. But we all know where they're at now. Originally Posted By mobiushky: Originally Posted By hoody2shoez: Simplicity Weight Reliability Adjustability Rail compatibility Agreed, but the one thing they have going against them (and it's a VERY small thing for almost everyone) is compatability with .300BLK. Superlative is a little less forgiving on their dimensions for the gas port according to their own literature. That's not normally too much of an issue, but for some reason the gas port location on pistol length gas systems isn't as consistent. When I talked with Superlative about converting my .300 to piston, they strongly recommended against it unless I could confirm that the gas port was exactly where they needed it. And, it wasn't. IT's a Faxon Match barrel and the gas port is JUST out of spec for Superlative. That's a bummer. The Adams Arms pistol system works fine on the .300BLK, fyi. But we all know where they're at now. An easy solution for that would just have an oversize starter hole or slot on the underside of their gas block which would allow for gas flow from an inconsistent gas port location into the actual gas port hole in their gas block. Sven Manticore Arms |
Advanced Fighting Gear for the AR, AK, AUG, Tavor, and Scorpion EVO! www.manticorearms.com
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Originally Posted By caduckgunner: I have an Osprey which runs good, not sure why Franklin bought them and killed them off. I just ordered a Superlative rifle length for a IAR type build I am working on. Franklin was planning on re-introducing the Osprey Piston but from my understanding they are just too busy making binary triggers too really have time to do anything with it. That and the fact the aftermarket piston kits seem to be kind of a dead market at this point (Dedicated piston uppers and or/guns seem to be the new hotness, and with the fact that as far as I can tell Superlative Arms is the only one still making aftermarket piston kits, hence this thread!) Sven Manticore Arms |
Advanced Fighting Gear for the AR, AK, AUG, Tavor, and Scorpion EVO! www.manticorearms.com
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Originally Posted By hoody2shoez: Simplicity Weight Reliability Adjustability Rail compatibility I think how limited the rail compatibility is with the Adam's Arms kits hurt them. If you're assembling it youself, you probably want the freedom to pick whatever parts you want. I'm happy with my Adam's Arms kits, but I'm interested in Superlative Arms mostly for more rail options. |
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Originally Posted By CHC3: I think how limited the rail compatibility is with the Adam's Arms kits hurt them. If you're assembling it youself, you probably want the freedom to pick whatever parts you want. I'm happy with my Adam's Arms kits, but I'm interested in Superlative Arms mostly for more rail options. They actually did pretty well with the low profile gasblock, it was a lot more compatible. But you still had to have the extra space at the top of the rail for it to work, which not all forends have. I've got a .300BLK pistol that was AA piston until I swapped to a 10.5" barrel and went with a new carbon fiber forend that doesn't have the added space at the top for the top rail. That meant having to convert it to DI to use it. I'm torn between leaving the carbon fiber or just getting a forend with that top rail space.... |
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Originally Posted By Manticore_Arms: About 10 years ago there were 5-8 systems out there, but with Adams Arms folding (I know they will likely come back at some point, but at least for now) is Superlative Arms the last drop in gas piston system on the market? I hope so. I just bought one. |
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Originally Posted By hoody2shoez: Simplicity Weight Reliability Adjustability Rail compatibility 100% agreed. Mine was a breeze to setup, and after spending the time to fine tune it, it is by far my least gassy and softest shooting rifle. Suppresses really well too. I've also not actually had a single malfunction, failure, or part breakage with it yet. It's good enough that I bought spare parts to put in storage for down the road. The only other comment I'd add to the list is quality. The parts are incredibly well made and the machining / finishing is top notch. |
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It looks like Adams Arms is back. https://youtu.be/BO-kOYphGOg?si=onK9vgQ8YT161y2l |
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Originally Posted By ClickClickBoom1: It looks like Adams Arms is back. https://youtu.be/BO-kOYphGOg?si=onK9vgQ8YT161y2l Yup, talked to them at SHOT Show, but it is going to be a bit before they are up and running again. Sven Manticore Arms |
Advanced Fighting Gear for the AR, AK, AUG, Tavor, and Scorpion EVO! www.manticorearms.com
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Did you have a chance to talk to Franklin at SHOT? In a video I saw they mentioned a revised the Osprey system and had uppers on display fitted with them. I hope they bring them back to the market along with spare parts for the original units. I've been running a OPS-416 kit since 2013 on a FA receiver and love it. |
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Originally Posted By Clicker58: Did you have a chance to talk to Franklin at SHOT? In a video I saw they mentioned a revised the Osprey system and had uppers on display fitted with them. I hope they bring them back to the market along with spare parts for the original units. I've been running a OPS-416 kit since 2013 on a FA receiver and love it. I did talk to them and Franklin is bringing back the piston system in a line of guns, but at this time they are not offering it as a separate item (my understanding is they now are pinning the gas block so they want it to be on their barrels that are cut for the pin). Someone else also told me the new piston systems have some changes to parts, such as the piston no longer being "kidney" shaped, but I did not get that info directly from Franklin, but rather someone who was connected with them by business they had done together, so I cannot confirm or deny that. Sven Manticore Arms |
Advanced Fighting Gear for the AR, AK, AUG, Tavor, and Scorpion EVO! www.manticorearms.com
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Originally Posted By ClickClickBoom1: It looks like Adams Arms is back. https://youtu.be/BO-kOYphGOg?si=onK9vgQ8YT161y2l You can buy parts on Alexandria Pro-Fab's website, but be warned, they are piecemeal. 100% piecemeal. If you buy a forend, it does not come with the barrel nut or the screws. You have to buy the barrel nut separate and the screws separate. I just received a 10" foreend from them. I have all the other parts luckily, but if I didn't I'd have to order again and they charged $70 to ship to Alaska. SO... Be warned. I'm not blaming Pro-Fab, they are still figuring things out. Just letting people know. ETA: I've been talking with one of the guys at Pro-Fab over email about parts and shipping costs. They are obviously just getting their bearings on all of this so be patient with them. But he's working with me on shipping. So they are trying to do right. |
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Interested in the SA piston kit. I can not find instructions on their site, or find the answer anywhere. Does the front of the gas block come off to allow the piston to be removed from the front for cleaning? I am hoping so, as if the whole gas block has to be removed to remove/clean the piston, then it is a no go for me. |
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Originally Posted By Jeeps-And-Guns: Interested in the SA piston kit. I can not find instructions on their site, or find the answer anywhere. Does the front of the gas block come off to allow the piston to be removed from the front for cleaning? I am hoping so, as if the whole gas block has to be removed to remove/clean the piston, then it is a no go for me. Yes. There is a plug screw that comes out. The piston drops out. Clean and put back together |
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Originally Posted By hoody2shoez: Yes. There is a plug screw that comes out. The piston drops out. Clean and put back together Originally Posted By hoody2shoez: Originally Posted By Jeeps-And-Guns: Interested in the SA piston kit. I can not find instructions on their site, or find the answer anywhere. Does the front of the gas block come off to allow the piston to be removed from the front for cleaning? I am hoping so, as if the whole gas block has to be removed to remove/clean the piston, then it is a no go for me. Yes. There is a plug screw that comes out. The piston drops out. Clean and put back together Yep. The piston is easily accessible. I just placed an order from Optics Planet. They have a bunch in-stock, while SA shows most of theirs as out of stock. I'm going to put this one on my 5.56 'SPR'. If I like it enough, another will be going on a mid-length I have. Tired of DI ARs being dirty as shit shooting suppressed. |
"What is socialism? The most difficult and tortuous way to progress from capitalism to capitalism." -Stated at an intel conference, East Berlin, Oct. 1988
"Every election is a sort of advance auction sale of stolen goods." -H.L. Mencken
"Every election is a sort of advance auction sale of stolen goods." -H.L. Mencken
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Originally Posted By ClickClickBoom1: It looks like Adams Arms is back. https://youtu.be/BO-kOYphGOg?si=onK9vgQ8YT161y2l I think black rain owns adam's piston system now they may have tweaked enough just to patent it |
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Originally Posted By AR18: I believe that there will be another company that would make another drop in gp kit within the next five years. If a company makes the 416 GP system with a friendly install gas block that would make things bit more a standard for the piston system. That is an interesting idea! Sven Manticore Arms |
Advanced Fighting Gear for the AR, AK, AUG, Tavor, and Scorpion EVO! www.manticorearms.com
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Originally Posted By AR18: If a company makes the 416 GP system with a friendly install gas block that would make things bit more a standard for the piston system. Brownells has theirs, but trying to make it more AR compatible won’t work as the op rod offset is larger than the AR. So, the strike face on the carrier, upper receiver op rod hole, op rod & piston assembly, gas block inner workings are all moved up enough to require proprietary parts. |
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Originally Posted By CJofFL: Brownells has theirs, but trying to make it more AR compatible won’t work as the op rod offset is larger than the AR. So, the strike face on the carrier, upper receiver op rod hole, op rod & piston assembly, gas block inner workings are all moved up enough to require proprietary parts. Originally Posted By CJofFL: Originally Posted By AR18: If a company makes the 416 GP system with a friendly install gas block that would make things bit more a standard for the piston system. Brownells has theirs, but trying to make it more AR compatible won’t work as the op rod offset is larger than the AR. So, the strike face on the carrier, upper receiver op rod hole, op rod & piston assembly, gas block inner workings are all moved up enough to require proprietary parts. Yeah, I realized the HK416 style piston system requires a higher receiver and rail to make space. |
Advanced Fighting Gear for the AR, AK, AUG, Tavor, and Scorpion EVO! www.manticorearms.com
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Originally Posted By lew: Yep. The piston is easily accessible. I just placed an order from Optics Planet. They have a bunch in-stock, while SA shows most of theirs as out of stock. I'm going to put this one on my 5.56 'SPR'. If I like it enough, another will be going on a mid-length I have. Tired of DI ARs being dirty as shit shooting suppressed. Let us know how you like it and how it performs. Curious to see if you have a accuracy change too. I am interested in one for my 16in with mid length gas. I currently have the SA adjustable gas block and have been very happy with it. I need to measure my handguard to make sure it will clear. I am pretty sure it will, but I will need to double check. I too am tired of the filth when shooting suppressed. |
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This is how I did mine. BA 7.2" 1:7 barrel. AE extender so I could get enough length to get to the gas adjustment screws with the tool. A collar wouldn't have worked as it would have been too close to the gas block to get the adjustment tool in there. Attached File Attached File I love the over all length but in retrospect I think I'm going to send it out and have a longer barrel just cut down to about 8.75" so I have full rifling all the way to the brake. The extender on such a short barrel worries me if I get a can for it which I want to do. Attached File It all fits fine under this rail. |
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Originally Posted By Jeeps-And-Guns: Let us know how you like it and how it performs. Curious to see if you have a accuracy change too. I am interested in one for my 16in with mid length gas. I currently have the SA adjustable gas block and have been very happy with it. I need to measure my handguard to make sure it will clear. I am pretty sure it will, but I will need to double check. I too am tired of the filth when shooting suppressed. Originally Posted By Jeeps-And-Guns: Originally Posted By lew: Yep. The piston is easily accessible. I just placed an order from Optics Planet. They have a bunch in-stock, while SA shows most of theirs as out of stock. I'm going to put this one on my 5.56 'SPR'. If I like it enough, another will be going on a mid-length I have. Tired of DI ARs being dirty as shit shooting suppressed. Let us know how you like it and how it performs. Curious to see if you have a accuracy change too. I am interested in one for my 16in with mid length gas. I currently have the SA adjustable gas block and have been very happy with it. I need to measure my handguard to make sure it will clear. I am pretty sure it will, but I will need to double check. I too am tired of the filth when shooting suppressed. I'm gonna shoot it this coming weekend. I'm pretty certain (hard to see in the rail) that one of the clamping screws is contacting the inside of the rail, but I'll worry about that after function testing. Install was a breeze, and the instructions are very thorough. Mark from Superlative was really helpful with some tips. |
"What is socialism? The most difficult and tortuous way to progress from capitalism to capitalism." -Stated at an intel conference, East Berlin, Oct. 1988
"Every election is a sort of advance auction sale of stolen goods." -H.L. Mencken
"Every election is a sort of advance auction sale of stolen goods." -H.L. Mencken
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Originally Posted By SARonin: Nothing on their web site... Originally Posted By SARonin: Originally Posted By mobiushky: Alexandria Pro-Fab bought Adams Arms. So it's not likely black rain owns them now. Nothing on their web site... You can buy individual parts of Adams Arms piston kits at Alexandria Pro-Fab. If I were to guess, Alexandria was likely the company actually making the parts for Adams, and got the company as part of the bankruptcy proceedings/settlement of debts when Adams Arms shut down. I stopped by the Adams Arms booth at SHOT, it was staffed by who I believe were Alexandria Pro Fab employees and they said "we are still getting things sorted out, it will be a little bit before it is up and running again." Nice people and they seemed genuine. I wish them luck. Sven Manticore Arms |
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I put twenty rounds through my Superlative kit. 5.56 with a Thunder Beast suppressor. Set the gas block at "4" per the manual and didn't feel a need to change anything. Fired cases looked fine and there was way less fouling in the action. Accuracy seemed unchanged, but I'm going to take the handguard off and file down one of the screw heads a tad just to make sure there's clearance. Recoil was super soft and spotting hits was no problem. Very happy with the kit and installation guide, as well a Superlative's CS. |
"What is socialism? The most difficult and tortuous way to progress from capitalism to capitalism." -Stated at an intel conference, East Berlin, Oct. 1988
"Every election is a sort of advance auction sale of stolen goods." -H.L. Mencken
"Every election is a sort of advance auction sale of stolen goods." -H.L. Mencken
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Just checking on the AA thread and see ProFab aquired them. Since I had been thinking about spares I checked them out; hopefully they update their website to be better organized but here's what you get looking for AA parts: https://alexprofab.com/?s=Adams+Arms&post_type=product You can buy parts a al carte but they do have a .300 specific kit but the low profile gas block kits are more expensive than the original style kits. https://alexprofab.com/product/adams-arms-piston-kit-adjustable-micro-block-pistol-300-blk/ Zero experience with them, just what I saw looking at them just now. I do like the lower profile gas block if it allows you to use a smaller diameter handguard, the original gas block with the rail on top is clunky and the handguard is larger diameter than most these days. I almost never shoot mine so not sure I want to put any more money into it though, they're $135 for just the block. I had thought a piston kit might be worth trying on an AR-RPK style upper though since that concept is currently popular. |
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Originally Posted By lew: I put twenty rounds through my Superlative kit. 5.56 with a Thunder Beast suppressor. Set the gas block at "4" per the manual and didn't feel a need to change anything. Fired cases looked fine and there was way less fouling in the action. Accuracy seemed unchanged, but I'm going to take the handguard off and file down one of the screw heads a tad just to make sure there's clearance. Recoil was super soft and spotting hits was no problem. Very happy with the kit and installation guide, as well a Superlative's CS. Good to hear. Keep us updated as you shoot it more. Will be curious to see how it goes after some more rounds. I am about to pull the trigger on one for me. Edit: just ordered one. I went to SA's website and they were showing a St Patrick's day sale, but then showed out of stock on both the clamp on and set screw .750 mid kits. I found them showing in stock at optics planet. While they do not have the bolt to go with it (I will get it somewhere else) they also had a sale with the code patty. It knocked $36 off. Free shipping, so after sales tax total came to $242. |
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Originally Posted By Jeeps-And-Guns: Good to hear. Keep us updated as you shoot it more. Will be curious to see how it goes after some more rounds. I am about to pull the trigger on one for me. Edit: just ordered one. I went to SA's website and they were showing a St Patrick's day sale, but then showed out of stock on both the clamp on and set screw .750 mid kits. I found them showing in stock at optics planet. While they do not have the bolt to go with it (I will get it somewhere else) they also had a sale with the code patty. It knocked $36 off. Free shipping, so after sales tax total came to $242. Originally Posted By Jeeps-And-Guns: Originally Posted By lew: I put twenty rounds through my Superlative kit. 5.56 with a Thunder Beast suppressor. Set the gas block at "4" per the manual and didn't feel a need to change anything. Fired cases looked fine and there was way less fouling in the action. Accuracy seemed unchanged, but I'm going to take the handguard off and file down one of the screw heads a tad just to make sure there's clearance. Recoil was super soft and spotting hits was no problem. Very happy with the kit and installation guide, as well a Superlative's CS. Good to hear. Keep us updated as you shoot it more. Will be curious to see how it goes after some more rounds. I am about to pull the trigger on one for me. Edit: just ordered one. I went to SA's website and they were showing a St Patrick's day sale, but then showed out of stock on both the clamp on and set screw .750 mid kits. I found them showing in stock at optics planet. While they do not have the bolt to go with it (I will get it somewhere else) they also had a sale with the code patty. It knocked $36 off. Free shipping, so after sales tax total came to $242. As someone who is a Vendor for Optics Planet, I can tell you those kits are most likely not in stock at OP, and OP is just going to turn around and order them from Superlative Arms. You will get them eventually, and at a better price, but Optics Planet only stock about the top 10% of sellers, and orders the rest from the Vendor once a customer places an order. Sven Manticore Arms |
Advanced Fighting Gear for the AR, AK, AUG, Tavor, and Scorpion EVO! www.manticorearms.com
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Originally Posted By hoody2shoez:Yeah having to source a bolt is annoying af |
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Originally Posted By CJofFL: Don’t most just use a DI bolt minus the rings? I thought they all did. That said, I bought one of these for a recent AA build… https://vtsupply-com.3dcartstores.com/PWS-MK1-556-Piston-System-Bolt-Upgrade-Adams-or-Superlative-AR15-AR-15-300BLK-223-Wylde-Primary-Weapons-Systems-_p_6038.html It's literally any standard bolt. The fact it comes with the bcg included in the package but no bolt is just weird to me. |
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Originally Posted By Manticore_Arms: As someone who is a Vendor for Optics Planet, I can tell you those kits are most likely not in stock at OP, and OP is just going to turn around and order them from Superlative Arms. You will get them eventually, and at a better price, but Optics Planet only stock about the top 10% of sellers, and orders the rest from the Vendor once a customer places an order. Sven Manticore Arms Originally Posted By Manticore_Arms: Originally Posted By Jeeps-And-Guns: Originally Posted By lew: I put twenty rounds through my Superlative kit. 5.56 with a Thunder Beast suppressor. Set the gas block at "4" per the manual and didn't feel a need to change anything. Fired cases looked fine and there was way less fouling in the action. Accuracy seemed unchanged, but I'm going to take the handguard off and file down one of the screw heads a tad just to make sure there's clearance. Recoil was super soft and spotting hits was no problem. Very happy with the kit and installation guide, as well a Superlative's CS. Good to hear. Keep us updated as you shoot it more. Will be curious to see how it goes after some more rounds. I am about to pull the trigger on one for me. Edit: just ordered one. I went to SA's website and they were showing a St Patrick's day sale, but then showed out of stock on both the clamp on and set screw .750 mid kits. I found them showing in stock at optics planet. While they do not have the bolt to go with it (I will get it somewhere else) they also had a sale with the code patty. It knocked $36 off. Free shipping, so after sales tax total came to $242. As someone who is a Vendor for Optics Planet, I can tell you those kits are most likely not in stock at OP, and OP is just going to turn around and order them from Superlative Arms. You will get them eventually, and at a better price, but Optics Planet only stock about the top 10% of sellers, and orders the rest from the Vendor once a customer places an order. Sven Manticore Arms That may be, but I ordered my complete kit from Optics Planet and it shipped the next day. SA was out-of-stock. |
"What is socialism? The most difficult and tortuous way to progress from capitalism to capitalism." -Stated at an intel conference, East Berlin, Oct. 1988
"Every election is a sort of advance auction sale of stolen goods." -H.L. Mencken
"Every election is a sort of advance auction sale of stolen goods." -H.L. Mencken
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Originally Posted By CJofFL: Don’t most just use a DI bolt minus the rings? I thought they all did. That said, I bought one of these for a recent AA build… https://vtsupply-com.3dcartstores.com/PWS-MK1-556-Piston-System-Bolt-Upgrade-Adams-or-Superlative-AR15-AR-15-300BLK-223-Wylde-Primary-Weapons-Systems-_p_6038.html Yeah, I'm just using the DI bolt. Haven't even bothered to take the gas rings off. |
"What is socialism? The most difficult and tortuous way to progress from capitalism to capitalism." -Stated at an intel conference, East Berlin, Oct. 1988
"Every election is a sort of advance auction sale of stolen goods." -H.L. Mencken
"Every election is a sort of advance auction sale of stolen goods." -H.L. Mencken
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Originally Posted By Manticore_Arms: As someone who is a Vendor for Optics Planet, I can tell you those kits are most likely not in stock at OP, and OP is just going to turn around and order them from Superlative Arms. You will get them eventually, and at a better price, but Optics Planet only stock about the top 10% of sellers, and orders the rest from the Vendor once a customer places an order. Sven Manticore Arms Yep I got the email the next day saying it is backordered and they had 3 other substitute products in stock and ready for immediate shipping. However they were left handed or carbine versions. I need right hand mid length. So I hit reject and the estimated shipping date is the 30th. So we will see if/when it gets here. I am in no rush, so waiting a little time is no big deal. |
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Originally Posted By CJofFL: Don’t most just use a DI bolt minus the rings? I thought they all did. That said, I bought one of these for a recent AA build… https://vtsupply-com.3dcartstores.com/PWS-MK1-556-Piston-System-Bolt-Upgrade-Adams-or-Superlative-AR15-AR-15-300BLK-223-Wylde-Primary-Weapons-Systems-_p_6038.html Originally Posted By CJofFL: Originally Posted By hoody2shoez:Yeah having to source a bolt is annoying af Yea having to buy the bolt separately is BS. it should come complete. I ordered a toolcraft C158 DLC bolt kit (has cam pin, firing pin, etc..) from arm or ally. What would be the benefit of the bolt linked above other than not having the gas rings. Also, what is the point of the spring? |
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Originally Posted By Jeeps-And-Guns: What would be the benefit of the bolt linked above other than not having the gas rings. Also, what is the point of the spring? The spring keeps the bolt in the fully forward position during cycling when gas rings are removed. If the bolt is allowed to move freely, it can bounce back & forth inside the carrier, and rotate out of position, witch can lead to the bolt hitting the barrel, with the locking lugs out of time. The above post by lew leaving the gas rings on the bolt makes better sense than the spring, that people with the Adams kits are always looking for, even though McMaster-Carr has a decent match for pennies on the dollar of what the Adams springs go for. |
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Originally Posted By SARonin: The spring keeps the bolt in the fully forward position during cycling when gas rings are removed. If the bolt is allowed to move freely, it can bounce back & forth inside the carrier, and rotate out of position, witch can lead to the bolt hitting the barrel, with the locking lugs out of time. The above post by lew leaving the gas rings on the bolt makes better sense than the spring, that people with the Adams kits are always looking for, even though McMaster-Carr has a decent match for pennies on the dollar of what the Adams springs go for. I thought rotation was limited by the cam pin and the inside of the upper receiver. I can see a little movement. But when the carrier is driven back by cycling, it will move one way a little, but then when cycling back forward, the pressure of the recoil spring pushing on the carrier, then pushing on the bolt chambering a round, will overcome any gas ring or spring behind the bolt. The cam pin is limited how much it can move by the upper receiver track. Is there something else at play here I am not thinking of? I am not saying it is not happening, I am just not understanding how. |
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Originally Posted By SARonin: The spring keeps the bolt in the fully forward position during cycling when gas rings are removed. If the bolt is allowed to move freely, it can bounce back & forth inside the carrier, and rotate out of position, witch can lead to the bolt hitting the barrel, with the locking lugs out of time. The above post by lew leaving the gas rings on the bolt makes better sense than the spring, that people with the Adams kits are always looking for, even though McMaster-Carr has a decent match for pennies on the dollar of what the Adams springs go for. Originally Posted By SARonin: Originally Posted By Jeeps-And-Guns: What would be the benefit of the bolt linked above other than not having the gas rings. Also, what is the point of the spring? The spring keeps the bolt in the fully forward position during cycling when gas rings are removed. If the bolt is allowed to move freely, it can bounce back & forth inside the carrier, and rotate out of position, witch can lead to the bolt hitting the barrel, with the locking lugs out of time. The above post by lew leaving the gas rings on the bolt makes better sense than the spring, that people with the Adams kits are always looking for, even though McMaster-Carr has a decent match for pennies on the dollar of what the Adams springs go for. Where would one find the correct spring to order from them? |
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Originally Posted By Jeeps-And-Guns: I thought rotation was limited by the cam pin and the inside of the upper receiver. I can see a little movement. But when the carrier is driven back by cycling, it will move one way a little, but then when cycling back forward, the pressure of the recoil spring pushing on the carrier, then pushing on the bolt chambering a round, will overcome any gas ring or spring behind the bolt. The cam pin is limited how much it can move by the upper receiver track. Is there something else at play here I am not thinking of? I am not saying it is not happening, I am just not understanding how. That is correct. The cam pin- and thus the bolt- is only going to be able to rotate once it reaches the cutout on the left side of the upper. I only left the rings on because I was too lazy to take them off. They do add some resistance to movement, but it's not much nor is it necessary. |
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