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Posted: 5/17/2024 6:26:32 AM EDT
Anyone know where a few are to be found?
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Faithful follower of Jesus Christ. Ephphatha! Maranatha!
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[#2]
I came hear to ask similar- curious about HK21 builds in general and what is different about them. I can't recall any build information - might have been the last one I saw was a Vollmers conversion many years ago. I don't think HK21 kit building has been a thing yet.
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[#3]
Quick search.... https://www.hkpro.com/threads/hk21-barrels.574898/
Post was from about a month ago. |
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Then conquer we must, when our cause it is just,
And this be our motto: 'In God is our trust.' And the star-spangled banner in triumph shall wave O'er the land of the free and the home of the brave! |
[#4]
RCM is going to be making a run of hk21 barrels since all the parts kits dropped. Email them to get on the list. Haven't listed price yet, but they said "not going to price gouge"
Beltfed Precision Products can modify his 21e barrels for the 21, and he is going to be making more, they run 950 if he is doing your build, not sure of price of you just buying the barrel. I already put my deposit down with BPP for the build....everyone with a kit is going to need a barrel and I'm betting he covers his builds before he is selling them a la cart. Figured better to get in line now before all these other guys do ![]() |
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[#5]
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More LIBERTY less Government
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[Last Edit: Heineken]
[#6]
Originally Posted By osprey21: I have two 21 barrels, they're NOT for sale. https://www.ar15.com/media/mediaFiles/766/hkbarrels-3217818.jpg View Quote This is the exact same from EVERY one I know who has them ![]() Just get a new production barrel OP, it's just an FMP kit, I wouldn't worry bout trying find an FMP barrel. |
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[#7]
You and everyone else who bought a HK21 kit that is currently for sale.
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[#8]
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[#9]
Originally Posted By Heineken: RCM is going to be making a run of hk21 barrels since all the parts kits dropped. Email them to get on the list. Haven't listed price yet, but they said "not going to price gouge" Beltfed Precision Products can modify his 21e barrels for the 21, and he is going to be making more, they run 950 if he is doing your build, not sure of price of you just buying the barrel. I already put my deposit down with BPP for the build....everyone with a kit is going to need a barrel and I'm betting he covers his builds before he is selling them a la cart. Figured better to get in line now before all these other guys do ![]() View Quote Mike Otte probably has options for 21 barrels too. |
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[#10]
I think the MM barrels are available for ~1500.
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[#11]
Originally Posted By osprey21: I have two 21 barrels, they're NOT for sale. https://www.ar15.com/media/mediaFiles/766/hkbarrels-3217818.jpg View Quote Were those reprofiled to lightweight 21E contour? |
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[Last Edit: Heineken]
[#12]
Originally Posted By BASE: I think the MM barrels are available for ~1500. View Quote Damn. I heard the RCM barrels are going to be around 500. If one wanted to get it done fast, and secured a barrel, PCS is doing these builds with an 8 week timeline which is CRAZY fast. I have an 8-9 month wait with BPP. I'm about to get a MM, cxl BPP and, go with PCS. |
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[#13]
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[#14]
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[Last Edit: h00ktern]
[#15]
Me too. No reply to an email I sent May 21st. FMP 21 barrels sold for 1k a month ago, now they're listing for 2k. Seems like every other HK price increase over the past few years. It doesn't stop...
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[#16]
625.00
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[#17]
There’s going to be a long line at that price. If anyone can pull it off, it would probably be them.
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[#18]
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"The character inherent in the American people has done all that has been accomplished; and it would have done somewhat more, if the government had not sometimes got in its way."
-- Henry David Thoreau (1817-1862) |
[#19]
Is there some reason for the renewed interest? Parts kits on the market?
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Tactipug. The ultimate compact firepower!
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[#20]
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[#21]
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"The character inherent in the American people has done all that has been accomplished; and it would have done somewhat more, if the government had not sometimes got in its way."
-- Henry David Thoreau (1817-1862) |
[#22]
Originally Posted By mah827: Is there some reason for the renewed interest? Parts kits on the market? View Quote |
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More LIBERTY less Government
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[#23]
View Quote That’s what I was guessing. Is someone making flats or complete receivers? I’m not sure how much I would want a semi belt fed. An autosear is well out of my budget. Still kinda cool. Good luck to all of you that build or get one built. |
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Tactipug. The ultimate compact firepower!
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[#24]
They are built on G3/HK91 receivers or flats. The feed box from the kit gets welded on and then the rail stiffeners. I think the rear sight base is even the same on the non-e-model 21’s.
I’m a little nervous about the feed box grafting part. |
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[#25]
We at RCM are going make barrels, trunnions and a hybrid bolt head. It will be a blend between the factory 21 and 21E. We are also going to make oversized rollers to help achieve headspace due to some worn out parts. Also T-Rails are on the list.
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[#26]
Originally Posted By strikeone: We at RCM are going make barrels, trunnions and a hybrid bolt head. It will be a blend between the factory 21 and 21E. We are also going to make oversized rollers to help achieve headspace due to some worn out parts. Also T-Rails are on the list. View Quote FUCK. YEAH. Thanks for updating here. I was hesitant about bugging the shop and holding up progress. |
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[#27]
Originally Posted By BASE: They are built on G3/HK91 receivers or flats. The feed box from the kit gets welded on and then the rail stiffeners. I think the rear sight base is even the same on the non-e-model 21’s. I’m a little nervous about the feed box grafting part. View Quote Getting it located and fabbing a jig to keep it square is my biggest concern as well. I have several G3 flats. I would assume one would want to do the grafting after they are bent? I need some more G3 kits to practice on. ![]() |
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[#28]
Originally Posted By Pro_Patria_431: Getting it located and fabbing a jig to keep it square is my biggest concern as well. I have several G3 flats. I would assume one would want to do the grafting after they are bent? I need some more G3 kits to practice on. ![]() View Quote The few pics I’ve seen of builds online makes it look like they are folded and at least mostly welded up. I’m hoping I get some better ideas once I have the parts in hand. |
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[#29]
Originally Posted By strikeone: We at RCM are going make barrels, trunnions and a hybrid bolt head. It will be a blend between the factory 21 and 21E. We are also going to make oversized rollers to help achieve headspace due to some worn out parts. Also T-Rails are on the list. View Quote ![]() |
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[#30]
Originally Posted By strikeone: We at RCM are going make barrels, trunnions and a hybrid bolt head. It will be a blend between the factory 21 and 21E. We are also going to make oversized rollers to help achieve headspace due to some worn out parts. Also T-Rails are on the list. View Quote I already have a handful of 21E barrels. Will they be compatible with your new bolt heads? Thanks. |
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[#31]
Yes
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[#32]
Originally Posted By strikeone: We at RCM are going make barrels, trunnions and a hybrid bolt head. It will be a blend between the factory 21 and 21E. We are also going to make oversized rollers to help achieve headspace due to some worn out parts. Also T-Rails are on the list. View Quote Will you offer 23e barrels and boltheads? |
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[#33]
Anyone know if shorter barrels were ever a thing with HK or FMP? I know I saw a 14.4” for sale a while back but can’t remember where now. I’ve spent a lot of time searching since and haven’t seen another.
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[#34]
Originally Posted By BASE: Anyone know if shorter barrels were ever a thing with HK or FMP? I know I saw a 14.4” for sale a while back but can’t remember where now. I’ve spent a lot of time searching since and haven’t seen another. View Quote I *think* those are just custom cut down barrels. |
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[#35]
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[#36]
That's a cute little thing but it looks like a 51B length recoil assy.
I made a dummy barrel for my build and it ended up right at 14.5, just because I needed it to stick out of the shroud a little. I think it looks about right with that length. |
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[#37]
Originally Posted By osprey21: https://i.postimg.cc/QCqBHNsx/14-21.jpg View Quote RDTS 21E PDW. Midwest Tactical had one for sale last year. I think Ralph used one if his SD cages as the shroud. |
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[#38]
Wow, it looks like maybe an Mp5sd cocking tube? And the shroud and front bushing appear to be homebrew as well. I was planning on building a short hk21, but it never occurred to me that you could easily just weld whatever you want to the front of it. Shortening the factory shroud is a huge pain because the thin tube inside the cocking tube has to be replaced, and the cocking notch/ support will need reworked. Thanks for pointing that out.
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[Last Edit: JoshNC]
[#39]
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[Last Edit: JoshNC]
[#40]
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