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Thread: HK 53K from a HK 33 Kit?

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    Gunco Member dunn6902's Avatar
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    Default HK 53K from a HK 33 Kit?

    Hi, I remember seeing a build thread on a 51K made from a G3 kit.Could a 53K pistol be made from one of the HK33 cut barrel kits and 53 flats being sold now?There are a few issues I want to figure out before I get a kit,like will I need a different locking piece and can I buy a cocking tube or will I have to modify the one in the kit. - Thanks in advance

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    Grand Poobah Gunco's Avatar
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    If you get a HK33 kit with cut barrel you are good to go, The 33 cut barrel is long enough to make into a 53 barrel. Or you can get a kit with out the barrel and buy a 53 US made barrel from several resources.

    The locking piece from a 33 kit is the same for a 53 (both are 223). This is what I have been told by multiple sources.

    The 33 cocking tube can be modified to be used on a 53 (this is the cheapest way to go and hardest if you don't know what your doing) or there are HK parts suppliers who have 53 cocking tubes, and they're not cheap.


    I'm working on this same build right now and from my research the parts that need to be modified are:

    Bolt carrier - shortened
    Recoil spring assy - shortened
    Cocking tube support - shortened
    Triple frame support coolar - needs to be made and added to barrel.


    Here is a link with a 93 to 53 build pics. 9353.htm

    You can also talk with gilliebear here on the site he has done some of these builds and is very knowledgeable when it comes to HK convertions.
    "Courage is being scared to death - and saddling up anyway." - The Duke

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    Grand Poobah Gunco's Avatar
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    Here is the HK53 manual for referrence
    Attached Files Attached Files
    "Courage is being scared to death - and saddling up anyway." - The Duke

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    Gunco Member dunn6902's Avatar
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    Thanks for the manual and the advice.I'm looking to build an even shorter k version,like the picture of the MP-5KPDW picture in your MP-5 thread but in .223 and without the vertical grip.I read that you had to modify your MP-5 reciever to make it work.I also read in a the older hk51 clone thread that the 51 needed a #18 locking piece because of the short barrel and decreased backpressure.I'd like to find out if this applys the the .223 as well.I guess what I'm looking to build would be an SP-89 in .223.
    Last edited by dunn6902; 12-07-2008 at 11:40 PM.

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    Gunco Member pale horse's Avatar
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    I have a hk 33 kit boy looks a bit over my head may send it away to get worked on but always wanted a hk53 or the dreaded 308 wolfpak

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    Grand Poobah Gunco's Avatar
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    The more I've been looking into it the more simple it looks to build. The welding would probably be the hardest part if you didn't have that equipment of skill.
    Everything else can be done with hand tools if you take your time.

    The only other part I can see is finding the demensions and specs to the parts that need to be shortened. I haven't been about to find any of that info.
    "Courage is being scared to death - and saddling up anyway." - The Duke

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    Gunco Member dunn6902's Avatar
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    Quote Originally Posted by Gunco View Post
    The more I've been looking into it the more simple it looks to build. The welding would probably be the hardest part if you didn't have that equipment of skill.
    Everything else can be done with hand tools if you take your time.

    The only other part I can see is finding the demensions and specs to the parts that need to be shortened. I haven't been about to find any of that info.

    That's what I've been looking for.I can use an SP-89 handgrip to determine the barrel length before cutting it.My friend has a lathe so once I remove the reciever section he could probably chuck it up trunion and all to cut and crown the barrel.I read that sometimes you actually have to lenghten the bolt carrier for a shorter gun so it will cycle a round from the magazine.The reciever and cocking tube dimensions would be real helpful since trial and error cutting could get expensive.I'm getting ahead of myself since I still need to get a kit but I like to have as much info as possible before laying out any cash.

    This is what I'm looking for.If anyone has a picture of the other side could they post it.Obviously this one would be a class 3 but it would only be a $5 tax stamp.
    Attached Images Attached Images

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    Grand Poobah Gunco's Avatar
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    Break down so far for my HK53 build

    HK33 parts kit $300 - Apex
    HK53 barrel (new US made) $175 - Rim Country
    HK33 flat (New US made) $159 weld kit $25 - HKparts
    HK MP5 forearm (US made) $30 off gunbroker
    HK 53 #3 locking piece for 62 grain bullets $50 gunbroker
    Total so far is $739

    Everything else should be modified from the HK33 parts kit......i think
    "Courage is being scared to death - and saddling up anyway." - The Duke

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    Gunco Member dunn6902's Avatar
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    That's a good price compared to the price of a brand new gun.How was the Apex kit?If I can find someone who is getting rid of their old cut barrel that could save me some money compared to the $489 kits with a cut barrel.

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    Grand Poobah Gunco's Avatar
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    My 33 kit will be here tomorrow according to UPS tracking number so I will post some pics.

    Ya if you could get a already cut 33 barrel for cheap that would be a great way to save a little $$
    "Courage is being scared to death - and saddling up anyway." - The Duke

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