Its hard not to be inspiried by your exploits
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Iām working on a similar project! Iāve gone with PVC for my handguard for now though, Iāve not got access to the tools nor experience nor confidence to cut metal like that, particularly not freehand with a dremel. The length looks a touch awkward right now, but should be made better once I print a dummy belt feed to slot in over the mag terminal.
I was able to get away with fitting the outer barrel to the existing aluminium block where the T-piece slots in, then grinding out the receiver a little so the barrel + block slides in from the rear - Iāve found it to be plenty stable.
Now working on channeling my inner @Bigmuthadrums to make a giant box mag by frankensteining an m249 feed mech with the top of an mp5 mag, terminals and feed tube, just have to get the wires all hooked up and the whole thing glued together.
I love the work youāve done though, how did you get the bipod slot at the base of the handguard looking so close to the real deal?
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Thats brilliant work mate, Iām 3d printing all my parts based off a 1:1 file of the exact gun, so no metal on mine other than using old alloy barrels as supports insite the top gas tube.
the top tube and barrel iāve extended with PVC pipe that has a 3d printed inner spacer for the gap between the pvc and the alloy barrel (support).
The barrel is also same PVC with a 3d printed spacer for the actual alloy barrel that will be used.
for mine i cut the lower barrel assembly in half and made 3d printed spacers to gule onto those and also allow the pvc to sit over nicely.
for the upper gas tube i have the stock top tube still in place but printed a spacer to match the thread pattern / lenth as an extender to the stock front rings.
PM me if you want the .stl file for the actual hk21.
how did you do the carry handle?
Iām also currently doing up a design for the mag adaptor to look like a proper belt feed. ill try and get a pic from my phone up.
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Cheers! That makes a lot more sense, the photo you posted looked like it was done from some sort of cut metal, so at least itās looking like the real thing. Iāve only got a small hobby printer myself, so aside from some final touches to pretty it up, Iām being pretty basic with materials.
I ended up sourcing my barrel from renegade blasters as a 50cm generic alloy unit on clearance. itās too tight a fit for the aluminium block as-is, but with a grinding wheel I managed to get it on there and epoxied in place pretty well. Same deal with the spacers too - what barrel length did you go with?
Iāve done similar with my top gas tube, but it looks like mine is seated slightly lower to account for the PVC thickness and just slides over the existing front sight fitting.
Will do, Iām planning on getting the slicing tool out to cut some pieces off here and there, so having the file ready to go will be a huge help 
Nothing too special for the carry handle, I just bought a rail mounted carry handle off Aliexpress along with the extended top rail for the MP5 - works a treat. Next attachment to figure out is the bipod, I have a donor from a zb26 project that never got off the ground, so at least it gets some use here.
Looks great though, Iāll be keen to see how it looks once on!
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Not my pic but I think this would be cool to have a pseudo 19x with a compensator.
So a 19 slide on a 17 frame. Iām sure itāll be possible. A good idea for someone to try.
or that 
(i need 20 chars to make the minimum)
You been watching Deadpool2 ? 
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Looks pretty mean!
Donāt forget to straighten that front suppressor before you finish and paint 
Wonāt be the actual suppressor Iāll use on it, the way it attaches doesnāt work with the pistols thread, just there to cover the long barrel I have on it.
I am curious as to whether Kublai P1 parts are TM compatible with their Glocks?
I think TM were a different standard for GBB parts, but I donāt actually own a Glock too
Some places are saying that they are compatible. this sounds so confusing for gel ballers
Thatās āstandardisationā for ya, everyone just has to be slightly differentā¦
What is that, a Barrett? 
That looks soooo toughā¦ 
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