Upgrade your Primaris Space Marines with Tight Bore Designs jump pack conversion bits, perfect for Warhammer 40k and Horus Heresy armies, making Vanguard Veterans or Assault Intercessors.
The new Vanguard Veterans reveal has a lot of people looking twice and wondering if GW really just handed them Assault Intercessors with jump packs and called it a day. The upcoming 11th edition launch box may still be a ways off, but the look of the veterans is already familiar enough that plenty of Space Marine players can see the workaround right now.
If you’ve already got spare marines on the shelf, there’s a strong case for skipping the wait and building your own.
That’s where Tight Bore Designs’ Prime Jet Packs come in. Instead of buying a giant launch set for one unit or chasing split kits across the secondary market, you can drop these onto existing Assault Intercessors or Horus Heresy marines and put together your own Vanguard Veteran stand-ins with very little fuss (and maybe even use Horus Heresy minis to look different and save even more money).
For once, this is a conversion idea that actually sounds as easy as it looks.
New Jump Pack Bits Let You Build Vanguard Veterans (or Assault Intercessors) Now
Updated April 13th, 2026, by Rob Baer with the new information and links. Pricing accurate as of this publish date. Every qualifying purchase helps Spikey Bits keep the lights on and the fun going.
The concept is simple, which is exactly why it works. Tight Bore Designs’ Prime Jump Packs come in a set of five and are compatible with Horus Heresy and Warhammer 40k Space Marine miniatures. So if you’ve got Assault Intercessors collecting dust, or a stack of Heresy bodies waiting for a new project, you’re already most of the way there.
Prime Jet Packs Set of 5: $14.89
These aren’t trying to reinvent the unit or turn a basic marine into some overbuilt display piece. They give hobbyists a fast, clean way to get very close to the new Vanguard Veteran look without waiting on GW’s release schedule. For a lot of players, especially anyone with an overstuffed bits box and a backlog full of power armor, that’s exactly the kind of project that actually gets finished.
The packs are printed in high-quality cured resin to a 25-micron standard, and, in terms of size and profile, they look very close to the official bits. If you’re putting conversion parts next to GW plastics, they need to pass the glance test. These do.
The Main Difference Comes Down to Basing, Not the Packs Themselves
The Prime Jet Pack model is on the left
The jump packs themselves are almost the same size and overall shape as the official version, which is really the whole point. If the backpack looks right, most players will know exactly what the model is supposed to be.
The biggest difference is that the official jump pack marines tend to be posed on scenic rocks and bits of battlefield debris, which gives them a little extra height and motion. That’s not a hard problem to solve. Anyone who’s built a Space Marine army for more than five minutes probably already has cork, slate, rubble, skulls, broken pipes, or half a ruined cathedral sitting somewhere in the hobby pile.
That also gives converters a bit more freedom. You can keep the build simple if you just want tabletop-ready Vanguard Veterans fast, or you can dress them up with relic bits, veteran helmets, fancier shoulder pads, and more dramatic basing if you want them to feel like they earned the title. Either way, these new Prime Jet Packs are doing the heavy lifting.
Final Thoughts: A Smart Buy for Players Who Don’t Want the 11th Edition Launch Box
Launch boxes are great until you only want one thing from them. Then you’re looking at a big buy-in, a pile of extra models you didn’t plan on, and the usual nonsense that starts once people begin splitting boxes online. Most 40k players have been through that routine before.
If the new Vanguard Veterans caught your eye but the launch box didn’t (or even if it did and you just want to use up extra Marines), Prime Jet Packs offer a clean workaround. Use your current Assault Intercessors. Raid your Horus Heresy pile. Swap on the packs, do a little cleanup work, and you’ve got something that matches the look closely enough to get the job done now instead of waiting for GW to sell the unit on its own.
Click Here to Get Your Prime Jet Packs!
How many sets will you grab?
