The goal for this rifle was simple. We wanted a compact setup that still gives us a bump in the night style gun without dropping back down to a 10.5". Our older 10.5" build worked fine, but we wanted a little more barrel to squeeze out more velocity while keeping the rifle small and easy to work with. The 12.5" Geissele Super Duty Mod 1 upper ended up fitting exactly what we wanted.
We haven’t had this build long, but we’ve shot it enough to form early thoughts and figure out what feels right and what might change later.
The whole point of this setup was to get something compact that still hits harder than a 10.5". You get more velocity and better performance without losing the maneuverability of a short rifle. We weren’t trying to build a long-range rifle here. This is meant to be practical, fast, and good under nods.
The heart of the build is the Geissele 12.5" Super Duty MOD1 upper we picked up from 801 Weapon Works. If you want to check out the same upper, here is the link Upper.
Geissele’s machining is clean, the lockup is tight, and this gave us a reliable foundation to build everything else off of.
We used a Blemula lower from Primary Arms. Great coating, minimal blemishes, and a solid value for the price. If you want to look at the same lower, here’s the link Lower.
The lower is running:
The SBA3 brace on here is an old one we painted years ago. Once we SBR this rifle, it will get a matching B5 stock.
We’ve drifted away from LPVOs lately and have been sticking to dots and holographic sights for rifles like this. We put an EOTech on a Unity riser to get a better heads-up position, especially under nods. If you want to check out the optic, here’s the link EOTech
The 100 Concepts kill flash is still up in the air for us. On an EOTech, you see more of the honeycomb than you do with an LPVO, so we’re not totally decided on keeping it.
The Geissele rail is solid, the lockup is great, and it gives us MLOK where we actually need it.
The light setup includes:
Everything is mounted using a Meteorite Concepts pivot mount. If you want to check it out, here’s the link Pivot Adapter
The PEQ is mainly here for night vision use and because it fits the role of this rifle. Nothing complicated here.
We’re running a HuxWRX can with a KeyMo mount. If you want the same setup, here’s the link HuxWRX Ventum 556
The flow through design works really well on shorter guns. Minimal gas in the face so far and no complaints at this stage.
This build is still fresh, so there are a few things we might adjust as we shoot it more.
Other than that, this is one hell of a compact rifle and fits the role exactly how we wanted.
A compact bump in the night style setup that works well under nods and still hits harder than a 10.5".
We wanted a little more velocity without sacrificing size.
For a compact rifle like this, a dot is faster, cleaner, and feels more natural.
Not sure yet. Still testing.
This Geissele 12.5" Super Duty setup checks all the boxes we had for it. Compact, practical, night vision friendly, and with more punch than a 10.5". We’ll have more to say as we shoot it, but so far everything feels right.
The full parts list is available in our Builds Section
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