diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index c66e5c20b99ca..95135294ccd48 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -27,6 +27,11 @@ rustlibs.dll @AffectedArc07
 rustlibs_prod.dll @AffectedArc07
 rust_g.dll @AffectedArc07
 
+# temp executables because life is pain
+rustlibs_515.dll @AffectedArc07
+rustlibs_516.dll @AffectedArc07
+rustlibs_515_prod.dll @AffectedArc07
+rustlibs_516_prod.dll @AffectedArc07
 ### S34NW
 
 # TGUI stuff
diff --git a/.github/workflows/build_rust.yml b/.github/workflows/build_rust.yml
index de2c3208b0f83..3f8c690054ef9 100644
--- a/.github/workflows/build_rust.yml
+++ b/.github/workflows/build_rust.yml
@@ -65,7 +65,6 @@ jobs:
           git pull origin "$PR_BRANCH" --depth=$((ahead_by + 1))
           git remote add upstream "https://github.com/$BASE_REPOSITORY.git"
           git fetch upstream "$BASE_BRANCH" --depth=$((behind_by + 1))
-          cd rust
 
           # Get dependencies.
           rustup target add i686-unknown-linux-gnu
@@ -74,18 +73,10 @@ jobs:
           sudo apt-get update
           sudo apt-get install zlib1g-dev:i386 lib32gcc-13-dev mingw-w64 mingw-w64-i686-dev
 
-          # Build it.
-          cargo build --release --target i686-unknown-linux-gnu
-          cargo build --release --target i686-pc-windows-gnu
-
-          # Copy the built targets to their checked-in locations.
-          cp target/i686-unknown-linux-gnu/release/librustlibs.so ../tools/ci/librustlibs_ci.so
-          cp target/i686-pc-windows-gnu/release/rustlibs.dll ../rustlibs.dll
-
-          # Build the para-specific version
-          RUSTFLAGS='-C target-cpu=znver5' cargo build --release --target=i686-pc-windows-gnu
-          cp target/i686-pc-windows-gnu/release/rustlibs.dll ../rustlibs_prod.dll
+          # Run the build
+          tools/ci/build_all_rustlibs.sh
 
+          # And commit
           git commit -a -m "Build Rust library" --allow-empty
           git push origin
 
diff --git a/_build_dependencies.sh b/_build_dependencies.sh
index 7d1eb5a143724..79b52e1303ed0 100644
--- a/_build_dependencies.sh
+++ b/_build_dependencies.sh
@@ -10,7 +10,7 @@ export STABLE_BYOND_MINOR=1633
 # Beta Byond Major - Uncomment and update if beta cycle active
 export BETA_BYOND_MAJOR=516
 # Beta Byond Minor - Uncomment and update if beta cycle active
-export BETA_BYOND_MINOR=1648
+export BETA_BYOND_MINOR=1657
 # Python version for mapmerge and other tools
 export PYTHON_VERSION=3.11.6
 # RUSTG version
diff --git a/code/__DEFINES/rust.dm b/code/__DEFINES/rust.dm
index a78d48c341f2b..7d0e52c8fa4cc 100644
--- a/code/__DEFINES/rust.dm
+++ b/code/__DEFINES/rust.dm
@@ -18,13 +18,18 @@
 #endif
 
 /proc/__detect_rustlib()
+	var/version_suffix = "515"
+	if(world.byond_build >= 1651)
+		version_suffix = "516"
+
 	if(world.system_type == UNIX)
 #ifdef CIBUILDING
 		// CI override, use librustlibs_ci.so if possible.
-		if(fexists("./tools/ci/librustlibs_ci.so"))
-			return __rustlib = "tools/ci/librustlibs_ci.so"
+		if(fexists("./tools/ci/librustlibs_ci_[version_suffix].so"))
+			return __rustlib = "tools/ci/librustlibs_ci_[version_suffix].so"
 #endif
 		// First check if it's built in the usual place.
+		// Linx doesnt get the version suffix because if youre using linux you can figure out what server version youre running for
 		if(fexists("./rust/target/i686-unknown-linux-gnu/release/librustlibs[RUSTLIBS_SUFFIX].so"))
 			return __rustlib = "./rust/target/i686-unknown-linux-gnu/release/librustlibs[RUSTLIBS_SUFFIX].so"
 		// Then check in the current directory.
@@ -34,14 +39,14 @@
 		return __rustlib = "librustlibs[RUSTLIBS_SUFFIX].so"
 	else
 		// First check if it's built in the usual place.
-		if(fexists("./rust/target/i686-pc-windows-msvc/release/rustlibs[RUSTLIBS_SUFFIX].dll"))
-			return __rustlib = "./rust/target/i686-pc-windows-msvc/release/rustlibs[RUSTLIBS_SUFFIX].dll"
+		if(fexists("./rust/target/i686-pc-windows-msvc/release/rustlibs.dll"))
+			return __rustlib = "./rust/target/i686-pc-windows-msvc/release/rustlibs.dll"
 		// Then check in the current directory.
-		if(fexists("./rustlibs[RUSTLIBS_SUFFIX].dll"))
-			return __rustlib = "./rustlibs[RUSTLIBS_SUFFIX].dll"
+		if(fexists("./rustlibs_[version_suffix][RUSTLIBS_SUFFIX].dll"))
+			return __rustlib = "./rustlibs_[version_suffix][RUSTLIBS_SUFFIX].dll"
 
 		// And elsewhere.
-		var/assignment_confirmed = (__rustlib = "rustlibs[RUSTLIBS_SUFFIX].dll")
+		var/assignment_confirmed = (__rustlib = "rustlibs_[version_suffix][RUSTLIBS_SUFFIX].dll")
 		// This being spanned over multiple lines is kinda scuffed, but its needed because of https://www.byond.com/forum/post/2072419
 		return assignment_confirmed
 
diff --git a/rust/.cargo/config.toml b/rust/.cargo/config.toml
new file mode 100644
index 0000000000000..93801863ce650
--- /dev/null
+++ b/rust/.cargo/config.toml
@@ -0,0 +1,2 @@
+[build]
+target = "i686-pc-windows-msvc"
diff --git a/rust/Cargo.lock b/rust/Cargo.lock
index ffbbc755eface..e3df62388fa9d 100644
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -93,9 +93,9 @@ checksum = "0c4b4d0bd25bd0b74681c0ad21497610ce1b7c91b1022cd21c80c6fbdd9476b0"
 
 [[package]]
 name = "bindgen"
-version = "0.70.1"
+version = "0.71.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f49d8fed880d473ea71efb9bf597651e77201bdd4893efe54c9e5d65ae04ce6f"
+checksum = "5f58bf3d7db68cfbac37cfc485a8d711e87e064c3d0fe0435b92f7a407f9d6b3"
 dependencies = [
  "bitflags 2.5.0",
  "cexpr",
@@ -141,8 +141,8 @@ checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
 
 [[package]]
 name = "byondapi"
-version = "0.4.11"
-source = "git+https://github.com/spacestation13/byondapi-rs.git#c3b15e8574eca87865c640616029e6ea72da4cd1"
+version = "0.5.14"
+source = "git+https://github.com/spacestation13/byondapi-rs.git#299384dd1f7ceadd9759fe205de02a629193bf79"
 dependencies = [
  "byondapi-macros",
  "byondapi-sys",
@@ -153,8 +153,8 @@ dependencies = [
 
 [[package]]
 name = "byondapi-macros"
-version = "0.1.3"
-source = "git+https://github.com/spacestation13/byondapi-rs.git#c3b15e8574eca87865c640616029e6ea72da4cd1"
+version = "0.2.3"
+source = "git+https://github.com/spacestation13/byondapi-rs.git#299384dd1f7ceadd9759fe205de02a629193bf79"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -163,8 +163,8 @@ dependencies = [
 
 [[package]]
 name = "byondapi-sys"
-version = "0.11.2"
-source = "git+https://github.com/spacestation13/byondapi-rs.git#c3b15e8574eca87865c640616029e6ea72da4cd1"
+version = "0.12.3"
+source = "git+https://github.com/spacestation13/byondapi-rs.git#299384dd1f7ceadd9759fe205de02a629193bf79"
 dependencies = [
  "bindgen",
  "doxygen-rs",
@@ -517,9 +517,12 @@ source = "git+https://github.com/SpaceManiac/SpacemanDMM?rev=6c5a751516ae0e8add4
 
 [[package]]
 name = "inventory"
-version = "0.3.15"
+version = "0.3.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f958d3d68f4167080a18141e10381e7634563984a537f2a49a30fd8e53ac5767"
+checksum = "ab08d7cd2c5897f2c949e5383ea7c7db03fb19130ffcfbf7eda795137ae3cb83"
+dependencies = [
+ "rustversion",
+]
 
 [[package]]
 name = "itertools"
@@ -930,9 +933,9 @@ dependencies = [
 
 [[package]]
 name = "rustc-hash"
-version = "1.1.0"
+version = "2.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
+checksum = "357703d41365b4b27c590e3ed91eabb1b663f07c4c084095e60cbed4362dff0d"
 
 [[package]]
 name = "rustlibs"
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index 77be2902dbb9d..5ab9f163e6aa7 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -11,7 +11,7 @@ crate-type = ["cdylib"]
 [dependencies]
 atomic_float = "1.0.0"
 bitflags = "2.5.0"
-byondapi = { git = "https://github.com/spacestation13/byondapi-rs.git", version = "0.4.7" }
+byondapi = { git = "https://github.com/spacestation13/byondapi-rs.git", version = "0.5.14", default-features = false }
 eyre = "0.6.12"
 rand = { version = "0.8.5", features = ["small_rng"] }
 scc = "2.1.1"
@@ -35,3 +35,8 @@ walkdir = "2.5.0"
 regex = "1.10.5"
 png = "0.17.16"
 chrono = "0.4.39"
+
+[features]
+default = ["byond-515"]
+byond-515 = ["byondapi/byond-515-1621"]
+byond-516 = ["byondapi/byond-516-1651"]
diff --git a/rust/README.MD b/rust/README.MD
new file mode 100644
index 0000000000000..c3a5c733b77f0
--- /dev/null
+++ b/rust/README.MD
@@ -0,0 +1,16 @@
+# Paradise Rust Libraries
+
+## Info
+
+These libraries allow rust code for things that are incredibly slow or outright impossible in DM.
+Think of it like a ParadiseSS13 specifiy version of [rust-g](https://github.com/tgstation/rust-g).
+
+It currently handles:
+
+- Atmospherics (`milla`)
+- DMM manipulation stuff (`mapmanip`)
+
+## Building
+
+BYOND 516.1651 introduced breaking changes to ByondAPI, the interop system to get data other than strings in and out of DLLs.
+Because of this, you need to specify the `--no-default-features --features byond-516` to build the 516 compliant lib. Not specifying a feature will build for versions `515.1621` to `516.1650`. Specifying `byond-516` will build for `516.1651` and up.
diff --git a/rust/src/lib.rs b/rust/src/lib.rs
index 66ed4b0b1bbb4..aad7a1b1b2b0a 100644
--- a/rust/src/lib.rs
+++ b/rust/src/lib.rs
@@ -1,3 +1,11 @@
 mod logging;
 mod mapmanip;
 mod milla;
+
+#[cfg(all(not(feature = "byond-515"), not(feature = "byond-516")))]
+compile_error!("Please specify byond-515 or byond-516 as a feature to specify BYOND version.");
+
+#[cfg(all(feature = "byond-515", feature = "byond-516"))]
+compile_error!(
+    "Please specify ONLY byond-515 or bypnd-516 as a feature to specify BYOND version, not all features."
+);
diff --git a/rust/src/milla/api.rs b/rust/src/milla/api.rs
index a92b648732eb4..cfd7eb5d8f427 100644
--- a/rust/src/milla/api.rs
+++ b/rust/src/milla/api.rs
@@ -100,15 +100,29 @@ pub(crate) fn internal_create_environment(
 
 /// BYOND API for loading a block of turfs into MILLA with their default air.
 #[byondapi::bind]
-fn milla_load_turfs(data_property: ByondValue, low_corner: ByondValue, high_corner: ByondValue) -> eyre::Result<ByondValue> {
+fn milla_load_turfs(
+    data_property: ByondValue,
+    low_corner: ByondValue,
+    high_corner: ByondValue,
+) -> eyre::Result<ByondValue> {
     let property_ref = data_property.get_strid()?;
     for turf in byond_block(byond_xyz(&low_corner)?, byond_xyz(&high_corner)?)? {
         let (x, y, z) = byond_xyz(&turf)?.coordinates();
         let mut property = turf.read_var_id(property_ref)?;
         let data = property.get_list_values()?;
+
+        #[cfg(feature = "byond-516")]
+        property.decrement_tempref();
+
+        #[cfg(feature = "byond-515")]
         property.decrement_ref();
+
         if data.len() != 17 {
-            return Err(eyre!("data property has the wrong length: {} vs {}", data.len(), 17));
+            return Err(eyre!(
+                "data property has the wrong length: {} vs {}",
+                data.len(),
+                17
+            ));
         }
 
         internal_set_tile(
diff --git a/rustlibs.dll b/rustlibs_515.dll
similarity index 50%
rename from rustlibs.dll
rename to rustlibs_515.dll
index 02988d613277f..2c65bedafeb2d 100644
Binary files a/rustlibs.dll and b/rustlibs_515.dll differ
diff --git a/rustlibs_prod.dll b/rustlibs_515_prod.dll
similarity index 50%
rename from rustlibs_prod.dll
rename to rustlibs_515_prod.dll
index c48f9c15bf8ae..3b855a32789e4 100644
Binary files a/rustlibs_prod.dll and b/rustlibs_515_prod.dll differ
diff --git a/rustlibs_516.dll b/rustlibs_516.dll
new file mode 100644
index 0000000000000..aa2deb2a58d9c
Binary files /dev/null and b/rustlibs_516.dll differ
diff --git a/rustlibs_516_prod.dll b/rustlibs_516_prod.dll
new file mode 100644
index 0000000000000..c04c533f9e920
Binary files /dev/null and b/rustlibs_516_prod.dll differ
diff --git a/tools/ci/build_all_rustlibs.sh b/tools/ci/build_all_rustlibs.sh
new file mode 100755
index 0000000000000..de533ea46c73d
--- /dev/null
+++ b/tools/ci/build_all_rustlibs.sh
@@ -0,0 +1,37 @@
+#!/bin/bash
+
+# Make is fail early if theres a problem
+set -euo pipefail
+
+# Get to our folder first
+cd rust
+
+WINDOWS_TARGET="i686-pc-windows-gnu"
+LINUX_TARGET="i686-unknown-linux-gnu"
+
+# Handle building on windows
+if [[ "$OSTYPE" == "msys" ]]; then
+	WINDOWS_TARGET="i686-pc-windows-msvc"
+fi
+
+# Build it for CI
+cargo build --release --target $LINUX_TARGET
+cp target/$LINUX_TARGET/release/librustlibs.so ../tools/ci/librustlibs_ci_515.so
+cargo clean
+cargo build --release --target $LINUX_TARGET --no-default-features --features byond-516
+cp target/$LINUX_TARGET/release/librustlibs.so ../tools/ci/librustlibs_ci_516.so
+
+# Build it for Windows
+cargo build --release --target $WINDOWS_TARGET
+cp target/$WINDOWS_TARGET/release/rustlibs.dll ../rustlibs_515.dll
+cargo clean
+cargo build --release --target $WINDOWS_TARGET --no-default-features --features byond-516
+cp target/$WINDOWS_TARGET/release/rustlibs.dll ../rustlibs_516.dll
+
+# Build the para-specific version
+export RUSTFLAGS='-C target-cpu=znver5'
+cargo build --release --target=$WINDOWS_TARGET
+cp target/$WINDOWS_TARGET/release/rustlibs.dll ../rustlibs_515_prod.dll
+cargo clean
+cargo build --release --target=$WINDOWS_TARGET --no-default-features --features byond-516
+cp target/$WINDOWS_TARGET/release/rustlibs.dll ../rustlibs_516_prod.dll
diff --git a/tools/ci/librustlibs_ci.so b/tools/ci/librustlibs_ci.so
deleted file mode 100644
index 53ebaa7bc58ea..0000000000000
Binary files a/tools/ci/librustlibs_ci.so and /dev/null differ
diff --git a/tools/ci/librustlibs_ci_515.so b/tools/ci/librustlibs_ci_515.so
new file mode 100644
index 0000000000000..b7b4069ac3363
Binary files /dev/null and b/tools/ci/librustlibs_ci_515.so differ
diff --git a/tools/ci/librustlibs_ci_516.so b/tools/ci/librustlibs_ci_516.so
new file mode 100644
index 0000000000000..ccab9f88c2790
Binary files /dev/null and b/tools/ci/librustlibs_ci_516.so differ