US-DesignedBuilt & engineered in the USA
Free ShippingOn orders over $100
30-Day ReturnsNo-hassle return policy
Companion AppRound tracking & customization
LE PricingAgency & department pricing available
Veteran OwnedFounded & run by veterans
Smart Magazine BaseplatePre-Order Open

Always Know
Your Count.
No Guessing.

The world's first weight-based smart magazine baseplate. Real-time round tracking. BLE connected. Built for professionals.

Reserve Early Access See How It Works
Scroll
0g
Added Profile Height
BLE 5.0
Wireless Protocol
● Live
Real-Time Round Count
IP5X
Field-Ready Rating
Product Photo Placeholder

The Product

Precision Built.
Purpose Driven.

The D3KR Smart Magazine Baseplate replaces your standard baseplate with a precision load-cell assembly that measures remaining rounds by weight — no moving parts, no electronics in the feed path, no compromises to reliability.

Data streams continuously to the D3KR app and optional HUD via BLE 5.0. Know your count. Track your sessions. Build real training data — not guesswork.

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Simple Setup

Three Steps.
Zero Guesswork.

01
Install
Drop In
Remove the factory baseplate. Slide on the D3KR assembly. Lock it in place. 60 seconds, no tools, no gunsmith, zero profile change.
Tool-Free Install
02
Pair
Connect
Open the D3KR app and pair over BLE 5.0. No account required. No config screens. The magazine identifies itself and syncs automatically.
BLE 5.0 Auto-Pair
03
Track
Know Your Count
Real-time round count on your phone, HUD, or Apple Watch. Every mag change and round fired is logged. Actual training data — not guesswork.
Real-Time + Logged

Inside The Build

Every Part.
Purpose Built.

01
OEM-Spec Baseplate Shell
Drop-in replacement dimensioned to factory tolerances. No holster changes. No profile change.
Drop-In Fit
02
Precision Load Cell
Measures remaining rounds by weight. No moving parts in the feed path. Sub-gram accuracy.
Patent Pending
03
ESP32-S3 Control Board
Dual-core processor handles sensor fusion, BLE communication, and OTA firmware updates.
BLE 5.0
04
Rechargeable Li-Ion Cell
Compact lithium-ion battery. USB-C charging. Engineered for extended field use.
USB-C
05
OLED Display Module
High-contrast display readable in direct sunlight or total darkness. Real-time round count at a glance.

Why D3KR

Built Different.

01
Weight-Based Counting
No optical sensors. No hall-effect magnets. Load-cell precision measures what's left — round by round — without entering the feed path.
02
BLE 5.0 Connected
Magazine talks to HUD. HUD talks to app. App logs training data. One platform, not four disconnected products.
03
No Profile Change
Dimensioned to OEM tolerances. Standard holster compatibility. It swaps in — nothing else changes.
04
Training Data
Round-by-round session logs. Consistency benchmarks. Actual data where there was only guesswork before.
05
Field-Ready Hardware
Built to withstand recoil, weather, and heavy use. Not a gadget. Not a prototype. A tool.
06
OTA Firmware Updates
New features and improvements delivered wirelessly. Your baseplate gets better over time — no disassembly required.

Platform Support

Works With
Your Platform.

More platforms added with each firmware release. OTA updates push automatically.

Available
Glock
G17, G19, G19X, G34 — Gen 3, 4, 5
9mm
Available
Glock
G26 — Gen 3, 4, 5
9mm Subcompact
Available
S&W M&P
M&P 9, M&P 40 Full Size
9mm / .40
Available
Sig P320
Full, Carry, Compact
9mm
Coming Soon
Sig P365
P365, P365XL
9mm
Coming Soon
CZ P-10
P-10C, P-10F
9mm
Coming Soon
HK VP9
VP9, VP9SK
9mm
Coming Soon
Walther PDP
PDP Full, PDP Compact
9mm
Available Now
Coming Soon
Request a platform →

Gallery

See It In Action.

Photo
Product — Front View
Photo
Product — Side Profile
Photo
Installed on Magazine
Video
B-Roll — Range Test
Photo
Detail — OLED Display
Video
B-Roll — Installation

Early Operators

Trusted by the People
Who Run It.

★★★★★
5.0 / 5 — Beta Program
★★★★★

Install took under a minute. No holster change. Count has been dead accurate across 400 rounds and three range sessions. This is the kit we've been asking manufacturers for.

T
T. Vasquez
Patrol Officer — Beta Tester
★★★★★

I run my students through high-round drills where accountability matters. The session logs alone are worth it — we now have actual data on where people are losing count under stress.

D
D. Hargrove
Lead Firearms Instructor
★★★★★

Fits my Gen 5 19 perfectly. The HUD integration is seamless — count shows up exactly when I need it. Already recommended it to the whole quals team.

M
M. Callahan
Competitive Shooter — USPSA

Early Access

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