Magpul MAG803-BLK Tactile Lock-Plate Type 1 for PMAG GEN M3 AR/M4 & AR 300 B, Polymer, Black, 1/8" Ridge, 5-Pack
- Type:
- Accessory
- Firearm Group:
- AR Platform
- Finish-Color:
- Black
- Model:
- Tactile Lock-Plate
- Material:
- Polymer
- Model Fit:
- AR, M4
The Magpul MAG803-BLK Tactile Lock-Plate Type 1 for PMAG GEN M3 AR/M4 and AR 300 B magazines is a no-fuss upgrade for shooters who want better control and ergonomics at the mag well. This five-pack of polymer lock-plates replaces the factory floor plate on compatible PMAGs, giving you a textured, ridged surface that's easier to manipulate when you're pressing rounds into the magazine or stripping a loaded mag during a reload. Built from durable polymer in black, these are designed to handle the wear and tear of regular range days and field use without adding bulk or weight.
The Type 1 design features a 1/8-inch ridge that provides tactile feedback without aggressive sharp edges. The textured surface is especially useful in gloved conditions—whether you're running a competition, hunting in cold weather, or training in rough terrain. Each lock-plate is molded to fit snugly on GEN M3 PMAG bodies, both in the standard AR/M4 platform and the shorter AR 300 B configuration. The five-pack gives you options: outfit multiple mags, keep spares on hand, or try them across different rifle setups without breaking the bank on individual upgrades.
If you're running PMAGs as your primary magazine platform, these lock-plates are a small investment that pays dividends in day-to-day usability. They're not about flashy looks—they're about making magazine handling smoother, faster, and more confident when it counts.
Key Features
- Compatible with Magpul PMAG GEN M3 AR/M4 and AR 300 B magazines
- Polymer construction with textured, tactile surface for improved grip and control
- 1/8-inch ridge design for reliable handling in gloved or bare-hand conditions
- Straightforward floor plate replacement—no gunsmithing required
- Five lock-plates per pack
- Black finish
Specifications
| Material | Polymer |
| Color | Black |
| Ridge Height | 1/8 inch |
| Quantity | 5 per pack |
| Compatible Platforms | PMAG GEN M3 AR/M4, PMAG GEN M3 AR 300 B |
Frequently Asked Questions
Will these lock-plates fit my PMAG GEN M3 magazine?
Yes, the MAG803-BLK Type 1 lock-plates are designed as direct replacements for the floor plates on Magpul PMAG GEN M3 AR/M4 and AR 300 B magazines. Standard installation is straightforward and requires no tools or modifications.
Do I need any tools to install these lock-plates?
The supplied facts do not specify installation requirements or tools needed. We recommend consulting the product manual or contacting Magpul support for detailed installation guidance.
What's the difference between Type 1 and other Tactile Lock-Plate designs?
The supplied facts describe the Type 1 model with a 1/8-inch ridge. For comparisons to other lock-plate variants, consult the full Magpul lineup or contact us for guidance on which design best suits your setup.
Why buy the five-pack instead of single lock-plates?
The five-pack lets you upgrade multiple magazines at once or keep replacements handy. Since most shooters run several PMAGs across different rifles or in their range bag, having a pack on hand is practical and cost-effective.

