Long Bag Rider for B5/LMT Sopmod Stock

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This “Long” Bag Rider is designed to fit the B5 or LMT Sopmod stocks and provides a 5inch footprint for stability when used with a bag. It enables the user to still have use of the stock bottom strap slot if required. 

Requires four M4x20 screws and M4 nuts for installation. I recommend putting some Loctite blue on the nut to keep the screw from unthreading during use. Sized for either a socket head or button head screw to fit. I tried to optimize around a single common screw that comes with most M- screw sets to minimize complexity and make removal easier if the bag rider will not always be used.

The print profile will work on printer beds A1 mini sized and up!

I’ve had good success with using PETG with 8 walls, 6 top shell layers, 6 bottom shell layers, 25% sparse infill with a Honeycomb pattern, 50% Infill/Wall Overlap and supports enabled. These are the settings in the print profile and what I would recommend if printing from a download. If your stock stays in a safe then PLA+ will be fine, if you are ever using it then PETG or better would be my recommendation to account for impact/vibration/temperature.

I have a compact bag rider and a bag rider with Picatinny for the Sopmod as well, and bag riders designed for the B5 Bravo and the Magpul MOE/CTR if you have those stocks too!

Bag Rider with Picatinny: https://makerworld.com/en/models/2861276-bag-rider-with-picatinny-for-b5-sopmod#profileId-3193046

Compact Bag Rider: https://makerworld.com/en/models/2801117-compact-bag-rider-for-b5-lmt-sopmod-stock#profileId-3134107

Special thanks to @johnnyutah556 for testing and taking some photos that can be used for the description!

Change Log:

5/18/26: Release at RevA