After ignoring lots of advice and being told that I was "building a bomb", I'm happy to report that my 18650 powered Stryfe is fully functional! : r/ Nerf
Nerf Stryfe LiPo Mod Guide - YouTube
Amazon.com: Nerf Pro Stryfe X Dart Semi-Auto Blaster, Rechargeable LiPo Battery, 30 AccuStrike Half-Length Darts, 15-Dart Magazine, 150 FPS, Eyewear, 14+ (Amazon Exclusive) : Toys & Games
Urban Taggers.: Nerf N-Strike Elite Stryfe: Impressive. Very Impressive.
The Maker's Box: Basic Nerf Stryfe Electrical Modifications, Part 2
Amazon.com: Nerf Pro Stryfe X Dart Semi-Auto Blaster, Rechargeable LiPo Battery, 30 AccuStrike Half-Length Darts, 15-Dart Magazine, 150 FPS, Eyewear, 14+ (Amazon Exclusive) : Toys & Games
Worker Mod F10555 Lipo Battery Compartment Fixed Stock 3D Printed Orange for Nerf Stryfe