You have to lock the bolt to the rear using the bottom of the bolt release. Press that in while slowly sliding the charging handle back to the receiver.
Owner - Argyle Armoring, LLC Custom AR-15 rifles, firearms sales, pistol upgrades, accessories, and gear.
NRA Life Member, Friends of NRA Sponsor, & Member of NRA Business Alliance
Certified GLOCK Armorer
Quality. Precision. Every Time.
What do I know? I'm only a professional.