The Dead Air Thread Spacer, 1/2-28 (brand part no. DA423) is a suppressor accessory built for barrels with muzzle threads longer than the standard 0.4-inch length. Dead Air Silencers designed the spacer to fill that extra thread length, giving a rimfire suppressor the blast-chamber space it needs for optimal performance and reduced baffle erosion. Internal threads keep the spacer affixed to the barrel even when the suppressor itself is removed, so it does not need to be taken on and off every time the suppressor comes off. This is an ordinary Title I accessory used to correctly configure a barrel for suppressor use; it is not itself a regulated NFA item.

Key Specifications

• Threaded 1/2-28, a standard pattern for common rimfire and pistol-caliber barrels.
• Built to correct blast-chamber spacing on barrels with muzzle threads longer than the standard 0.4-inch length.
• Uses internal threads to stay affixed to the barrel even when the suppressor is removed.

Frequently Asked Questions

Do I need this spacer for every rimfire suppressor? Only if your barrel’s muzzle threads are longer than the standard 0.4 inches; this spacer fills that extra length for correct blast-chamber spacing.

Is this spacer itself an NFA item? No, it is an ordinary accessory used to correctly configure a barrel for suppressor use; the suppressor itself is the regulated NFA item, not this spacer.

Buy the Dead Air Thread Spacer, 1/2-28

Get your barrel’s thread length dialed in correctly before mounting a rimfire suppressor. Browse Schaefer Defense’s Class 3 parts and accessories and order from our Lubbock, Texas gun shop for fast shipping.