The LBE Unlimited AR-15 Bolt Catch Plunger (LBE Unlimited part no. ARBCPL20PK) is a spring-loaded small part that seats behind the bolt catch in a mil-spec AR-15 lower receiver, tensioning the catch so it engages the bolt reliably when a magazine runs dry. LBE Unlimited machines this plunger from 1117 steel and manufactures it in the USA rather than sourcing an overseas casting. Selling it as a 20-pack makes it an easy way for a builder, armorer, or range shop to keep a stock of small, easy-to-lose parts on hand. It’s a direct-fit replacement for the factory plunger on any standard AR-15 lower.

Key Specifications

• Machined from 1117 steel for a durable, direct-fit replacement part.
• Ships as a 20-pack, giving you enough spares for multiple builds or repairs.
• Manufactured in the USA.
• Fits standard mil-spec AR-15 lower receivers.
• Works with the bolt catch assembly, tensioning it so the catch engages the bolt reliably.

Frequently Asked Questions

How many plungers come in this listing? It ships as a 20-pack, enough for several builds or repairs.

What does a bolt catch plunger do? It tensions the bolt catch from behind so the catch engages the bolt reliably when the magazine runs dry.

Will this fit a standard AR-15? Yes, it’s sized for mil-spec AR-15 lower receivers.

Buy the LBE Unlimited AR-15 Bolt Catch Plunger

Small AR-15 lower parts like this one have a way of disappearing at the range or during a build, and a 20-pack means you won’t be stuck mid-project without one. Order it from our LBE Unlimited lineup, part of our full selection of AR lower parts, from our Lubbock, Texas gun shop, and it ships fast to your door.