The LBE Unlimited AR Handguard Cap, Round with M4 Cuts in Black Steel (LBE Unlimited part no. ARHCR) is a handguard end cap built by LBE Unlimited to install behind the front sight base on AR-platform rifles using round or triangular handguards. Machined from 8620 steel to a .750-inch diameter and cut with M4-pattern notches, it’s built to work with original-style and most aftermarket round handguards that need a proper end cap for a finished, secure fit. LBE Unlimited has built its reputation as a US manufacturer of gun parts and accessories, and this cap follows that standard with straightforward, durable construction at an affordable price point for builders and armorers stocking spares.

Key Specifications

• Measures .750 inches in diameter to match standard round handguard sizing.
• Machined from 8620 steel for durability under repeated handling.
• Cut with M4 pattern notches for compatibility with M4-style handguards.
• Installs behind the front sight base on AR-platform rifles.
• Finished in black to match standard AR furniture.

Frequently Asked Questions

Where does this cap install? It installs behind the front sight base on AR-platform rifles using round or triangular handguards.

What is it made from? 8620 steel, finished in black.

Buy the LBE Unlimited AR Handguard Cap

Finish out your handguard install with a proper factory-pattern end cap. Order this LBE Unlimited cap from our AR upper parts selection for fast, insured shipping from our Lubbock, Texas gun shop.