B3 Archery Exit L4 Open Hook 4 Finger Thumb Release

B3 Archery Exit L4 Open Hook 4 Finger — Thumb Button Simplicity Done Right

The B3 Archery Exit L4 is a 4-finger open hook thumb button release built on B3's patented lock-and-load system — the same foundation that made the entire Exit series one of the most trusted thumb button lines in bowhunting. The L4 is clean, reliable, and purpose-built for hunters who want the simplicity and consistency of an open hook thumb trigger in a four-finger handle. A hand polished stainless steel hook, anodized OD green finish, adjustable thumb barrel, and removable lanyard round out a release that gets out of your way and lets you focus on the shot.

Key Features of the B3 Exit L4 Open Hook

Patented Lock-and-Load System

B3's lock-and-load is the defining feature of every Exit-series release. There's no cocking button to push, no spring to fight — close the open hook onto your D-loop and the sear sets itself. It's fast, it's quiet, and it eliminates the fumbling that can cost you a shot in a hunting situation. Once under load at full draw, the hook is locked securely with no chance of accidental release.

Open Hook Design

The open hook jaw gives you the fastest, most reliable attachment to your D-loop of any release type. No calipers to squeeze open, no buttons to push — lay the hook on the loop and draw. In cold weather with gloves on, in low light, or in the kind of tense moment when a buck walks under your stand, the open hook loads without thought. The hand polished stainless steel hook provides a smooth, consistent contact surface with the loop for a clean, consistent break every time.

4-Finger Handle

The L4's four-finger configuration gives hunters with larger hands a fuller, more secure grip than a 3-finger handle provides. More fingers on the release means a more relaxed grip, which contributes to a cleaner, more repeatable thumb trigger break. The handle is designed with a fully radiused profile for comfort across extended sessions at the range or all-day sits in the stand.

Anodized OD Green Finish

The OD green anodized finish keeps the L4 field-ready without being flashy. Non-reflective and durable, the finish holds up to regular hunting use and doesn't look out of place in the timber.

Adjustable Thumb Barrel

Thumb barrel position is adjustable to accommodate different hand sizes and thumb lengths. Finding the right barrel position for your anatomy is the single most important factor in getting consistent thumb trigger performance — and the L4 gives you the adjustability to dial it in.

Removable Lanyard

The removable lanyard lets you customize how you carry the release. Attach it for a wrist-worn hunting setup that keeps the release secured and ready, or remove it for a clean, lanyard-free configuration for range work or personal preference.

Who the B3 Exit L4 Is Built For

• Bowhunters who want a no-nonsense open hook thumb button that loads fast and shoots clean
• Hunters with larger hands who need a 4-finger handle for a proper grip
• Anyone who has shot a 3-finger B3 Exit and wants a bigger handle on the same proven system
• Archers transitioning from a wrist strap to a handheld thumb trigger for the first time

B3 Exit L4 Specifications

Why Extreme Outfitters Recommends the B3 Exit L4

B3 has built a reputation on making thumb button releases that are simple, reliable, and genuinely well-made — and the Exit series is the clearest expression of that. The lock-and-load open hook system is faster to load than anything with a cocking mechanism, the stainless hook is smoother than cast alternatives, and the overall execution is clean without being overbuilt or overpriced. The L4 specifically addresses hunters who want four fingers on the release for a more settled grip. If you're in the market for a hunting thumb button and you haven't shot a B3 Exit, come try one. The break is crisp, the hook is secure, and the whole system is simpler than most people expect.

Frequently Asked Questions — B3 Exit L4 Open Hook

How does the lock-and-load system work?

You close the open hook onto your D-loop — the sear sets automatically, no button required. The hook stays locked until you press the thumb trigger. At full draw under load, the sear breaks cleanly with no perceptible creep. After firing, manually close the hook back onto the loop to reset for the next shot.

Is this release adjustable?

The thumb barrel position is adjustable to fit different hand sizes. Some internal sear adjustments may also be available depending on configuration — consult Extreme Outfitters for full setup details.

What's the difference between the Exit L4 and the standard Exit?

The Exit L4 is the 4-finger version of B3's Exit open hook thumb button. The standard Exit is a 3-finger design. The L4 gives hunters with larger hands a fuller, more secure grip on the same lock-and-load open hook platform. The L4 also features an OD green anodized finish compared to the standard black finish on the base Exit.

Can the lanyard be removed?

Yes. The lanyard is removable and can be left off if you prefer a clean, lanyard-free setup.

Is this a wrist strap or handheld release?

The Exit L4 is a handheld thumb button release — it is held in the hand rather than strapped to the wrist. The removable lanyard provides optional wrist security for hunting situations, but the release itself is a handheld design.

What size D-loop is it compatible with?

The Exit L4's open hook is compatible with standard D-loop material diameters used in most compound bow setups. Contact Extreme Outfitters if you have questions about compatibility with your specific loop material.