ARC-LR RRS-LOCK® ARCA QUICK-RELEASE LEVER CLAMP: 40MM SPECS
IS THE ARC-LR RRS-LOCK® ARCA QUICK-RELEASE LEVER CLAMP: 40MM RIGHT FOR YOU?
- Best for: Photographers and shooters who want fast, repeatable Arca-style clamping with added centering and safety-stop engagement.
- Choose it if: You want ambidextrous, top-loading operation that opens and closes quickly from either side.
- Compatibility: Adjustable clamp tolerance accommodates many third-party Arca-style plates and rails.
- Field advantage: Visual lock indication gives instant confirmation of clamp status.
- Carry profile: Weighs just 0.25 lb (0.11 kg) in a compact 40 mm form factor.
- Mount interface: 1.5" Arca-style dovetail paired with the RRS-LOCK® system's 5 mm steel pin to resist unintentional movement.
- Field advantage: R-Mount interface minimizes twisting and play between the clamp and RRS heads for long-term stability.
- Compatibility note: Clamps from 2020 onward use an updated attachment style; use the Clamp Rosette Adapter (sold separately) to fit older ball heads.

Fast, RRS-LOCK® lever control for secure, Arca-style clamping in a compact 40 mm form factor
ARC-LR RRS-LOCK® Arca Quick-Release Lever Clamp — 40 mm
The ARC-LR is RRS's RRS-LOCK® equipped lever-release clamp, designed to deliver rapid, repeatable clamping on 1.5" Arca-style rails with added safety and centering features. A 5 mm steel RRS-LOCK pin engages compatible rails to resist unintentional movement, while the ambidextrous butterfly latch and lever provide intuitive operation from either side.
Adjustable tension allows you to tune the clamp to many third-party Arca-style plates, making this 40 mm clamp a versatile upgrade for ball heads, leveling bases, and custom support setups.
Note: As of 2020, all clamps feature an updated attachment style and will not sit flush with older ball heads. To adapt legacy heads, use the Clamp Rosette Adapter (sold separately).
ARC-LR RRS-LOCK® ARCA QUICK-RELEASE LEVER CLAMP: 40MM FEATURES
- RRS-LOCK® system adds centered indexing and safety-stop engagement to compatible RRS 1.5" standard rails, using a 5 mm steel pin to help prevent unintentional movement.
- R-Mount interface minimizes twisting and play between the ARC-LR and RRS heads for long-term stability.
- Easy top-loading design enables quick transitions from closed to fully open positions for fast, hassle-free attachment from above.
- Secondary latch increases security by helping prevent accidental lever opening during transport or use.
- Visual lock indication gives instant confirmation of clamp status for added confidence.
- Adjustable clamp tolerance accommodates many third-party Arca-style plates and rails for broader compatibility.
WHAT'S IN THE BOX?
- 1 ARC-LR RRS-LOCK® Arca Quick-Release Lever Clamp — 40 mm
- 1x Flat head screw, 1/4"-20 x 1.25" long
- 1x Flat head screw, M6-1.0 x 25 mm
- 1x 5/32" hex key
- 1 QR-code reference card for user manual
2 Reviews
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ARC-LR
Come devo fare per acquistare il Morsetto di rilascio e quando potete consegnarlo?
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Excellent
Excellent quality. Easy to adjust. I like how the lock works perfectly with my RRS Sony A7RV L bracket.