Holosun HS510C Spacer for lower 1/3 Mount
- Elevates 510C optics to a lower 1/3 cowitness height (approximately 1.6 inches)
- Machined from high-quality aluminum for robustness and resistance to recoil
- The 510C Spacer mounts securely between the 510C optic and the quick-detach (QD) mount
- Features precise machining and a secure fit to prevent movement during recoil
- Window Size: 0.58x0.77
- Dimension (in): 1.6x0.98x0.95
- Weight (oz): 1
- Housing Material: 6061 T6 Aluminum
- Surface Finish: Anodize
Optimal Height Adjustment: Elevates 510C optics to a lower 1/3 cowitness height (approximately 1.6 inches), facilitating quicker target acquisition and improved sight alignment.
Sturdy Construction: Machined from high-quality aluminum for robustness and resistance to recoil, providing a stable platform that maintains zero under rigorous use.
Easy Installation: The 510C Spacer mounts securely between the 510C optic and the quick-detach (QD) mount, offering straightforward installation without compromising on security.
Enhanced Compatibility: Designed to fit seamlessly with most 510C optics and QD mounts, ensuring compatibility across various firearm platforms and setups.
Precision Engineering: Features precise machining and a secure fit to prevent movement during recoil, ensuring consistent accuracy shot after shot.
- Holosun 10 years / product lifetime warranty. Read more here
Tactical Scope Shipping Policy
Our aim is to ensure that your order arrives with you as soon as possible and in the safest, most cost-effective means.
Shipping charges may be subject to additional surcharges if out of area or over weight restrictions.
DPD SHIPMENTS REQUIRE THE CUSTOMER TO SHOW A PIN CODE ON DELIVERY – READ MORE: HERE
Note: The above DPD link is to our group partner site Optics Warehouse, with whom we share logistics and stock. Link opens in a new window.
Couriers




We use DPD, Royal Mail, TNT, and UPS courier services for all our UK and international orders. Once your order is dispatched, you will receive an email with your unique tracking number.
In-Store Items
These are items we have in stock and aim to dispatch within 1–2 working days. During busy periods, this may be delayed slightly. If you'd prefer to collect your item in person, please contact us in advance to arrange. Collection orders must be paid for beforehand.
Pre-Order Items
Pre-order items are typically out-of-stock or in limited supply. Purchasing a pre-order secures your item, and it will be dispatched within 24 hours of restock where possible. Check the product page for estimated restock dates. These dates may change, so staying in touch is advised.
International Delivery & Taxes
If your shipping address is outside the UK, you may incur import duties or taxes upon arrival in your country. These charges are your responsibility. Customs regulations vary, so please check with your local customs office. Some packages may be opened for inspection.
Need Help?
If you need assistance, call us at +44 (0)1803 611895 (Optics Warehouse) or email order@tacticalscope.co.uk.
DPD Shipments & PIN Code Delivery
We have now introduced DPD Pin Code verification for all orders shipped via DPD. You will receive a PIN via email and text.
A valid email and mobile number must be provided at checkout. Emails will come from Riviera House 3PL. Please check spam/junk folders if not received.
Failure to present your PIN to the delivery driver will result in a failed delivery and rescheduling may be required.