Warne Picatinny Side Mount Adapter 45 degree – Black
$59.19
Warne A645 Side Mount Adapter (45°) for MSR-style Firearms
Mfg: Warne Manufacturing Co.
Cat: Picatinny-Style Universal Mounts
Key Features:
Designed for Flat Top MSR’s and tactical style firearms.
45° accessory platform for co-witnessing backup sights.
Ultra-lightweight, machined aluminum construction.
6 in stock
The Warne A645 machined aluminum Side Mount is designed for Flat Top MSR’s and other tactical style firearms. It provides a 45 degree accessory platform that attaches to a Picatinny style rail. The A645 Mount can also be mounted to the rail on the hand guard to allow your back-up sight to co-witness with the sight on your R.A.M.P. Mount.
- To add to its already sleek design the A645 Side Mount has been redesigned to incorporate two cut out sections to achieve an ultra-lightweight feel.
- The side rails have also been updated with one more additional cross slot to increase the mounting capabilities to 4 slots total.
- This is a simple installation and requires no modification to your firearm.
| Weight | 0.115 lbs |
|---|---|
| Dimensions | 5.500 × 3.650 × 0.900 in |
| Manufacturer | Warne |
| Finish | Black |
| Weight | ultra-lightweight |
| Material | machined aluminum |
| Dimensions | not specified |
| Compatible With | Flat Top MSR, tactical style firearms |
PROCESSING & SHIPPING
Orders typically ship within 1–3 business days (Monday–Friday) after payment and all required documentation are received. Time to arrival after shipment depends on the carrier. Shipping method is at BT Gun Company’s discretion; ammunition and oversized accessories are charged at actual shipping cost. We do not ship to Hawaii or Alaska.
FIREARM TRANSFERS
- Firearms must ship to a licensed FFL dealer of your choosing — confirm with them first that they can accept the transfer.
- Your receiving FFL will need to email their license to [email protected] before we can ship.
- Inspect your firearm at your FFL’s location before signing ATF Form 4473 — once signed, the firearm is considered accepted.
You’re responsible for knowing the firearms laws in your state before ordering. For complete shipping, returns, and restocking-fee policy details, see our Shipping & Returns page.

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