Overview
The ROMEO4T line is nearly identical to the 4XT, with the main difference being the battery. Instead of the low-slung AAA, the 4T runs off of a standard CR2032 coin cell. This smaller battery offers a slightly slimmer footprint and slight weight savings while maintaining a 50,000-hour battery life. The 4T offers several flip cover options, a killflash, and four swappable reticles. The included mount comes in at absolute height, but the included spacer can be installed to bring the optic up to a lower 1/3rd co-witness. Unlike the 4XT, the 4T also comes with a low mount, allowing it to be better used on platforms like the MP5 or AK74/47 that require lower optics.
What's Included
Romeo4T-PRO
- 1x SIG SAUER ROMEO4T-PRO Red Dot Sight
- 1x Low Mount
- 1x Killflash
- 1x Rubber Bikini Lens Cover
- 1x Multi-Tool
- 1x T10 Torx Bits
- 1x Mount Spacer
- 1x Long Mount Screws
- 1x Cleaning Cloth
- 1x CR2032 Battery
- Clear Flip-Up Covers
- Solid Flip-Up Cover (Front)
Romeo4T-Solar
- 1x SIG SAUER ROMEO4T-Solar Red Dot Sight
- 1x Low Mount
- 1x Killflash
- 1x Rubber Bikini Lens Cover
- 1x Multi-Tool
- 1x Mount Spacer
- 1x Long Mount Screws
- 1x Cleaning Cloth
- 1x CR2032 Battery
- Clear Flip-Up Covers
- Solid Flip-Up Cover (Front)
We include an 8.5" x 11" rifle zero target with every rifle optic. We recommend a 50/200 meter zero for most 5.56 rifles. (Click on the thumbnail for a printable version.)
How To Shoot Part 2: Zeroing – Video – T.REX ARMS
Specs
FEATURES
Romeo4T-PRO
- Users can select from 4 different integrated reticle options (Dot, Circle-Dot, Dot with Holds, Circle-Dot with Holds)
- Uses an ultra-efficient red LED illumination for daylight visibility and extended runtime
- 50,000-hour battery life
- Runs on readily available CR2032 batteries
- MOTAC (motion-activated illumination) powers up or down when sensing motion
- Unlimited eye relief to acquire aiming point and target, regardless of eye position behind sight
- Strong, lightweight aircraft-grade 7075-T6 aluminum housing
- Waterproof, IPX 8 rated, and fog-proof
Romeo4T-Solar
- Users can select from 4 different integrated reticle options (Dot, Circle-Dot, Dot with Holds, Circle-Dot with Holds)
- Uses an ultra-efficient red LED illumination for daylight visibility and extended runtime
- 50,000-hour battery life, extended to 100,000 hours with use of the solar function
- Runs on readily available CR2032 batteries
- MOTAC (motion-activated illumination) powers up or down when sensing motion
- Unlimited eye relief to acquire aiming point and target, regardless of eye position behind sight
- Strong, lightweight aircraft-grade 7075-T6 aluminum housing
- Waterproof, IPX 8 rated, and fog-proof
View the User Manual HERE.
View all the reticle options HERE.
Assembled in the USA.
Warranty: Covered by SIG SAUER's manufacturer warranty. Warranty service is provided by SIG SAUER.
TECHNICAL SPECIFICATIONS
Romeo4T-PRO
| Overall Length | 67.5 mm |
| Overall Width | 50 mm |
| Height | 62.5 mm |
| Weight | 6.3 oz |
| Center Dot Size | 2 MOA |
| Adjustment Increments | 0.5 MOA |
| Illumination Settings | 9 Daytime / 3 NV |
| Run Time | 50,000 hours |
| Battery Type | (1) CR2032 |
| Waterproofing | IPX 8 |
Romeo4T-Solar
| Overall Length | 85.5 mm |
| Overall Width | 46 mm |
| Height | 63.5 mm |
| Weight | 7.6 oz |
| Center Dot Size | 2 MOA |
| Adjustment Increments | 0.5 MOA |
| Illumination Settings | 10 Daytime / 2 NV |
| Run Time | 100,000 hours |
| Battery Type | (1) CR2032 |
| Waterproofing | IPX 8 |
30 Day Return Policy
Return or exchange anytime within 30 days of receipt. Available for domestic orders only. Item must be in new condition and in the unopened original manufacturer packaging. Customer pays return shipping.
Learn more →Shipping Restrictions
- Cannot be shipped outside the US.
- Cannot be shipped to: AS, FM, GU, MH, MP, PR, PW, VI.




