UTG MNT-950CS Sub-Compact Rear Sight – A2 Aperture for Picatinny

.br-product{font-family:Arial,Helvetica,sans-serif;line-height:1.6;color:#222;}
.br-product h2{font-size:1.2rem;margin-top:28px;}
.br-product ul{padding-left:18px;}
.br-product .info-box{background:#ffdddd;border-left:6px solid #c40000;padding:12px;margin:20px 0;}
.br-product .tip-box{background:#eef6ff;border-left:6px solid #2a6fdb;padding:12px;margin:20px 0;}
.br-product .trust-box{background:#eaf7ea;border-left:6px solid #2f8f2f;padding:12px;margin:20px 0;}
.br-product .compare-box{background:#f5f5f5;border-left:6px solid #444;padding:12px;margin:20px 0;}
.br-product details{background:#f2f2f2;padding:10px;margin-bottom:8px;border-radius:4px;}
.br-product summary{font-weight:600;cursor:pointer;}

UTG Sub-Compact Rear Sight with full elevation and windage adjustment – folding backup rear sight for AR and Carbine setups

Backup sights aren’t just decoration next to the red dot – they serve as a mechanical backup when electronics, battery, or optic fail.
The UTG Sub-Compact Rear Sight is a compact folding rear sight with full elevation and windage adjustment for Picatinny/Weaver platforms. Designed for AR15, PCC, and Carbine setups with classic backup sight logic.

The design deliberately follows military A2 systems with dual diopter, clearly defined clicks, and repeatable adjustments. At the same time, the form factor remains compact enough for modern red dot and low-profile setups.

Important note for classification:
A backup rear sight does not replace a high-quality red dot or LPVO – it serves as a mechanical emergency or training sight.
The rear sight has the correct height for many AR15/Carbine setups with standard front sights or compatible backup sights.
Check before purchase: Picatinny/Weaver compatibility, existing front sight height, co-witness configuration, and desired optic setup.
Mechanical sights require proper zeroing. An incorrect front sight height makes even the best rear sight unusable.

What makes this product technically special:
✔ Full elevation and windage adjustment for precise zeroing
✔ Dual diopter in A2 style for CQB and distance applications
✔ Aluminum/steel construction increases stability on stressed platforms
✔ Defined clicks ensure repeatable click adjustments
✔ Compact design fits well with modern red dot setups

Why this product?

Many cheap backup sights offer only coarse adjustment or feel mechanically sloppy. The UTG Sub-Compact Rear Sight instead relies on clearly defined clicks and full adjustability.

Particularly interesting is the classic A2 diopter logic with two differently sized apertures. This allows better adaptation of the sight for close range or more precise shots at medium distance.

Dual diopter system: large aperture for fast target acquisition, small aperture for more precise distance shooting.

Full adjustability: precise elevation and windage tuning.

Compact form factor: practical alongside modern red dot or magnifier setups.

Metal construction: more stable and durable than many polymer backup sights.

Trainer tip: Large and small diopters have different tasks
The large CQB aperture is faster and more forgiving for dynamic target acquisition at close range.
The smaller diopter improves precision and clean centering of the front sight at medium distance.
Many users keep only one aperture active permanently, missing out on a real advantage of classic A2 systems.

Our assessment

The UTG Sub-Compact Rear Sight is neither an ultra-light minimal backup sight nor a high-end duty system like specialized premium folding sights. Its strength lies rather in the classic mechanical system logic.

The combination of metal construction, full adjustability, and A2 dual diopter makes this rear sight special
s interesting for range, training, and classic AR15 setups.

Those looking for maximum weight savings or extremely low micro-sights will find more compact specialized solutions.

Suitable for:

AR15 and PCC setups
Range and training platforms
Backup sight configurations with red dot
Users with classic A2 sight logic

Less suitable for:

Ultralight minimal setups
Low-profile micro-sights with extremely low height
Fixed precision optics without backup needs
Extreme specialized or competition platforms

Direct classification:
✔ A2 dual diopter: more versatile for CQB and distance training
✔ Micro backup sights: more compact and lighter, but often less precisely adjustable
✔ Fixed carry-handle systems: more robust, but significantly bulkier
The UTG rear sight is especially useful for modern AR15 setups with classic mechanical backup logic.

Use cases

AR15 backup sight: mechanical reserve alongside red dot or LPVO.

Range training: fundamentals with classic diopter sighting.

PCC setup: compact rear sight for dynamic platforms.

Carbine training: reproducible sighting work at short and medium distances.

Practical tip: regularly train backup sights
Many mount backup sights, zero them once, and then never use them again.
Especially under stress or optic failure, unpracticed mechanical sighting surprisingly costs a lot of time.
Therefore, regular transitions between optic and backup sights should be consciously trained.

Features & construction

Dual diopter in A2 style: two differently sized apertures for fast CQB applications or more precise distance work.

Full elevation/windage adjustment: allows clean zeroing of the sight.

Spring-assisted detent: defined reproducible clicks when adjusting.

Aluminum/steel construction: higher durability than pure polymer systems.

Picatinny/Weaver mount: compatible with modern AR and carbine platforms.

Technical data

Model: UTG Sub-Compact Rear Sight w/ Full W/E Adjustment

Material: Aluminum / steel – robust combination for stressed weapon platforms.

Color: Black – matte, low-reflection surface.

Mounting system: Picatinny / Weaver.

Length: 43 mm – compact design for modern setups.

Width: 38 mm – fits standard upper receivers.

Height: 46 mm – matched to classic AR15 sight line.

Weight: approx. 96 g – sturdier than ultralight polymer backup sights.

Sight: A2 dual diopter with large and small aperture.

Scope of delivery

UTG Sub-Compact Rear Sight
Mounting hardware

Not included:
Front sight, red dot, magnifier, or other accessories are not included.

FAQ

Does the rear sight fit every Picatinny rail?
Yes, as long as the weapon has a standardized Picatinny or Weaver rail.

What are the two diopter apertures for?
The large aperture is faster for CQB and close range, the smaller aperture more precise at medium distance.

Can I combine the rear sight with a red dot?
Yes. The height is matched to many classic co-witness and backup sight setups.

Is the rear sight fully adjustable?
Yes. Both elevation and windage adjustments are possible.

Is the rear sight made of metal?
Yes. The construction consists of aluminum and steel.

Conclusion: The UTG Sub-Compact Rear Sight is a robust and precisely adjustable backup rear sight for AR15, PCC, and carbine setups with classic A2 sight logic and a modern compact design.