Midwest Industries Combat Rear Back Up Iron Sight - MI-CBUIS
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Midwest Industries
Overview
The Midwest Industries Combat Rear Back Up Iron Sight is a forged sight designed to provide a reliable backup aiming solution for your AR-15. Constructed from 7075-T6 aluminum, this rear sight is lightweight yet durable, ensuring it can withstand the rigors of use while maintaining precision. It's a common choice for builds featuring a carbine gas system and chambered in 5.56 NATO, where reliability and accuracy are essential.
Specifications
Available Merchants(8)
Prices checked
Price Alert
September 2026 on GunPartPicker
Midwest Industries Combat Rear Back Up Iron Sight - MI-CBUIS ranked #11 of the 73 iron sights builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #12 of the 162 iron sights builders have added. Builds with this iron sight are mostly chambered in 5.56 NATO (63%, then 300 Blackout 13%), split between mid-length (46%) and carbine-length (31%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 5 of the 8 retailers we track have it in stock. The best price drifted down from $73.95 to $71.01 over September 2026 without a real sale. Buying today, the lowest price is $73.95 at Optics Planet.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all builds →Builds in the community that include the Midwest Industries Combat Rear Back Up Iron Sight - MI-CBUIS
| Build | Parts | Total |
|---|---|---|
 | 31 | $3520.85 |
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