A.r.m.s.,inc AR-15 Flip-Up Adjustable 40L Low Profile Rear Sight Black
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A.R.M.S.
Overview
The A.R.M.S. Inc. AR-15 Flip-Up Adjustable 40L Low Profile Rear Sight is designed for quick deployment and easy adjustments, allowing builders to fine-tune their aiming experience on the fly. Its flip-up mechanism enables a low-profile design that minimizes snagging while providing effective sighting when needed. This sight is commonly found in mid-length gas system builds chambered in 5.56 NATO, making it a practical choice for those looking to enhance accuracy and versatility in their AR-15 setup.
Specifications
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Build history on GunPartPicker
Builders have added the A.r.m.s.,inc AR-15 Flip-Up Adjustable 40L Low Profile Rear Sight Black to their builds on GunPartPicker. Since April 2026, it ranks #47 of the 69 rear sights builders have added. Builds with this rear sight are mostly chambered in 5.56 NATO (62%, then .223 Wylde 15%), split between mid-length (56%) and carbine-length (22%) gas systems, and mostly AR-15 (85%).
It was out of stock everywhere we track every time we checked in October 2026, and today the one retailer we track is out of stock. Listed prices start at $155 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Read the guide: AR-15 Rear Sight Guide →Frequently Built With
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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.
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