Click to see full view
Sightmark
Overview
The Sightmark Laser Boresight for 40 S&W Pistols is designed to help you quickly and accurately align your firearm's sights. Utilizing a boresight laser, this tool allows builders to ensure their optics are perfectly zeroed before live firing, saving both time and ammunition. While this specific boresight is tailored for 40 S&W pistols, builders often integrate similar sighting tools in AR-15 setups, particularly those configured with a Mid-Length gas system and chambered in 5.56 NATO.
Prices checked
Sightmark Laser Boresight for 40 S&W Pistols - SM39016 was the eighth most added laser on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it is the fourth most added laser on the site. Builds with this laser are mostly chambered in 5.56 NATO (73%, then .223 Wylde 13%), mostly on mid-length gas (66%, then carbine-length 20%), and mostly AR-15 (91%).
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today all 6 retailers we track have it in stock. Prices barely moved in September 2026, holding around $35.97, so there haven't been real sales lately. Buying today, the lowest price is $34.99 at Ammunition Depot, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
We ranked every laser by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Laser & Aiming Device Guide →The part most often added in each category by the builds that include this one
BLEM PSA AR15 Complete Classic Stealth Lower, Black
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
EOTECH 3x30.5mm X 21.6mm Holographic Hybrid Green Dot Sight - HHSGRN
SureFire X300-A Turbo Weapon Light - 650 Lumens - Tan
Daniel Defense Collapsible Mil-Spec Buttstock, Brown - 21-091-04179-011
SureFire Rail Grabber Tape Switch - 7" - Black
Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Sightmark Laser Boresight for 40 S&W Pistols - SM39016
| Build | Parts | Total |
|---|---|---|
 | 27 | $4183.77 |
 | 17 | $1722.93 |
 | 25 | $4807.78 |
 | 34 | $4781.16 |
 | 11 | $644.19 |
 | 22 | $2040.16 |
 | 19 | $5059.25 |
 | 17 | $3074.86 |
| 26 | $2595.69 |
2 global ratings
Top reviews
Sightmark boresight in 40 S and W has a side mounted switch that activates the laser cleanly. Drops into the chamber and projects the dot on a 25 yard target without firing a round. Saves significant ammo when initially zeroing optics.
Sightmark boresight for 40 S and W gets you on paper without burning ammo. Drops into the chamber, the red dot shows up on a target at 25 yards in normal indoor lighting. Battery lasts a long time with intermittent use. Saves time and ammo when zeroing a new sight.
