Surefire l72 laser module - SureFire L72 Visible Red Laser Sight 635nM Module

I am mounting the Surefire L72 on a S&W M&P-15X. The L72 is housed in a self-assembled M550 housing (Surefire parts; A12 Battery Adapter, A21 housing body, M10 1" Ring and Surefire XM07 tail cap switch) all purchased here; "Surefire Build-Your-Own" configurator. Easy to assemble (battery install instructions in the manual are backwards), I had the LAM assembled and sighted in at 30 yds in about 20 minutes.
Pros: Red laser visible in daylight, adjustable/lockable x/y axis prism zeroing, durable housing
Cons: Expensive, compatible self-assembled M550 or Millenium Weaponlight housings are longer and bulkier then most other laser modules

This review was written in the old system and had content requirements that are different than reviews written today.