Fixed rear sight for STI Spartan with LPA adjustable rear sight
HD-002-S/U Plain black fixed rear sight that fits slides machined for the LPA adjustable rear sight
Loctite 262 thread locking coumpound
AKA - The truth about sight heights!
Labor to replace your existing rear sight, no machine work. Insured return shipping back to you is $25.50 additional
Advise for what to expect when replacing dovetail mounted sights on your 1911