Holy Warrior S2-XPS Red Dot Sight PK252 a bolt carrier with silver

a bolt carrier with silver coating and of course as mentioned earlier

Quick Change Spring: Yes

Don't have clearance for TDC you say

the gearbox was designed to house the MOSFET in the back near the grip

Holy Warrior S2-XPS Red Dot Sight PK252 a bolt carrier with silverMaterial7075 Aluminum material Finishing Hard anodized with CNC Tech Color Black Tan Mount1" Weaver or MIL STD 1913 rail Water Resistant33ft. (10 m) depth Power Source1Xcr123A battery Details gauge function exactly same as the original. fully restored the original Eotech EXPS3 details Clear lens, high transmittance, no mirror effect. Easy aim with a clear red dot under a strong light environment This EXPS3 replica brings wonderful two eyes open