u/slubsocks

Been tinkering on this one for a while and finally got it where I want it, so I figured I’d share.
Base gun is a Glock 17 Gen 3 pattern built on a Grey Ghost Precision full‑size Combat Pistol frame. KKM match barrel, KKM comp, plus three inline slide ports. Slide is milled clean: no irons, direct‑milled RMR footprint running a 1 MOA Trijicon SRO. Surefire X300U up front.
Trigger is a Superior Triggers duty‑style drop‑in that breaks around a crisp 3–3.5 lb. It’s still very much something I’d trust in a defensive role, but clean enough that the dot basically moves when I think “press.” Superior really nailed the wall/reset feel on this one for a duty/defense hybrid build.[superiortriggers +2]
Took it out today and it’s stacking 1” groups at 25 yards when I do my part. For a comped, ported “duty” gun with a light and optic, I’m more than happy with that. Recoil impulse is stupid flat; the dot barely leaves the window on decent splits.
@superior_triggs

I bought a four hundred dollar Rock Island .45 as a beater to learn on, then did the fitting, tuning, and setup myself before sending it out for engraving and coatings, so the gun is as much a proof of concept in my own limited gunsmithing as it is a carry and match pistol.

Follow the thread:
https://www.reddit.com/r/1911/s/EQIuK1sj9V

Frame, slide, and machine work
Slide optics cut for Trijicon RMR/SRO footprint by Guncuts.
Slide, frame, and grips engraved by Sliverback Panda (cosmetic work, but done after mechanical setup).
Frame rails stoned and honed, then slide refit and checked for zero vertical movement at the barrel hood in battery. Frame to slide does have slight wobble.
Trigger bow track/housing stoned and polished to remove roughness and reduce drag on the new trigger bow.
Barrel throat polished and frame feed ramp polished for reliable feeding with JHP and match ammo, keeping correct 1911 ramp geometry.
A Marvel‑style disconnector cut was hand filed into the underside of the slide’s disconnector rail so the disconnector cams down a small angled ramp instead of crashing into a hard edge, which smooths cycling and removes the “speed bump” in the stroke.
The hammer to firing pin stop (tip of hammer) was stoned to take the crash out so the hammer no longer cams backward on slide.

Fire‑control group and tuning
EGW 1911 Hard Sear (10040), tool‑steel, fully machined, installed and stoned to mate with hammer hooks for a crisp, safe break.
EGW HD Ball Head Long Disconnector (10050), blued, installed and fit for clean reset and correct timing with the slide.
TMC Ultralight Match 1911 Trigger, solid medium flat black, aluminum shoe with stainless bow, installed and fit (bow width/height, pre‑travel tabs, overtravel screw).
ISMI 17 lb mainspring/hammer spring installed in the mainspring housing.
Titanium hammer strut and titanium mainspring cap installed to reduce reciprocating weight and resist corrosion.
Wilson Combat plunger tube spring installed to firm up thumb safety and slide‑stop detents.
EGW Evolved 1911 Sear Spring installed, with its longer, lightened leaves tuned for full, positive contact on the sear, disconnector, and grip safety while keeping the pull smooth and consistent.
Sear, hammer hooks, and disconnector engagement surfaces stoned and polished for a clean, match‑grade break while maintaining safe hook height and proper primary/secondary angles.

Slide, extractor, firing pin system
EGW Oversized Firing Pin Stop, Series 70, .45 ACP, blue, cut for adjustable sight, fit to the slide and extractor to prevent clocking and tune recoil impulse.
Oversized .092 firing pin for .45 ACP installed and checked for free movement and correct protrusion.
EGW HD Extractor, .45 ACP, Series 70, blue, installed, tensioned, and checked for correct hook engagement and ejection pattern.

Barrel, bushing, recoil system, compensator
EGW Thick Flange Barrel Bushing, blue, .699 OD, gunsmith‑fit straight bore, custom cut to your .581 in barrel OD, installed and fit for tight but reliable lockup.
Barrel‑bushing compensator** **Government‑length 5 in 1911 comp that replaces the bushing, sized for 0.577–0.581 in barrel OD with 0.582–0.583 in ID, usable up to .45 ACP, adding about 1 in length and ~2.4 oz at the muzzle; fit to barrel and slide.
EGW 1‑piece tungsten 5 in guide rod installed to increase muzzle‑forward weight and smooth recoil.
EGW long‑nose recoil spring plug for thick‑flange bushing with .332 in hole, blue, installed to match the thick flange and guide rod.
Wilson Combat 1911 Flat‑Wire Recoil Spring, full‑size Government, chrome‑silicon, 15 lb (model 614G15).

Grips, magwell, magazines, and externals
Stan Chen SI magwell installed with mainspring housing.
LOK Grips 1911 Palm Swell GridLOK Brass panels (solid brass, aggressive GridLOK texture, palm‑swell profile) installed to add grip traction and significant weight.
Defensive magazines: Wilson Combat Vickers/ETM 8‑round .45 ACP magazines set up.
Inception Defense 1911 Base Plate, extra‑large, gold anodized, fitted to Wilson Combat Elite
0.6 ounces of tungsten weight added in the internal pockets of the base plates to boost inertia and guarantee positive, drop‑free ejection.
Competition magazines: Mec‑Gar full‑size 1911 .45 ACP 10‑round extended magazines, upgraded with Tripp Research “Super 9” spring and hybrid follower kits for improved feeding and lock‑back.
SureFire X300U‑A weapon light mounted on the dust cover rail on both the Rock Island (about 1,000 lumens, ~4 oz with batteries).

Optic and protection
Trijicon SRO 1 MOA installed in the RMR‑pattern cut, correctly torqued and secured.
JagerWerks BROS (Battle Ready Optic Shield) for SRO installed under and around the SRO to add impact protection and brass deflection, adding ~1 oz of stainless shield.

Coatings and finish work
High‑polish TiN by STS Firearms on the slide, frame, JagerWerks BROS, and firing pin, for gold‑tone, hard, low‑friction surfaces.
DLC Plus by Advanced Coating Technologies (actechnol.com) on: barrel, guide rod, small internal parts (bushing, plug, safeties, slide stop, pins, etc.), and brass GridLOK grips, providing very high hardness, low friction, and corrosion resistance in a dark finish.

Ammunition:
Primary defensive load: Federal HST 230 gr JHP, standard pressure, .45 Auto.
Secondary carry load (bought on discount): Hornady American Gunner .45 Auto, 185 gr XTP, standard pressure.
Experimental / specialty load (on hand): 160 gr +P controlled‑fragmentation .45 ACP.
Practice load: 230 gr FMJ ball, standard pressure (match recoil spring tuned for this).

Tisa SSR Duty 45 with V10 porting. She's pretty dirty after zeroing my optics.