30-Day Perfect Fit Guarantee — If the adapter plate does not fit your Glock 43X/48 MOS perfectly, return it for a full refund. No questions asked.
- Wide Compatibility: Precision-engineered for Glock 43X/48 MOS and Springfield Hellcat OSP. Direct mount for Holosun 407K/507K, EPS, EPS Carry, and Trijicon RMRcc (Shield RMSc footprint). No slide modification required.
- Enhanced Stability: Reinforced recoil posts keep your optic locked in place under high-stress, heavy-recoil conditions — zero wobble, zero shift.
- Easy 5-Minute Installation: One-piece design with included mounting screws and thread-locking compound. No gunsmith needed.
- Ultra-Thin Profile: Just 0.058 inch thick — minimizes height over bore, maintains co-witness with factory iron sights, and improves follow-up shot speed.
- CNC-Machined Titanium: Aerospace-grade titanium with MIL-SPEC Type III hard coat anodized finish. Exceptional impact resistance, corrosion protection, and lifetime durability.
Watch: 5-Minute Installation Guide
See how easy it is to install the AltitudeCraft AC311 adapter plate on your Glock 43X MOS:
How Does AltitudeCraft Compare?
| Feature | AltitudeCraft AC311 | C&H Precision V4 | Generic Plates |
|---|---|---|---|
| Price | $25.99 | $51.99 | $15-20 |
| Material | Titanium | Aluminum | Aluminum / Steel |
| Thickness | 0.058 inch | ~0.06 inch | Varies |
| Recoil Posts | Reinforced | Standard | Basic |
| Finish | MIL-SPEC Type III | Anodized | Varies |
| Fit Guarantee | 30-Day | Not stated | None |
| Hardware Included | Yes + Loctite | Yes | Varies |
Does It Fit Your Setup?
Compatible Firearms:
- Glock 43X MOS
- Glock 48 MOS
- Springfield Hellcat OSP
NOT Compatible:
- Glock 43X (non-MOS) — requires slide milling
- Glock 19 MOS — different footprint
- Glock 17 MOS — different footprint
Compatible Optics (RMSc Footprint):
- Holosun 507K X2
- Holosun 407K X2
- Holosun EPS / EPS Carry
- Trijicon RMRcc
- Shield RMSc
- Swampfox Sentinel
What Shooters Are Saying
"Installed on my 43X MOS with a 507K in about 3 minutes. Zero wobble after 500 rounds. At this price point, it is a no-brainer over the C&H plate."
— Verified AltitudeCraft customer
"The titanium construction is a huge plus. Lighter than aluminum alternatives and significantly stronger. My 407K sits perfectly flush with no adapter plate gap."
— Verified AltitudeCraft customer
"Been running this on my Glock 48 MOS for 3 months of IDPA competition. Rock solid. The co-witness with factory sights is perfect."
— Verified AltitudeCraft customer
Not sure which red dot to pair with this plate? Read our in-depth guide: Best Red Dots for Glock 43X MOS — Direct Fit vs Adapter Plate Options
Frequently Asked Questions
What Glock models does this adapter plate fit?
The AltitudeCraft optic adapter plate is designed specifically for Glock 43X MOS and Glock 48 MOS models. It is precision-machined to match the factory MOS mounting pattern for a perfect, zero-play fit.
Which red dot sights are compatible?
This adapter plate supports all Shield RMSc footprint optics including Holosun 507K, 407K, EPS, EPS Carry, Trijicon RMRcc, Shield RMSc, and Swampfox Sentinel. It provides a direct-mount solution without additional adapters.
What material is the adapter plate made from?
It is CNC-machined from aerospace-grade titanium with a MIL-SPEC Type III hard-coat anodized finish. Titanium offers superior strength-to-weight ratio compared to aluminum, with better corrosion and impact resistance.
Will I achieve co-witness with my iron sights?
Yes. At just 0.058 inch thick, the adapter plate provides a perfect co-witness (or lower 1/3 co-witness depending on your optic model) with factory Glock sights, giving you a reliable backup aiming solution.
What hardware is included and how difficult is installation?
Each adapter plate comes with all necessary mounting screws, thread-locking compound, and step-by-step installation instructions. Installation takes under 5 minutes with basic tools — no gunsmith required. Watch our installation video.
What is the 30-Day Fit Guarantee?
If the adapter plate does not fit your Glock 43X/48 MOS perfectly, return it within 30 days for a full refund. No questions asked. We stand behind our precision machining.
How does this compare to the C&H Precision plate?
The AltitudeCraft AC311 is machined from titanium (vs aluminum for C&H), features reinforced recoil posts, and comes with a 30-Day Fit Guarantee — all at half the price ($25.99 vs $51.99). Both are quality options, but we believe our titanium construction and value pricing make the AC311 the better choice.
Customer Reviews
Based on 2 reviews
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Perfect fit! Thanks a million!
J
Ordered this adapter plate extremely thin super sturdy. Works perfectly on my GEN 5 GL 43X MOS can barely see it. Its so flushed with my 43X MOS slide and my 407K X2 you don't even notice it. Makes it fir nice sleek look and feel, great tactical looking aesthetics. It looks good! Would shoot you a pic but i don't see how on this review site.
