Titan lists the same features for both guns: a straight line fluid passage, an angled handle and lightweight metal construction. The difference that matters is pressure: the M-4 is rated 3600 psi (24.8 MPa) and the M-8 7700 psi (53.1 MPa). The M-8 comes with a 1/4 in. or a 3/8 in. inlet fitting. Both use one shared parts diagram.
What the M-Series guns are
Titan calls them the M-4 Mastic Gun and the M-8 Mastic Gun. The site's parts diagram calls the pair the M-4 / M-8 High Capacity Spray Gun, so you may see either name. Titan lists the same features on both: a straight line fluid passage that allows maximum flow rate, an angled handle for increased comfort and lightweight metal construction.
We do not claim anything beyond that name about which coatings suit which gun, and we give no weight, flow or trigger figures because Titan's pages do not publish ones we can verify.
Side by side
Titan M-4 and M-8 compared
| M-4 | M-8 | |
|---|---|---|
| Site part number | 0289013 | 0289014 |
| Maximum pressure (Titan) | 3600 psi (24.8 MPa) | 7700 psi (53.1 MPa) |
| Inlet | 3/8 FNPT, per dealer listings | 1/4 in. inlet fitting on the 0289014; a 3/8 in. inlet fitting version also exists |
| Listed features | Straight line fluid passage, angled handle, lightweight metal | Same |
The M-4 inlet size comes from dealer listings, not from Titan's page. Confirm yours by phone if the thread matters for your hose.
The M-8 is sold with two inlet fittings, a 1/4 in. fitting on the 0289014 and a 3/8 in. fitting on a second M-8 listing. Check which one you have before you order a hose, because the fitting at the gun end has to match.
What the rating means for hose, tip and guard
A gun rating is only as useful as the rest of the setup. The lowest-rated component in the system, whether hose, gun, tip, guard or fitting, is the limit for everything. Titan rates its 0289228 tip guard up to 5000 psi (34.5 MPa) and its 661-027 HP tip guard up to 7700 psi (53 MPa). Titan's TR1 high pressure tips are rated 7700 psi (53.1 MPa); see the TR1 high pressure tips page.
In practice that means a 7700 psi M-8 only reaches its rating with a 7700 psi guard, a matching tip and a hose that is rated that high. On the M-4, the standard guard is already above the gun's 3600 psi.
Shared repair parts
Both guns share one diagram family, the M-4 / M-8 High Capacity Spray Gun pages. The parts list has 16 parts. The repair kit is 2348175. Other parts listed include the 2333189 complete trigger, the 2343066 gun housing, the 2347490 filter housing, the 0043303 handle sealing washer and the 0089957 coarse green gun filter, 2-pack. Titan does not publish what is in the repair kit, so ask us before ordering if you need to know.
Accessories listed with the guns
The M-4 and M-8 mastic guns and accessories page lists the two guns, the 2348175 repair kit and the 765-360 splatter nozzle. We do not describe what the splatter nozzle is used for beyond its name, so check with Titan's documentation or call us.
Choosing
Pick by the pressure your sprayer, hose and tip need. If your sprayer and hose top out around 3600 psi, the M-4's rating matches them. If your setup is built for higher pressure, the M-8's 7700 psi rating is the one that fits, provided everything else keeps up. If you are unsure which gun you already have, the part number on the gun or the inlet size is the quickest check; call (713) 931-0006 with it and we will confirm the match.
M-Series guns and parts from this guide:
The Short Version
The M-4 (3600 psi) and M-8 (7700 psi) share listed features, one parts diagram and one repair kit, 2348175. Choose by the pressure your setup needs, make sure the inlet and hose match, and keep every component within the lowest rating.
Not sure which M-Series gun or part you need?
Call (713) 931-0006 with the gun's model number and our parts team will confirm the part before you order.
(713) 931-0006Order by Parts Diagram