$75.99
3 in stock
Online inventory may differ from in-store availability.
Quick turnaround so you get your gear sooner.
Trusted checkout with industry-standard protection.
Keeping Traditions Alive Since 1953
Secure Transactions provided with 
The ProMag DRMA33 is a 30-round drum magazine purpose-built for the Sig Sauer P365, P365X, and P365XL in 9mm. It is not a universal mag dressed up with an adapter — the feed tower is designed to match the P365 platform the same way the factory magazine does, with a full-length steel internal insert that is stamped and welded to factory-spec dimensions. That matters a lot when it comes to reliable feeding, and ProMag put the work in where it counts.
The drum body itself is molded from a proprietary DuPont Zytel-based polymer, which gives you a solid balance of lightweight handling and genuine durability. The upper tower uses heat-treated and painted carbon steel, and the magazine spring is formed from heat-treated stainless steel wire for consistent tension and solid corrosion resistance. The injection-molded follower keeps cartridges indexed correctly throughout the feed cycle, which helps prevent the kind of nose-diving or misalignment that plagues cheaper extended magazines.
This thing is clearly a range toy, and there is nothing wrong with that. If you spend a lot of time at the range running your P365 and you are tired of loading and reloading standard-capacity mags all afternoon, the DRMA33 lets you dump a lot more rounds downrange between breaks. It is also just a fun addition for anyone who wants to stretch out a range day without the constant interruption of reloading.
All ProMag magazines are made in the USA and come backed by a lifetime guarantee against manufacturer defects. The springs go through a precision winding process using heat-treated wire, and ProMag quality-checks each step of assembly to keep things consistent across production runs.
Yes, the DRMA33 is listed as compatible with the Sig Sauer P365, P365X, and P365XL. The feed tower is designed around the P365 magazine footprint, so it locks up on the same magwell across that whole platform family. Always confirm fitment with your specific variant before your first range trip.
Drum magazines generally take a bit more technique than a standard stick mag, but the DRMA33 uses a ratcheting mechanism that lets you drop rounds in without fighting the spring compression the way older drum designs required. Having a good surface to brace the drum against while loading can make the process a lot more manageable. It gets easier once you have done it a few times.
ProMag does not publish official guidance on long-term loaded storage for this drum. The stainless steel spring is designed to resist fatigue and corrosion, but with any drum magazine, it is a good habit to unload it when it will be sitting unused for a long time. For range use and rotation, leaving it loaded for a reasonable period between sessions should not pose a concern.
The DRMA33 uses a DuPont Zytel polymer body with a steel-reinforced upper tower that mirrors the factory magazine construction, so the feed interface is taken seriously. ProMag is an established American manufacturer that backs all of its magazines with a lifetime warranty against defects. This is an aftermarket extended-capacity drum, so it is best suited for range use rather than duty or carry applications.
The DRMA33 is chambered for standard 9mm Luger and should run reliably with common ball and hollow point ammunition of standard pressure. As with any high-capacity magazine, running a variety of ammo types during your first range session is a smart way to confirm reliable function before committing to a specific load.
The ProMag DRMA33 is built for P365 owners who want to maximize trigger time at the range without constantly stopping to reload. It is a great pick for competitive shooters who run high round counts in practice, or anyone who just wants to have more fun during a range session. It is not designed as a carry or defensive magazine.
| UPC | 708279014833 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | DRM-A33 |
| Model Fit | P365 |
| Model | |
| Brand Fit | Sig Sauer |
| Caliber/Gauge | 9mm |
| Capacity | 30 |
| Shipping Weight | 1.39 |
| Product Type | Accessory-Magazines |
| Length | 14 |
| Package Height | 3.5 |
| Package Width | 5.5 |
You must be logged in to post a review.
Reviews
There are no reviews yet.