I highly recommend this for the Thompson M1A1 or the 1928 Chicago Typewriter Tommy gun (mine)!
My round drum broke, so I bought this while I was dealing with this site's customer support. They are currently shipping me a new drum, but it took a while because they had to inspect it. Anyways, I liked this so much, that I bought another at a local Airsoft and Paintball store! It almost holds as much as the drum and is lighter weight! I HIGHLY RECOMMEND THIS MAGAZINE!
2. ALMOST AS MUCH AMMO AS THE HEAVY ROUND DRUM MAGAZINE
3. FULL METAL
5. NEVER JAMS
6. EASY TO WIND
7. LIKE ALL THOMPSON MAGS, SLIDES IN SECURELY WITH THE SLIDER
8. FITS BOTH THOMPSONS
9. GREAT PRICE